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/*
* Sun Public License Notice
*
* The contents of this file are subject to the Sun Public License
* Version 1.0 (the "License"). You may not use this file except in
* compliance with the License. A copy of the License is available at
* http://www.sun.com/
*
* The Original Code is NetBeans. The Initial Developer of the Original
* Code is Sun Microsystems, Inc. Portions Copyright 1997-2004 Sun
* Microsystems, Inc. All Rights Reserved.
*/
package org.openide.util.enum;
import java.util.Enumeration;
import java.util.NoSuchElementException;
/**
* The class that encapsulates one object into one element enumeration.
* @deprecated JDK 1.5 treats enum as a keyword so this class was
* replaced by {@link org.openide.util.Enumerations#singleton}.
* @author Jaroslav Tulach
*/
public class SingletonEnumeration implements Enumeration {
/** object to return */
private Object object;
/** @param object object to be put into the enumeration
*/
public SingletonEnumeration (Object object) {
this.object = object;
}
/** Tests if this enumeration contains next element.
* @return true if this enumeration contains it
* false otherwise.
*/
public boolean hasMoreElements() {
return object != null;
}
/** Returns the next element of this enumeration.
* @return the next element of this enumeration.
* @exception NoSuchElementException if no more elements exist.
*/
public synchronized Object nextElement() {
if (object == null) {
throw new NoSuchElementException();
} else {
Object o = object;
object = null;
return o;
}
}
}