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/* Glazed Lists (c) 2003-2006 */
/* http://publicobject.com/glazedlists/ publicobject.com,*/
/* O'Dell Engineering Ltd.*/
package ca.odell.glazedlists.impl;
import java.util.Enumeration;
import java.util.Iterator;
/**
* This simple class adapts a given {@link Iterator} to the Enumeration
* interface. It is useful when implementing existing JDK interfaces backed by
* EventLists which must return Enumerations.
*
* @author James Lemieux
*/
public final class IteratorAsEnumeration<E> implements Enumeration<E> {
/** The delegate Iterator which appears to be an Enumeration to the world. */
private final Iterator<? extends E> iterator;
/**
* Construct an Enumeration which is backed by the given
* <code>iterator</code>.
*
* @throws IllegalArgumentException if <code>iterator</code> is <tt>null</tt>
*/
public IteratorAsEnumeration(Iterator<? extends E> iterator) {
if (iterator == null)
throw new IllegalArgumentException("iterator may not be null");
this.iterator = iterator;
}
/** @inheritDoc */
public boolean hasMoreElements() {
return iterator.hasNext();
}
/** @inheritDoc */
public E nextElement() {
return iterator.next();
}
}
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