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Java > Open Source Codes > org > eclipse > jface > bindings > Trigger


1 /*******************************************************************************
2  * Copyright (c) 2004, 2005 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.jface.bindings;
12
13 /**
14  * <p>
15  * The abstract class for any object that can be used as a trigger for a binding.
16  * This ensures that trigger conform to certain minimum requirements. Namely, triggers
17  * need to be hashable.
18  * </p>
19  *
20  * @since 3.1
21  */
22 public abstract class Trigger implements Comparable JavaDoc {
23
24     /**
25      * Tests whether this object is equal to another object. A handle object is
26      * only equal to another trigger with the same properties.
27      *
28      * @param object
29      * The object with which to compare; may be <code>null</code>.
30      * @return <code>true</code> if the objects are equal; <code>false</code>
31      * otherwise.
32      */
33     public abstract boolean equals(final Object JavaDoc object);
34
35     /**
36      * Computes the hash code for this object.
37      *
38      * @return The hash code for this object.
39      */
40     public abstract int hashCode();
41 }
42
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