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/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.phloc.commons.collections;//NOPMD
import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.Collection;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import com.phloc.commons.CGlobal;
import com.phloc.commons.ValueEnforcer;
import com.phloc.commons.annotations.PresentForCodeCoverage;
import com.phloc.commons.annotations.ReturnsMutableCopy;
import com.phloc.commons.annotations.ReturnsMutableObject;
import com.phloc.commons.equals.EqualsUtils;
import com.phloc.commons.lang.ClassHelper;
import com.phloc.commons.lang.GenericReflection;
/**
* Provides additional helper methods for array handling.
*
* @author Philip Helger
*/
@Immutable
public final class ArrayHelper
{
/** Constant empty boolean array */
public static final boolean [] EMPTY_BOOLEAN_ARRAY = new boolean [0];
/** Constant empty byte array */
public static final byte [] EMPTY_BYTE_ARRAY = new byte [0];
/** Constant empty char array */
public static final char [] EMPTY_CHAR_ARRAY = new char [0];
/** Constant empty double array */
public static final double [] EMPTY_DOUBLE_ARRAY = new double [0];
/** Constant empty float array */
public static final float [] EMPTY_FLOAT_ARRAY = new float [0];
/** Constant empty int array */
public static final int [] EMPTY_INT_ARRAY = new int [0];
/** Constant empty long array */
public static final long [] EMPTY_LONG_ARRAY = new long [0];
/** Constant empty short array */
public static final short [] EMPTY_SHORT_ARRAY = new short [0];
/** Constant empty boolean array */
public static final Boolean [] EMPTY_BOOLEAN_OBJ_ARRAY = new Boolean [0];
/** Constant empty byte array */
public static final Byte [] EMPTY_BYTE_OBJ_ARRAY = new Byte [0];
/** Constant empty char array */
public static final Character [] EMPTY_CHAR_OBJ_ARRAY = new Character [0];
/** Constant empty double array */
public static final Double [] EMPTY_DOUBLE_OBJ_ARRAY = new Double [0];
/** Constant empty float array */
public static final Float [] EMPTY_FLOAT_OBJ_ARRAY = new Float [0];
/** Constant empty int array */
public static final Integer [] EMPTY_INT_OBJ_ARRAY = new Integer [0];
/** Constant empty long array */
public static final Long [] EMPTY_LONG_OBJ_ARRAY = new Long [0];
/** Constant empty short array */
public static final Short [] EMPTY_SHORT_OBJ_ARRAY = new Short [0];
/** Constant empty Object array */
public static final Object [] EMPTY_OBJECT_ARRAY = new Object [0];
/** Constant empty String array */
public static final String [] EMPTY_STRING_ARRAY = new String [0];
@PresentForCodeCoverage
@SuppressWarnings ("unused")
private static final ArrayHelper s_aInstance = new ArrayHelper ();
private ArrayHelper ()
{}
/**
* Get the component type of the array (the type of which the array is made
* up)
*
* @param
* The component type of the array
* @param aArray
* The array to get the type from. May not be null.
* @return The class that determines a single element of the array.
*/
@Nonnull
public static Class getComponentType (@Nonnull final DATATYPE [] aArray)
{
ValueEnforcer.notNull (aArray, "Array");
final Class aComponentType = aArray.getClass ().getComponentType ();
return GenericReflection., Class > uncheckedCast (aComponentType);
}
/**
* Check if the passed object is an array or not.
*
* @param aObject
* The object to be checked. May be null.
* @return true if the passed object is not null and
* represents an array.
*/
public static boolean isArray (@Nullable final Object aObject)
{
return aObject != null && ClassHelper.isArrayClass (aObject.getClass ());
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final boolean... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final byte... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final char... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final double... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final float... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final int... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final long... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final short... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array who's size is to be queried. May be null.
* @return 0 if the passed array is null - it's length otherwise.
*/
@Nonnegative
public static int getSize (@Nullable final ELEMENTTYPE... aArray)
{
return aArray == null ? 0 : aArray.length;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final boolean... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final byte... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final char... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final double... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final float... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final int... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final long... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final short... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return true if the passed array is null or
* empty.
