RelationalOperator


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 relational operators (except ==
22   * or !=)
23   * 
24   * @author Nathan Abramson - Art Technology Group
25   * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: pierred $
26   **/
27  
28  public abstract class RelationalOperator
29    extends BinaryOperator
30  {
31    //-------------------------------------
32    /**
33     *
34     * Applies the operator to the given value
35     **/
36    public Object   apply (Object   pLeft,
37                 Object   pRight,
38                 Object   pContext,
39                 Logger pLogger)
40      throws ELException
41    {
42      return Coercions.applyRelationalOperator (pLeft, pRight, this, pLogger);
43    }
44  
45    //-------------------------------------
46    /**
47     *
48     * Applies the operator to the given double values
49     **/
50    public abstract boolean apply (double pLeft,
51                   double pRight,
52                   Logger pLogger);
53    
54    //-------------------------------------
55    /**
56     *
57     * Applies the operator to the given long values
58     **/
59    public abstract boolean apply (long pLeft,
60                   long pRight,
61                   Logger pLogger);
62    
63    //-------------------------------------
64    /**
65     *
66     * Applies the operator to the given String values
67     **/
68    public abstract boolean apply (String   pLeft,
69                   String   pRight,
70                   Logger pLogger);
71  
72    //-------------------------------------
73  }
74
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