/*******************************************************************************
* Copyright (c) 2005, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.texteditor.quickdiff.compare.equivalence;
/**
* Value objects. Subclasses must override <code>equals</code> and are
* typically <code>final</code>.
*
* @since 3.2
*/
public abstract class Hash implements Cloneable {
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException x) {
throw new AssertionError(x);
}
}
/**
* Returns <code>true</code> if the two hashes are equal,
* <code>false</code> if not. Subclasses must override.
*
* @param obj {@inheritDoc}
* @return <code>true</code> if the receiver is equal to <code>obj</code>
*/
public abstract boolean equals(Object obj);
/**
* @see java.lang.Object#hashCode()
* @since 3.5
*/
public abstract int hashCode();
}