*/
public static boolean isEmpty (@Nullable final ELEMENTTYPE... aArray)
{
return getSize (aArray) == 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final boolean... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final byte... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final char... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final double... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final float... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final int... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final long... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final short... aArray)
{
return getSize (aArray) > 0;
}
/**
* @param aArray
* The array to be queried if it is empty. May be null.
* @return false if the passed array is null or
* empty.
*/
public static boolean isNotEmpty (@Nullable final ELEMENTTYPE... aArray)
{
return getSize (aArray) > 0;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final ELEMENTTYPE [] aValues,
@Nullable final ELEMENTTYPE aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final boolean [] aValues, final boolean aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final byte [] aValues, final byte aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final char [] aValues, final char aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final double [] aValues, final double aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final float [] aValues, final float aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final int [] aValues, final int aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final long [] aValues, final long aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getFirstIndex (@Nullable final short [] aValues, final short aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = 0; nIndex < nLength; ++nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final ELEMENTTYPE [] aValues,
@Nullable final ELEMENTTYPE aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final boolean [] aValues, final boolean aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final byte [] aValues, final byte aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final char [] aValues, final char aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final double [] aValues, final double aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final float [] aValues, final float aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final int [] aValues, final int aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final long [] aValues, final long aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Get the index of the passed search value in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return -1 if the searched value is not contained, a value
* ≥ 0 otherwise.
*/
public static int getLastIndex (@Nullable final short [] aValues, final short aSearchValue)
{
final int nLength = getSize (aValues);
if (nLength > 0)
for (int nIndex = nLength - 1; nIndex >= 0; --nIndex)
if (EqualsUtils.equals (aValues[nIndex], aSearchValue))
return nIndex;
return CGlobal.ILLEGAL_UINT;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final ELEMENTTYPE [] aValues,
@Nullable final ELEMENTTYPE aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final boolean [] aValues, final boolean aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final byte [] aValues, final byte aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final char [] aValues, final char aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final double [] aValues, final double aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final float [] aValues, final float aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final int [] aValues, final int aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final long [] aValues, final long aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Check if the passed search value is contained in the passed value array.
*
* @param aValues
* The value array to be searched. May be null.
* @param aSearchValue
* The value to be searched. May be null.
* @return true if the value array is not empty and the search
* value is contained - false otherwise.
*/
public static boolean contains (@Nullable final short [] aValues, final short aSearchValue)
{
return getFirstIndex (aValues, aSearchValue) >= 0;
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static boolean getFirst (@Nullable final boolean [] aArray, final boolean aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static byte getFirst (@Nullable final byte [] aArray, final byte aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static char getFirst (@Nullable final char [] aArray, final char aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static double getFirst (@Nullable final double [] aArray, final double aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static float getFirst (@Nullable final float [] aArray, final float aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static int getFirst (@Nullable final int [] aArray, final int aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static long getFirst (@Nullable final long [] aArray, final long aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static short getFirst (@Nullable final short [] aArray, final short aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the first element of the array or null if the passed array
* is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @return null if the passed array is null or empty
* - the first element otherwise (may also be null).
*/
@Nullable
public static ELEMENTTYPE getFirst (@Nullable final ELEMENTTYPE... aArray)
{
return getFirst (aArray, null);
}
/**
* Get the first element of the array or the passed default if the passed
* array is empty.
*
* @param aArray
* The array who's first element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the first element if the passed array is not empty, the default
* value if the passed array is empty.
*/
@Nullable
public static ELEMENTTYPE getFirst (@Nullable final ELEMENTTYPE [] aArray,
@Nullable final ELEMENTTYPE aDefaultValue)
{
return isEmpty (aArray) ? aDefaultValue : aArray[0];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static boolean getLast (@Nullable final boolean [] aArray, final boolean aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static byte getLast (@Nullable final byte [] aArray, final byte aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static char getLast (@Nullable final char [] aArray, final char aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static double getLast (@Nullable final double [] aArray, final double aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static float getLast (@Nullable final float [] aArray, final float aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static int getLast (@Nullable final int [] aArray, final int aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static long getLast (@Nullable final long [] aArray, final long aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
public static short getLast (@Nullable final short [] aArray, final short aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get the last element of the array or null if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @return null if the passed array is null or empty
* - the last element otherwise (may also be null).
