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Commons Collections example source code file (ProxyListIterator.java)

This example Commons Collections source code file (ProxyListIterator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

listiterator, listiterator, object, object, proxylistiterator, proxylistiterator, util

The Commons Collections ProxyListIterator.java source code

/*
 *  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.apache.commons.collections.iterators;

import java.util.ListIterator;

/**
 * A proxy {@link ListIterator ListIterator} which delegates its
 * methods to a proxy instance.
 *
 * @deprecated Use AbstractListIteratorDecorator. Will be removed in v4.0
 * @since Commons Collections 2.0
 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Rodney Waldhoff
 */
public class ProxyListIterator implements ListIterator {

    /** Holds value of property "iterator". */
    private ListIterator iterator;

    // Constructors
    //-------------------------------------------------------------------------

    /**
     * Constructs a new <code>ProxyListIterator that will not 
     * function until {@link #setListIterator(ListIterator) setListIterator}
     * is invoked.
     */
    public ProxyListIterator() {
        super();
    }

    /**
     * Constructs a new <code>ProxyListIterator that will use the
     * given list iterator.
     *
     * @param iterator  the list iterator to use
     */
    public ProxyListIterator(ListIterator iterator) {
        super();
        this.iterator = iterator;
    }

    // ListIterator interface
    //-------------------------------------------------------------------------

    /**
     *  Invokes the underlying {@link ListIterator#add(Object)} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public void add(Object o) {
        getListIterator().add(o);
    }

    /**
     *  Invokes the underlying {@link ListIterator#hasNext()} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public boolean hasNext() {
        return getListIterator().hasNext();
    }

    /**
     *  Invokes the underlying {@link ListIterator#hasPrevious()} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public boolean hasPrevious() {
        return getListIterator().hasPrevious();
    }

    /**
     *  Invokes the underlying {@link ListIterator#next()} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public Object next() {
        return getListIterator().next();
    }

    /**
     *  Invokes the underlying {@link ListIterator#nextIndex()} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public int nextIndex() {
        return getListIterator().nextIndex();
    }

    /**
     *  Invokes the underlying {@link ListIterator#previous()} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public Object previous() {
        return getListIterator().previous();
    }

    /**
     *  Invokes the underlying {@link ListIterator#previousIndex()} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public int previousIndex() {
        return getListIterator().previousIndex();
    }

    /**
     *  Invokes the underlying {@link ListIterator#remove()} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public void remove() {
        getListIterator().remove();
    }

    /**
     *  Invokes the underlying {@link ListIterator#set(Object)} method.
     *
     *  @throws NullPointerException  if the underlying iterator is null
     */
    public void set(Object o) {
        getListIterator().set(o);
    }

    // Properties
    //-------------------------------------------------------------------------

    /** 
     * Getter for property iterator.
     * @return Value of property iterator.
     */
    public ListIterator getListIterator() {
        return iterator;
    }

    /**
     * Setter for property iterator.
     * @param iterator New value of property iterator.
     */
    public void setListIterator(ListIterator iterator) {
        this.iterator = iterator;
    }

}

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