01: /*
02: * The Apache Software License, Version 1.1
03: *
04: * Copyright (c) 1999 The Apache Software Foundation. All rights
05: * reserved.
06: *
07: * Redistribution and use in source and binary forms, with or without
08: * modification, are permitted provided that the following conditions
09: * are met:
10: *
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: *
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in
16: * the documentation and/or other materials provided with the
17: * distribution.
18: *
19: * 3. The end-user documentation included with the redistribution, if
20: * any, must include the following acknowlegement:
21: * "This product includes software developed by the
22: * Apache Software Foundation (http://www.apache.org/)."
23: * Alternately, this acknowlegement may appear in the software itself,
24: * if and wherever such third-party acknowlegements normally appear.
25: *
26: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
27: * Foundation" must not be used to endorse or promote products derived
28: * from this software without prior written permission. For written
29: * permission, please contact apache@apache.org.
30: *
31: * 5. Products derived from this software may not be called "Apache"
32: * nor may "Apache" appear in their names without prior written
33: * permission of the Apache Group.
34: *
35: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46: * SUCH DAMAGE.
47: * ====================================================================
48: *
49: * This software consists of voluntary contributions made by many
50: * individuals on behalf of the Apache Software Foundation. For more
51: * information on the Apache Software Foundation, please see
52: * <http://www.apache.org/>.
53: *
54: */
55:
56: package org.apache.commons.el;
57:
58: import javax.servlet.jsp.el.ELException;
59:
60: /**
61: *
62: * <p>This is the superclass for all equality operators (==, !=)
63: *
64: * @author Nathan Abramson - Art Technology Group
65: * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
66: **/
67:
68: public abstract class EqualityOperator extends BinaryOperator {
69: //-------------------------------------
70: /**
71: *
72: * Applies the operator to the given value
73: **/
74: public Object apply(Object pLeft, Object pRight, Logger pLogger)
75: throws ELException {
76: return Coercions.applyEqualityOperator(pLeft, pRight, this ,
77: pLogger);
78: }
79:
80: //-------------------------------------
81: /**
82: *
83: * Applies the operator given the fact that the two elements are
84: * equal.
85: **/
86: public abstract boolean apply(boolean pAreEqual, Logger pLogger);
87:
88: //-------------------------------------
89: }
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