*/
@Nullable
public static ELEMENTTYPE getLast (@Nullable final ELEMENTTYPE... aArray)
{
return getLast (aArray, null);
}
/**
* Get the last element of the array or the passed default if the passed array
* is empty.
*
* @param aArray
* The array who's last element is to be retrieved. May be
* null or empty.
* @param aDefaultValue
* The default value to be returned if the array is empty
* @return the last element if the passed array is not empty, the default
* value if the passed array is empty.
*/
@Nullable
public static ELEMENTTYPE getLast (@Nullable final ELEMENTTYPE [] aArray,
@Nullable final ELEMENTTYPE aDefaultValue)
{
final int nSize = getSize (aArray);
return nSize == 0 ? aDefaultValue : aArray[nSize - 1];
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getCopy (@Nullable final boolean... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getCopy (@Nullable final boolean [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getCopy (@Nullable final boolean [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final boolean [] ret = new boolean [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getCopy (@Nullable final byte... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getCopy (@Nullable final byte [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getCopy (@Nullable final byte [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final byte [] ret = new byte [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static char [] getCopy (@Nullable final char... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static char [] getCopy (@Nullable final char [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static char [] getCopy (@Nullable final char [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final char [] ret = new char [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static double [] getCopy (@Nullable final double... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static double [] getCopy (@Nullable final double [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static double [] getCopy (@Nullable final double [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final double [] ret = new double [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static float [] getCopy (@Nullable final float... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static float [] getCopy (@Nullable final float [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static float [] getCopy (@Nullable final float [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final float [] ret = new float [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getCopy (@Nullable final int... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getCopy (@Nullable final int [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getCopy (@Nullable final int [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final int [] ret = new int [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
@Nullable
@ReturnsMutableCopy
public static long [] getCopy (@Nullable final long... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static long [] getCopy (@Nullable final long [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static long [] getCopy (@Nullable final long [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final long [] ret = new long [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static short [] getCopy (@Nullable final short... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static short [] getCopy (@Nullable final short [] aArray, @Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static short [] getCopy (@Nullable final short [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final short [] ret = new short [nLength];
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a 1:1 copy of the passed array. Nested elements are not deep-copied -
* the references are re-used!
*
* @param aArray
* The array to be copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getCopy (@Nullable final ELEMENTTYPE... aArray)
{
return aArray == null ? null : getCopy (aArray, 0, aArray.length);
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements. Nested elements are not deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, only the available number of elements in the
* source array are copied.
* @return null if the passed array is null - a non-
* null copy otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getCopy (@Nullable final ELEMENTTYPE [] aArray,
@Nonnegative final int nLength)
{
return aArray == null ? null : getCopy (aArray, 0, Math.min (aArray.length, nLength));
}
/**
* Get a 1:1 copy of the passed array using the passed number of array
* elements starting at the specified index. Nested elements are not
* deep-copied - the references are re-used!
*
* @param aArray
* The array to be copied.
* @param nStartIndex
* The index where the copying should start. Must be >= 0!
* @param nLength
* The number of elements to be copied into the new array. May not be
* < 0. If the passed number of elements exceeds the number of
* elements in the array, an exception is thrown.
* @return null if the passed array is null - a non-
* null copy otherwise.
* @see System#arraycopy(Object, int, Object, int, int)
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getCopy (@Nullable final ELEMENTTYPE [] aArray,
@Nonnegative final int nStartIndex,
@Nonnegative final int nLength)
{
if (aArray == null)
return null;
final ELEMENTTYPE [] ret = newArraySameType (aArray, nLength);
System.arraycopy (aArray, nStartIndex, ret, 0, nLength);
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getConcatenated (@Nullable final ELEMENTTYPE [] aHeadArray,
@Nullable final ELEMENTTYPE [] aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final ELEMENTTYPE [] ret = newArraySameType (aHeadArray, aHeadArray.length + aTailArray.length);
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head and the array. The head
* element will be the first element of the created array.
