/**************************************************************************
* Copyright (c) 2001 by Punch Telematix. All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. *
* IN NO EVENT SHALL PUNCH TELEMATIX OR OTHER CONTRIBUTORS BE LIABLE *
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
/*
** $Id: WeakHashReference.java,v 1.1.1.1 2004/07/12 14:07:47 cvs Exp $
*/
package java.util;
import java.lang.ref.*;
class WeakHashReference extends java.lang.ref.WeakReference implements Map.Entry {
int hashValue;
Object value;
WeakHashReference(Object key, Object value, ReferenceQueue queue){
super(key, queue);
this.value = value;
hashValue = key.hashCode();
}
public synchronized boolean enqueue() {
value = null;
return super.enqueue();
}
public boolean equals (Object o) {
boolean answer = false;
if (o instanceof WeakHashReference) {
Object key = get();
if(key != null){
WeakHashReference e2 = (WeakHashReference)o;
answer = key.equals(e2.get()) && (value == null ? e2.value == null : value.equals(e2.value));
}
}
return answer;
}
public int hashCode() {
return hashValue ^ (value==null ? 0 : value.hashCode());
}
public Object getKey() {
Object key = get();
return (key == WeakHashMap.nullKey ? null : key);
}
public Object getValue() {
return this.value;
}
public Object setValue(Object o) {
Object oldval = value;
value = o;
return oldval;
}
}