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/*
* Copyright 1999-2004 The Apache Software Foundation
*
* 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 org.apache.commons.collections.iterators;
import java.util.ListIterator;
/**
* A proxy {@link ListIterator ListIterator} which delegates its
* methods to a proxy instance.
*
* @since 2.0
* @see ProxyIterator
* @version $Revision: 1.1.2.1 $ $Date: 2004/05/22 12:14:04 $
* @author Rodney Waldhoff
*/
public class ProxyListIterator implements ListIterator {
// Constructor
//-------------------------------------------------------------------------
/**
* Constructs a new ProxyListIterator that will not
* function until {@link #setListIterator(ListIterator) setListIterator}
* is invoked.
*/
public ProxyListIterator() {
}
/**
* Constructs a new ProxyListIterator that will use the
* given list iterator.
*
* @param iterator the list iterator to use
*/
public ProxyListIterator(ListIterator iterator) {
this.iterator = iterator;
}
// ListIterator interface
//-------------------------------------------------------------------------
/**
* Invokes the underlying {@link ListIterator#add(Object)} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public void add(Object o) {
getListIterator().add(o);
}
/**
* Invokes the underlying {@link ListIterator#hasNext()} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public boolean hasNext() {
return getListIterator().hasNext();
}
/**
* Invokes the underlying {@link ListIterator#hasPrevious()} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public boolean hasPrevious() {
return getListIterator().hasPrevious();
}
/**
* Invokes the underlying {@link ListIterator#next()} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public Object next() {
return getListIterator().next();
}
/**
* Invokes the underlying {@link ListIterator#nextIndex()} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public int nextIndex() {
return getListIterator().nextIndex();
}
/**
* Invokes the underlying {@link ListIterator#previous()} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public Object previous() {
return getListIterator().previous();
}
/**
* Invokes the underlying {@link ListIterator#previousIndex()} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public int previousIndex() {
return getListIterator().previousIndex();
}
/**
* Invokes the underlying {@link ListIterator#remove()} method.
*
* @throws NullPointerException if the underyling iterator is null
*/
public void remove() {
getListIterator().remove();
}
/**
* Invokes the underlying {@link ListIterator#set(Object)} method.
*
* @throws NullPointerException if the underyling 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;
}
// Attributes
//-------------------------------------------------------------------------
/** Holds value of property "iterator". */
private ListIterator iterator;
}