*
* @param aHead
* The first element of the result array. If this element is
* null it will be inserted as such into the array!
* @param aTailArray
* The tail array. May be null.
* @param aClass
* The element class. Must be present, because in case both elements
* are null there would be no way to create a new array.
* May not be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static ELEMENTTYPE [] getConcatenated (@Nullable final ELEMENTTYPE aHead,
@Nullable final ELEMENTTYPE [] aTailArray,
@Nonnull final Class aClass)
{
if (isEmpty (aTailArray))
return newArraySingleElement (aHead, aClass);
// Start concatenating
final ELEMENTTYPE [] ret = newArray (aClass, 1 + aTailArray.length);
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array. If this element is
* null it will be inserted as such into the array!
* @param aClass
* The element class. Must be present, because in case both elements
* are null there would be no way to create a new array.
* May not be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static ELEMENTTYPE [] getConcatenated (@Nullable final ELEMENTTYPE [] aHeadArray,
@Nullable final ELEMENTTYPE aTail,
@Nonnull final Class aClass)
{
if (isEmpty (aHeadArray))
return newArraySingleElement (aTail, aClass);
// Start concatenating
final ELEMENTTYPE [] ret = newArray (aClass, aHeadArray.length + 1);
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static boolean [] getConcatenated (@Nullable final boolean [] aHeadArray,
@Nullable final boolean... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final boolean [] ret = new boolean [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static boolean [] getConcatenated (final boolean aHead, @Nullable final boolean... aTailArray)
{
if (isEmpty (aTailArray))
return new boolean [] { aHead };
final boolean [] ret = new boolean [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static boolean [] getConcatenated (@Nullable final boolean [] aHeadArray, final boolean aTail)
{
if (isEmpty (aHeadArray))
return new boolean [] { aTail };
final boolean [] ret = new boolean [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static byte [] getConcatenated (@Nullable final byte [] aHeadArray, @Nullable final byte... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final byte [] ret = new byte [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static byte [] getConcatenated (final byte aHead, @Nullable final byte... aTailArray)
{
if (isEmpty (aTailArray))
return new byte [] { aHead };
final byte [] ret = new byte [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static byte [] getConcatenated (@Nullable final byte [] aHeadArray, final byte aTail)
{
if (isEmpty (aHeadArray))
return new byte [] { aTail };
final byte [] ret = new byte [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static char [] getConcatenated (@Nullable final char [] aHeadArray, @Nullable final char... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final char [] ret = new char [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static char [][] getConcatenated (@Nullable final char [][] aHeadArray, @Nullable final char []... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final char [][] ret = new char [aHeadArray.length + aTailArray.length] [];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static char [] getConcatenated (final char aHead, @Nullable final char... aTailArray)
{
if (isEmpty (aTailArray))
return new char [] { aHead };
final char [] ret = new char [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static char [] getConcatenated (@Nullable final char [] aHeadArray, final char aTail)
{
if (isEmpty (aHeadArray))
return new char [] { aTail };
final char [] ret = new char [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static double [] getConcatenated (@Nullable final double [] aHeadArray, @Nullable final double... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final double [] ret = new double [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static double [] getConcatenated (final double aHead, @Nullable final double... aTailArray)
{
if (isEmpty (aTailArray))
return new double [] { aHead };
final double [] ret = new double [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static double [] getConcatenated (@Nullable final double [] aHeadArray, final double aTail)
{
if (isEmpty (aHeadArray))
return new double [] { aTail };
final double [] ret = new double [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static float [] getConcatenated (@Nullable final float [] aHeadArray, @Nullable final float... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final float [] ret = new float [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static float [] getConcatenated (final float aHead, @Nullable final float... aTailArray)
{
if (isEmpty (aTailArray))
return new float [] { aHead };
final float [] ret = new float [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static float [] getConcatenated (@Nullable final float [] aHeadArray, final float aTail)
{
if (isEmpty (aHeadArray))
return new float [] { aTail };
final float [] ret = new float [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static int [] getConcatenated (@Nullable final int [] aHeadArray, @Nullable final int... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final int [] ret = new int [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static int [] getConcatenated (final int aHead, @Nullable final int... aTailArray)
{
if (isEmpty (aTailArray))
return new int [] { aHead };
