/*
* Copyright 2006 Edward Kuns
*
* 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.
*
* $Id: SafeStack.java 0000 2006-12-21 22:00:00Z ekuns $
*/
package org.exolab.castor.util;
import java.util.Stack;
/**
* The {@link Stack#search} method of {@link Stack} can throw a
* ClassCastException if the items on the stack are not all the same type. We
* override that method so it compares on identity and not using
* <code>equals()</code>.
*
* @author <a href="mailto:edward.kuns@aspect.com">Edward Kuns</a>
* @version $Revision: 0000 $ $Date: $
*/
public class SafeStack<E> extends Stack<E> {
/**
* Serial Version UID.
*/
private static final long serialVersionUID = 4964881847051572321L;
/**
* {@inheritDoc}
* <br/>
* Searches for the given Object in the stack and returns its position
* relative to the top of the Stack (ie the number of calls to #pop()
* before the object is returned by #pop())
*/
public synchronized int search(Object object) {
for (int i = 0; i < size(); i++) {
if (object == get(i)) {
return i + 1;
}
}
return -1;
}
}