com.helger.json.IJsonArray Maven / Gradle / Ivy
/**
* Copyright (C) 2014-2020 Philip Helger (www.helger.com)
* philip[at]helger[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.helger.json;
import java.util.function.ObjIntConsumer;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import com.helger.commons.annotation.ReturnsMutableCopy;
import com.helger.commons.collection.impl.ICommonsIterable;
import com.helger.commons.collection.impl.ICommonsList;
import com.helger.commons.collection.iterate.FilterIterator;
import com.helger.commons.collection.iterate.IIterableIterator;
import com.helger.commons.collection.iterate.MapperIterator;
import com.helger.commons.state.EChange;
import com.helger.commons.traits.IGenericAdderTrait;
import com.helger.commons.traits.IGetterByIndexTrait;
import com.helger.commons.traits.IPrimitiveConverterTo;
/**
* JSON array.
*
* @author Philip Helger
*/
public interface IJsonArray extends IJsonCollection, ICommonsIterable , IGetterByIndexTrait, IGenericAdderTrait
{
@Nonnull
default IPrimitiveConverterTo getPrimitiveConverterTo ()
{
return PrimitiveConvererToIJson.INSTANCE;
}
@Nullable
IJson removeAndReturnAtIndex (@Nonnegative int nIndex);
@Nonnull
EChange removeAtIndex (@Nonnegative int nIndex);
/**
* Get the element at the specified index.
*
* @param nIndex
* The index to retrieve.
* @return null if the index is invalid.
*/
@Nullable
IJson get (@Nonnegative int nIndex);
/**
* Get the element at the specified index. This is the {@link IJsonValue}
* specific version of {@link #get(int)}.
*
* @param nIndex
* The index to retrieve.
* @return null if the index is invalid or if the value is not a
* {@link IJsonValue}.
*/
@Nullable
default IJsonValue getValueAtIndex (@Nonnegative final int nIndex)
{
final IJson aJson = get (nIndex);
return aJson != null && aJson.isValue () ? (IJsonValue) aJson : null;
}
/**
* Get the element at the specified index. This is the {@link IJsonArray}
* specific version of {@link #get(int)}.
*
* @param nIndex
* The index to retrieve.
* @return null if the index is invalid or if the value is not a
* {@link IJsonArray}.
*/
@Nullable
default IJsonArray getArrayAtIndex (@Nonnegative final int nIndex)
{
final IJson aJson = get (nIndex);
return aJson != null && aJson.isArray () ? (IJsonArray) aJson : null;
}
/**
* Get the element at the specified index. This is the {@link IJsonObject}
* specific version of {@link #get(int)}.
*
* @param nIndex
* The index to retrieve.
* @return null if the index is invalid or if the value is not a
* {@link IJsonObject}.
*/
@Nullable
default IJsonObject getObjectAtIndex (@Nonnegative final int nIndex)
{
final IJson aJson = get (nIndex);
return aJson != null && aJson.isObject () ? (IJsonObject) aJson : null;
}
/**
* Get the plain Object value of the element at the specified index. If the
* element at the specified index is not a Json value, null is
* returned.
*
* @param nIndex
* The index to retrieve.
* @return null if the index is invalid or if the value is not a
* {@link IJsonValue}.
*/
@Nullable
default Object getValue (@Nonnegative final int nIndex)
{
final IJson aJson = get (nIndex);
return aJson != null && aJson.isValue () ? aJson.getAsValue ().getValue () : null;
}
/**
* Get a sub array of this array from the specified start index (incl.) up to
* the specified end index (excl.).
*
* @param nStartIndex
* The start index. Must be ≥ 0.
* @param nEndIndex
* The end index. Must be ≥ start index.
* @return A non-null JSON array.
*/
@Nonnull
@ReturnsMutableCopy
IJsonArray getSubArray (@Nonnegative int nStartIndex, @Nonnegative int nEndIndex);
/**
* @return A copy of all contained items. Never null but maybe
* empty.
*/
@Nonnull
@ReturnsMutableCopy
ICommonsList getAll ();
/**
* Invoke the passed consumer on all entries of this array.
*
* @param aConsumer
* Consumer with the first param being the value and second param being
* the 0-based index.
*/
@Override
void forEachByIndex (@Nonnull ObjIntConsumer aConsumer);
/**
* Check if the passed value is directly contained in the array or not.
*
* @param aValue
* The value to be checked for containment. May be null.
* @return true if the value is contained, false if
* not.
*/
boolean contains (@Nullable IJson aValue);
/**
* Check if the passed value is directly contained in the array or not.
*
* @param aValue
* The value to be checked for containment. May be null.
* @return true if the value is contained, false if
* not.
*/
default boolean contains (@Nullable final Object aValue)
{
return contains (JsonValue.create (aValue));
}
/**
* Check if the passed value is directly contained in the array or not.
*
* @param bValue
* The value to be checked for containment.
* @return true if the value is contained, false if
* not.
*/
default boolean contains (final boolean bValue)
{
return contains (JsonValue.create (bValue));
}
/**
* Check if the passed value is directly contained in the array or not.
*
* @param cValue
* The value to be checked for containment.
* @return true if the value is contained, false if
* not.
*/
default boolean contains (final char cValue)
{
return contains (JsonValue.create (cValue));
}
/**
* Check if the passed value is directly contained in the array or not.
*
* @param dValue
* The value to be checked for containment.
* @return true if the value is contained, false if
* not.
*/
default boolean contains (final double dValue)
{
return contains (JsonValue.create (dValue));
}
/**
* Check if the passed value is directly contained in the array or not.
*
* @param nValue
* The value to be checked for containment.
* @return true if the value is contained, false if
* not.
*/
default boolean contains (final int nValue)
{
return contains (JsonValue.create (nValue));
}
/**
* Check if the passed value is directly contained in the array or not.
*
* @param nValue
* The value to be checked for containment.
* @return true if the value is contained, false if
* not.
*/
default boolean contains (final long nValue)
{
return contains (JsonValue.create (nValue));
}
/**
* @return An iterator that only iterates over child arrays.
* @since 9.4.7
*/
@Nonnull
default IIterableIterator iteratorArrays ()
{
return new MapperIterator <> (new FilterIterator <> (this, IJson::isArray), IJson::getAsArray);
}
/**
* @return An iterator that only iterates over child objects.
* @since 9.4.7
*/
@Nonnull
default IIterableIterator iteratorObjects ()
{
return new MapperIterator <> (new FilterIterator <> (this, IJson::isObject), IJson::getAsObject);
}
/**
* @return An iterator that only iterates over child values.
* @since 9.4.7
*/
@Nonnull
default IIterableIterator iteratorValues ()
{
return new MapperIterator <> (new FilterIterator <> (this, IJson::isValue), IJson::getAsValue);
}
/**
* @return A list of all cloned values contained in this array. Never
* null.
*/
@Nonnull
@ReturnsMutableCopy
ICommonsList getClonedValues ();
@Nonnull
IJsonArray getClone ();
}