final int [] ret = new int [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static int [] getConcatenated (@Nullable final int [] aHeadArray, final int aTail)
{
if (isEmpty (aHeadArray))
return new int [] { aTail };
final int [] ret = new int [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static long [] getConcatenated (@Nullable final long [] aHeadArray, @Nullable final long... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final long [] ret = new long [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static long [] getConcatenated (final long aHead, @Nullable final long... aTailArray)
{
if (isEmpty (aTailArray))
return new long [] { aHead };
final long [] ret = new long [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static long [] getConcatenated (@Nullable final long [] aHeadArray, final long aTail)
{
if (isEmpty (aHeadArray))
return new long [] { aTail };
final long [] ret = new long [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static short [] getConcatenated (@Nullable final short [] aHeadArray, @Nullable final short... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final short [] ret = new short [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static short [] getConcatenated (final short aHead, @Nullable final short... aTailArray)
{
if (isEmpty (aTailArray))
return new short [] { aHead };
final short [] ret = new short [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static short [] getConcatenated (@Nullable final short [] aHeadArray, final short aTail)
{
if (isEmpty (aHeadArray))
return new short [] { aTail };
final short [] ret = new short [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get a new array that combines the passed two arrays, maintaining the order.
*
* @param aHeadArray
* The first array. May be null.
* @param aTailArray
* The second array. May be null.
* @return null if both array parameters are null -
* a non-null array with all elements in the correct
* order otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static String [] getConcatenated (@Nullable final String [] aHeadArray, @Nullable final String... aTailArray)
{
// If first array is invalid, simply
if (isEmpty (aHeadArray))
return getCopy (aTailArray);
if (isEmpty (aTailArray))
return getCopy (aHeadArray);
// Start concatenating
final String [] ret = new String [aHeadArray.length + aTailArray.length];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
System.arraycopy (aTailArray, 0, ret, aHeadArray.length, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed head element and the array. The
* head element will be the first element of the created array.
*
* @param aHead
* The first element of the result array.
* @param aTailArray
* The tail array. May be null.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static String [] getConcatenated (final String aHead, @Nullable final String... aTailArray)
{
if (isEmpty (aTailArray))
return new String [] { aHead };
final String [] ret = new String [1 + aTailArray.length];
ret[0] = aHead;
System.arraycopy (aTailArray, 0, ret, 1, aTailArray.length);
return ret;
}
/**
* Get a new array that combines the passed array and the tail element. The
* tail element will be the last element of the created array.
*
* @param aHeadArray
* The head array. May be null.
* @param aTail
* The last element of the result array.
* @return A non-null array with all elements in the correct
* order.
*/
@Nonnull
@ReturnsMutableCopy
public static String [] getConcatenated (@Nullable final String [] aHeadArray, final String aTail)
{
if (isEmpty (aHeadArray))
return new String [] { aTail };
final String [] ret = new String [aHeadArray.length + 1];
System.arraycopy (aHeadArray, 0, ret, 0, aHeadArray.length);
ret[aHeadArray.length] = aTail;
return ret;
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getAllExceptFirst (@Nullable final ELEMENTTYPE... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getAllExceptFirst (@Nullable final ELEMENTTYPE [] aArray,
@Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getAllExcept (@Nullable final ELEMENTTYPE [] aArray,
@Nullable final ELEMENTTYPE... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final ELEMENTTYPE [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getAllExcept (@Nullable final boolean [] aArray,
@Nullable final boolean... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final boolean [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getAllExcept (@Nullable final byte [] aArray, @Nullable final byte... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final byte [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static char [] getAllExcept (@Nullable final char [] aArray, @Nullable final char... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final char [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static double [] getAllExcept (@Nullable final double [] aArray, @Nullable final double... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final double [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static float [] getAllExcept (@Nullable final float [] aArray, @Nullable final float... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final float [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getAllExcept (@Nullable final int [] aArray, @Nullable final int... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final int [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static long [] getAllExcept (@Nullable final long [] aArray, @Nullable final long... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final long [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the passed elements.
