/*
* 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.Enumeration;
import java.util.Iterator;
/**
* Adapter to make an {@link Iterator Iterator} instance appear to be
* an {@link Enumeration Enumeration} instance.
*
* @since Commons Collections 1.0
* @version $Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
*/
public class IteratorEnumeration implements Enumeration {
/** The iterator being decorated. */
private Iterator iterator;
/**
* Constructs a new <code>IteratorEnumeration</code> that will not
* function until {@link #setIterator(Iterator) setIterator} is
* invoked.
*/
public IteratorEnumeration() {
super();
}
/**
* Constructs a new <code>IteratorEnumeration</code> that will use
* the given iterator.
*
* @param iterator the iterator to use
*/
public IteratorEnumeration( Iterator iterator ) {
super();
this.iterator = iterator;
}
// Iterator interface
//-------------------------------------------------------------------------
/**
* Returns true if the underlying iterator has more elements.
*
* @return true if the underlying iterator has more elements
*/
public boolean hasMoreElements() {
return iterator.hasNext();
}
/**
* Returns the next element from the underlying iterator.
*
* @return the next element from the underlying iterator.
* @throws java.util.NoSuchElementException if the underlying iterator has no
* more elements
*/
public Object nextElement() {
return iterator.next();
}
// Properties
//-------------------------------------------------------------------------
/**
* Returns the underlying iterator.
*
* @return the underlying iterator
*/
public Iterator getIterator() {
return iterator;
}
/**
* Sets the underlying iterator.
*
* @param iterator the new underlying iterator
*/
public void setIterator( Iterator iterator ) {
this.iterator = iterator;
}
}