Hash


1   /*******************************************************************************
2    * Copyright (c) 2005, 2006 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    *
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.ui.internal.texteditor.quickdiff.compare.equivalence;
12  
13  /**
14   * Value objects. Subclasses must override <code>equals</code> and are
15   * typically <code>final</code>.
16   * 
17   * @since 3.2
18   */
19  public abstract class Hash implements Cloneable   {
20      
21      public Object   clone() {
22          try {
23              return super.clone();
24          } catch (CloneNotSupportedException   x) {
25              throw new AssertionError  (x);
26          }
27      }
28      
29      /**
30       * Returns <code>true</code> if the two hashes are equal,
31       * <code>false</code> if not. Subclasses must override.
32       * 
33       * @param obj {@inheritDoc}
34       * @return <code>true</code> if the receiver is equal to <code>obj</code>
35       */
36      public abstract boolean equals(Object   obj);
37  
38  }

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