*
* @param aArray
* The source array. May be null.
* @param aElementsToRemove
* The elements to skip.
* @return null if the passed array is null. The
* original array, if no elements need to be skipped. A non-
* null copy of the array without the passed elements
* otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static short [] getAllExcept (@Nullable final short [] aArray, @Nullable final short... aElementsToRemove)
{
if (isEmpty (aArray) || isEmpty (aElementsToRemove))
return aArray;
final short [] tmp = getCopy (aArray);
int nDst = 0;
for (int nSrc = 0; nSrc < tmp.length; ++nSrc)
if (!contains (aElementsToRemove, tmp[nSrc]))
tmp[nDst++] = tmp[nSrc];
return getCopy (tmp, 0, nDst);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getAllExceptFirst (@Nullable final boolean... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getAllExceptFirst (@Nullable final boolean [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getAllExceptFirst (@Nullable final byte... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getAllExceptFirst (@Nullable final byte [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static char [] getAllExceptFirst (@Nullable final char... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static char [] getAllExceptFirst (@Nullable final char [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static double [] getAllExceptFirst (@Nullable final double... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static double [] getAllExceptFirst (@Nullable final double [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static float [] getAllExceptFirst (@Nullable final float... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static float [] getAllExceptFirst (@Nullable final float [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getAllExceptFirst (@Nullable final int... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getAllExceptFirst (@Nullable final int [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static long [] getAllExceptFirst (@Nullable final long... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static long [] getAllExceptFirst (@Nullable final long [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the first element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the first element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static short [] getAllExceptFirst (@Nullable final short... aArray)
{
return getAllExceptFirst (aArray, 1);
}
/**
* Get an array that contains all elements, except for the first n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the first elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static short [] getAllExceptFirst (@Nullable final short [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, nElementsToSkip, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getAllExceptLast (@Nullable final ELEMENTTYPE... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static ELEMENTTYPE [] getAllExceptLast (@Nullable final ELEMENTTYPE [] aArray,
@Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getAllExceptLast (@Nullable final boolean... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static boolean [] getAllExceptLast (@Nullable final boolean [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getAllExceptLast (@Nullable final byte... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static byte [] getAllExceptLast (@Nullable final byte [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static char [] getAllExceptLast (@Nullable final char... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static char [] getAllExceptLast (@Nullable final char [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static double [] getAllExceptLast (@Nullable final double... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static double [] getAllExceptLast (@Nullable final double [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static float [] getAllExceptLast (@Nullable final float... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static float [] getAllExceptLast (@Nullable final float [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getAllExceptLast (@Nullable final int... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static int [] getAllExceptLast (@Nullable final int [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static long [] getAllExceptLast (@Nullable final long... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static long [] getAllExceptLast (@Nullable final long [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Get an array that contains all elements, except for the last element.
*
* @param aArray
* The source array. May be null.
* @return null if the passed array is null or has
* less than one element. A non-null copy of the array
* without the last element otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static short [] getAllExceptLast (@Nullable final short... aArray)
{
return getAllExceptLast (aArray, 1);
}
/**
* Get an array that contains all elements, except for the last n
* elements.
*
* @param aArray
* The source array. May be null.
* @param nElementsToSkip
* The number of elements to skip. Must be >= 0!
* @return null if the passed array is null or has
* ≤ elements than elements to be skipped. A non-null
* copy of the array without the last elements otherwise.
