DoubleLinkedListIterator.java

/*******************************************************************************
 * Copyright (c) 2015
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *******************************************************************************/
package jsettlers.common.utils.collections.list;

import java.util.Iterator;

/**
 * {@link Iterator} implementation for the {@link DoubleLinkedList} class.
 * 
 * @author Andreas Eberle
 * 
 * @param <T>
 */
class DoubleLinkedListIterator<T extends DoubleLinkedListItem<T>> implements Iterator<T> {

	private final DoubleLinkedList<T> list;
	private T next;

	public DoubleLinkedListIterator(DoubleLinkedList<T> list) {
		this.list = list;
		this.next = list.head.next;
	}

	@Override
	public boolean hasNext() {
		return next != list.head;
	}

	@Override
	public T next() {
		T currNext = next;
		next = next.next;
		return currNext;
	}

	@Override
	public void remove() {
		list.remove(next.prev);
	}
}