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/*
 * Java Genetic Algorithm Library (jenetics-3.1.0).
 * Copyright (c) 2007-2015 Franz Wilhelmstötter
 *
 * 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.
 *
 * Author:
 *    Franz Wilhelmstötter ([email protected])
 */
package org.jenetics.internal.collection;

import static java.util.Spliterator.IMMUTABLE;
import static java.util.Spliterator.ORDERED;

import java.util.Arrays;
import java.util.Spliterators;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

/**
 * {@code ArrayProxy} implementation which stores {@code Object}s.
 *
 * @author Franz Wilhelmstötter
 * @since 1.4
 * @version 3.0
 */
public final class ObjectArrayProxy
	extends ArrayProxy>
{

	private static final long serialVersionUID = 1L;

	/**
	 * Create a new array proxy implementation.
	 *
	 * @param array the array where the elements are stored.
	 * @param start the start index of the array proxy, inclusively.
	 * @param end the end index of the array proxy, exclusively.
	 */
	public ObjectArrayProxy(
		final Object[] array,
		final int start, final int end
	) {
		super(array, start, end, ObjectArrayProxy::new, Arrays::copyOfRange);
	}

	/**
	 * Create a new array proxy implementation.
	 *
	 * @param length the length of the array proxy.
	 */
	public ObjectArrayProxy(final int length) {
		this(new Object[length], 0, length);
	}

	@Override
	@SuppressWarnings("unchecked")
	public T __get__(final int index) {
		return (T)array[index];
	}

	@Override
	public void __set__(final int index, final T value) {
		array[index] = value;
	}

	@Override
	public Stream stream() {
		return StreamSupport.stream(
			Spliterators.spliterator(array, start, end, ORDERED|IMMUTABLE),
			false
		);
	}

	@Override
	public Stream parallelStream() {
		return StreamSupport.stream(
			Spliterators.spliterator(array, start, end, ORDERED|IMMUTABLE),
			true
		);
	}
}