org.dinky.shaded.paimon.utils.ArrayUtils Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.dinky.shaded.paimon.utils;
/** Utils for array. */
public class ArrayUtils {
/** An empty immutable {@code String} array. */
public static final String[] EMPTY_STRING_ARRAY = new String[0];
/** An empty immutable {@code long} array. */
public static final long[] EMPTY_LONG_ARRAY = new long[0];
/** An empty immutable {@code Long} array. */
public static final Long[] EMPTY_LONG_OBJECT_ARRAY = new Long[0];
/** An empty immutable {@code int} array. */
public static final int[] EMPTY_INT_ARRAY = new int[0];
/** An empty immutable {@code Integer} array. */
public static final Integer[] EMPTY_INTEGER_OBJECT_ARRAY = new Integer[0];
/** An empty immutable {@code short} array. */
public static final short[] EMPTY_SHORT_ARRAY = new short[0];
/** An empty immutable {@code Short} array. */
public static final Short[] EMPTY_SHORT_OBJECT_ARRAY = new Short[0];
/** An empty immutable {@code byte} array. */
public static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
/** An empty immutable {@code Byte} array. */
public static final Byte[] EMPTY_BYTE_OBJECT_ARRAY = new Byte[0];
/** An empty immutable {@code double} array. */
public static final double[] EMPTY_DOUBLE_ARRAY = new double[0];
/** An empty immutable {@code Double} array. */
public static final Double[] EMPTY_DOUBLE_OBJECT_ARRAY = new Double[0];
/** An empty immutable {@code float} array. */
public static final float[] EMPTY_FLOAT_ARRAY = new float[0];
/** An empty immutable {@code Float} array. */
public static final Float[] EMPTY_FLOAT_OBJECT_ARRAY = new Float[0];
/** An empty immutable {@code boolean} array. */
public static final boolean[] EMPTY_BOOLEAN_ARRAY = new boolean[0];
/** An empty immutable {@code Boolean} array. */
public static final Boolean[] EMPTY_BOOLEAN_OBJECT_ARRAY = new Boolean[0];
private ArrayUtils() {}
/**
* Converts an array of primitive booleans to objects.
*
* This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code boolean} array
* @return a {@code Boolean} array, {@code null} if null array input
*/
public static Boolean[] toObject(final boolean[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_BOOLEAN_OBJECT_ARRAY;
}
final Boolean[] result = new Boolean[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (array[i] ? Boolean.TRUE : Boolean.FALSE);
}
return result;
}
/**
* Converts an array of primitive bytes to objects.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code byte} array
* @return a {@code Byte} array, {@code null} if null array input
*/
public static Byte[] toObject(final byte[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_BYTE_OBJECT_ARRAY;
}
final Byte[] result = new Byte[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
}
/**
* Converts an array of primitive doubles to objects.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code double} array
* @return a {@code Double} array, {@code null} if null array input
*/
public static Double[] toObject(final double[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_DOUBLE_OBJECT_ARRAY;
}
final Double[] result = new Double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
}
/**
* Converts an array of primitive floats to objects.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code float} array
* @return a {@code Float} array, {@code null} if null array input
*/
public static Float[] toObject(final float[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_FLOAT_OBJECT_ARRAY;
}
final Float[] result = new Float[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
}
/**
* Converts an array of primitive ints to objects.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array an {@code int} array
* @return an {@code Integer} array, {@code null} if null array input
*/
public static Integer[] toObject(final int[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_INTEGER_OBJECT_ARRAY;
}
final Integer[] result = new Integer[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
}
/**
* Converts an array of primitive longs to objects.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code long} array
* @return a {@code Long} array, {@code null} if null array input
*/
public static Long[] toObject(final long[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_LONG_OBJECT_ARRAY;
}
final Long[] result = new Long[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
}
/**
* Converts an array of primitive shorts to objects.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code short} array
* @return a {@code Short} array, {@code null} if null array input
*/
public static Short[] toObject(final short[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_SHORT_OBJECT_ARRAY;
}
final Short[] result = new Short[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
return result;
}
/**
* Converts an array of object Booleans to primitives.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code Boolean} array, may be {@code null}
* @return a {@code boolean} array, {@code null} if null array input
* @throws NullPointerException if array content is {@code null}
*/
public static boolean[] toPrimitiveBoolean(final Object[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_BOOLEAN_ARRAY;
}
final boolean[] result = new boolean[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (boolean) array[i];
}
return result;
}
/**
* Converts an array of object Bytes to primitives.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code Byte} array, may be {@code null}
* @return a {@code byte} array, {@code null} if null array input
* @throws NullPointerException if array content is {@code null}
*/
public static byte[] toPrimitiveByte(final Object[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_BYTE_ARRAY;
}
final byte[] result = new byte[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (byte) array[i];
}
return result;
}
/**
* Converts an array of object Doubles to primitives.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code Double} array, may be {@code null}
* @return a {@code double} array, {@code null} if null array input
* @throws NullPointerException if array content is {@code null}
*/
public static double[] toPrimitiveDouble(final Object[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_DOUBLE_ARRAY;
}
final double[] result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (double) array[i];
}
return result;
}
/**
* Converts an array of object Floats to primitives.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code Float} array, may be {@code null}
* @return a {@code float} array, {@code null} if null array input
* @throws NullPointerException if array content is {@code null}
*/
public static float[] toPrimitiveFloat(final Object[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_FLOAT_ARRAY;
}
final float[] result = new float[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (float) array[i];
}
return result;
}
/**
* Converts an array of object Integers to primitives.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code Integer} array, may be {@code null}
* @return an {@code int} array, {@code null} if null array input
* @throws NullPointerException if array content is {@code null}
*/
public static int[] toPrimitiveInteger(final Object[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_INT_ARRAY;
}
final int[] result = new int[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (int) array[i];
}
return result;
}
/**
* Converts an array of object Longs to primitives.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code Long} array, may be {@code null}
* @return a {@code long} array, {@code null} if null array input
* @throws NullPointerException if array content is {@code null}
*/
public static long[] toPrimitiveLong(final Object[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_LONG_ARRAY;
}
final long[] result = new long[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (long) array[i];
}
return result;
}
/**
* Converts an array of object Shorts to primitives.
*
*
This method returns {@code null} for a {@code null} input array.
*
* @param array a {@code Short} array, may be {@code null}
* @return a {@code byte} array, {@code null} if null array input
* @throws NullPointerException if array content is {@code null}
*/
public static short[] toPrimitiveShort(final Object[] array) {
if (array == null) {
return null;
} else if (array.length == 0) {
return EMPTY_SHORT_ARRAY;
}
final short[] result = new short[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = (short) array[i];
}
return result;
}
}