EqualityOperator


1   /*
2    * Copyright 1999-2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */ 
16  
17  package org.apache.taglibs.standard.lang.jstl;
18  
19  /**
20   *
21   * <p>This is the superclass for all equality operators (==, !=)
22   * 
23   * @author Nathan Abramson - Art Technology Group
24   * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: pierred $
25   **/
26  
27  public abstract class EqualityOperator
28    extends BinaryOperator
29  {
30    //-------------------------------------
31    /**
32     *
33     * Applies the operator to the given value
34     **/
35    public Object   apply (Object   pLeft,
36                 Object   pRight,
37                 Object   pContext,
38                 Logger pLogger)
39      throws ELException
40    {
41      return Coercions.applyEqualityOperator (pLeft, pRight, this, pLogger);
42    }
43  
44    //-------------------------------------
45    /**
46     *
47     * Applies the operator given the fact that the two elements are
48     * equal.
49     **/
50    public abstract boolean apply (boolean pAreEqual,
51                   Logger pLogger);
52    
53    //-------------------------------------
54  }
55

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