*/
@Nullable
@ReturnsMutableCopy
public static short [] getAllExceptLast (@Nullable final short [] aArray, @Nonnegative final int nElementsToSkip)
{
ValueEnforcer.isGE0 (nElementsToSkip, "ElementsToSkip");
if (nElementsToSkip == 0)
return aArray;
if (aArray == null || nElementsToSkip >= aArray.length)
return null;
return getCopy (aArray, 0, aArray.length - nElementsToSkip);
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static boolean [] newBooleanArray (@Nullable final boolean... aArray)
{
return aArray;
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static byte [] newByteArray (@Nullable final byte... aArray)
{
return aArray;
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static char [] newCharArray (@Nullable final char... aArray)
{
return aArray;
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static double [] newDoubleArray (@Nullable final double... aArray)
{
return aArray;
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static float [] newFloatArray (@Nullable final float... aArray)
{
return aArray;
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static int [] newIntArray (@Nullable final int... aArray)
{
return aArray;
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static long [] newLongArray (@Nullable final long... aArray)
{
return aArray;
}
/**
* Helper method to easily create an array from constant values.
*
* @param aArray
* The list of values for the array. May be null.
* @return The passed array. null if the passed array was
* null.
*/
@Nullable
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static short [] newShortArray (@Nullable final short... aArray)
{
return aArray;
}
@Nonnull
public static ELEMENTTYPE [] newArray (@Nonnull final Class aClass,
@Nonnegative final int nSize)
{
ValueEnforcer.notNull (aClass, "class");
if (aClass.isPrimitive ())
throw new IllegalArgumentException ("Argument cannot be primitive: " + aClass);
ValueEnforcer.isGE0 (nSize, "Size");
final Object aArray = Array.newInstance (aClass, nSize);
return GenericReflection. uncheckedCast (aArray);
}
/**
* Create a new empty array with the same type as the passed array.
*
* @param aArray
* Source array. May not be null.
* @param nSize
* Destination size. Must be ≥ 0.
* @return Never null.
*/
@Nonnull
public static ELEMENTTYPE [] newArraySameType (@Nonnull final ELEMENTTYPE [] aArray,
@Nonnegative final int nSize)
{
return newArray (getComponentType (aArray), nSize);
}
/**
* Create a new array with the elements in the passed collection..
*
* @param aCollection
* The collection to be converted to an array. May be null
* .
* @param aClass
* The class of the elements inside the collection. May not be
* null.
* @return null if the passed collection is empty, a non-
* null array with all elements of the collection
* otherwise.
*/
@Nonnull
@ReturnsMutableCopy
public static ELEMENTTYPE [] newArray (@Nullable final Collection aCollection,
@Nonnull final Class aClass)
{
ValueEnforcer.notNull (aClass, "class");
if (ContainerHelper.isEmpty (aCollection))
return newArray (aClass, 0);
final ELEMENTTYPE [] ret = newArray (aClass, aCollection.size ());
return aCollection.toArray (ret);
}
/**
* Wrapper that allows a single argument to be treated as an array.
*
* @param
* Type of element
* @param aElement
* The element to be converted to an array. May be null.
* @param aClass
* The class of the element. May not be null. Must be
* present because in case the passed element is null
* there is no way to determine the array component type!
* @return The created array and never null.
*/
@Nonnull
@ReturnsMutableCopy
public static ELEMENTTYPE [] newArraySingleElement (@Nullable final ELEMENTTYPE aElement,
@Nonnull final Class aClass)
{
ValueEnforcer.notNull (aClass, "class");
final ELEMENTTYPE [] ret = newArray (aClass, 1);
ret[0] = aElement;
return ret;
}
/**
* Wrapper that allows vararg arguments and returns the array.
* Note: this implementation is not available for basic types, because the
* Eclipse compiler seems to have difficulties resolving vararg types
* correctly.
*
* @param
* Type of element
* @param aArray
* The vararg array
* @return The wrapped array
*/
@Nonnull
@ReturnsMutableObject (reason = "use getCopy otherwise")
public static ELEMENTTYPE [] newArray (@Nonnull final ELEMENTTYPE... aArray)
{
ValueEnforcer.notNull (aArray, "Array");
return aArray;
}
/**
* Create a new array with a predefined number of elements containing the
* passed value.
