/*******************************************************************************
 * ============LICENSE_START====================================================
 * * org.onap.aaf
 * * ===========================================================================
 * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * * ===========================================================================
 * * 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.
 * * ============LICENSE_END====================================================
 * *
 * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
 * *
 ******************************************************************************/
package org.onap.aaf.rosetta.marshal;

import java.util.Iterator;
import java.util.List;

/**
 * Need an Iterator that can peek the current value without changing
 *
 * @param <T>
 */
final class ListIterator<T> implements Iterator<T> {
	private T curr;
	private Iterator<T> delg;
	public ListIterator(List<T> list) {
		curr = null;
		delg = list.iterator(); 
	}
	@Override
	public boolean hasNext() {
		return delg.hasNext();
	}

	@Override
	public T next() {
		return curr = delg.hasNext()?delg.next():null;
	}
	
	public T peek() {
		return curr==null?next():curr;
	}

	@Override
	public void remove() {
		delg.remove();
	}
	
}