*
* @param
* The type of the array to be created.
* @param nArraySize
* The size of the array to be created.
* @param aValue
* The value to be set into each array element. May be
* null.
* @param aClass
* The value class. May not be null. Must be present in
* case the passed value is null.
* @return The created array filled with the given value.
*/
@Nonnull
@ReturnsMutableCopy
public static ELEMENTTYPE [] newArray (@Nonnegative final int nArraySize,
@Nonnull final ELEMENTTYPE aValue,
@Nonnull final Class aClass)
{
ValueEnforcer.isGE0 (nArraySize, "ArraySize");
ValueEnforcer.notNull (aClass, "class");
final ELEMENTTYPE [] ret = newArray (aClass, nArraySize);
Arrays.fill (ret, aValue);
return ret;
}
/**
* Get the passed collection as an array of Object. If the passed collection
* is null or empty, an empty array is returned.
*
* @param aCollection
* The collection to be converted. May be null.
* @return Never null.
*/
@Nullable
@ReturnsMutableCopy
public static Object [] getAsObjectArray (@Nullable final Collection aCollection)
{
if (ContainerHelper.isEmpty (aCollection))
return null;
final Object [] ret = new Object [aCollection.size ()];
return aCollection.toArray (ret);
}
@Nullable
public static ELEMENTTYPE getSafeElement (@Nullable final ELEMENTTYPE [] aItems, final int nIndex)
{
return getSafeElement (aItems, nIndex, null);
}
@Nullable
public static ELEMENTTYPE getSafeElement (@Nullable final ELEMENTTYPE [] aItems,
final int nIndex,
@Nullable final ELEMENTTYPE aDefault)
{
return aItems != null && nIndex >= 0 && nIndex < aItems.length ? aItems[nIndex] : aDefault;
}
/**
* Recursive equal comparison for arrays.
*
* @param aHeadArray
* First array. May be null.
* @param aTailArray
* Second array. May be null.
* @return true only if the arrays and all contained elements are
* recursively equal.
*/
public static boolean isArrayEquals (@Nullable final Object aHeadArray, @Nullable final Object aTailArray)
{
// Same objects?
if (aHeadArray == aTailArray)
return true;
// Any of the null -> different because they are not both null
if (aHeadArray == null || aTailArray == null)
return false;
// If any of the passed object is not an array -> not equal as an array,
// even if they are equal!
if (!isArray (aHeadArray) || !isArray (aTailArray))
return false;
// Different component type?
if (!aHeadArray.getClass ().getComponentType ().equals (aTailArray.getClass ().getComponentType ()))
return false;
// Different length?
final int nLength = Array.getLength (aHeadArray);
if (nLength != Array.getLength (aTailArray))
return false;
// Compare step by step
for (int i = 0; i < nLength; i++)
{
final Object aItem1 = Array.get (aHeadArray, i);
final Object aItem2 = Array.get (aTailArray, i);
if (isArray (aItem1) && isArray (aItem2))
{
// Recursive call
if (!isArrayEquals (aItem1, aItem2))
return false;
}
else
{
// Use equals implementation
if (!EqualsUtils.equals (aItem1, aItem2))
return false;
}
}
// No differences found!
return true;
}
/**
* Check if the passed array contains at least one null element.
*
* @param aArray
* The array to check. May be null.
* @return true only if the passed array is neither
* null nor empty and if at least one null
* element is contained.
*/
public static boolean containsAnyNullElement (@Nullable final T [] aArray)
{
if (aArray != null)
for (final T aObj : aArray)
if (aObj == null)
return true;
return false;
}
/**
* Check if the passed array contains only null element.
*
* @param aArray
* The array to check. May be null.
* @return true only if the passed array is neither
* null nor empty and if at least one null
* element is contained.
*/
public static boolean containsOnlyNullElements (@Nullable final T [] aArray)
{
if (isEmpty (aArray))
return false;
for (final Object aObj : aArray)
if (aObj != null)
return false;
return true;
}
}
