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1   /*
2    * $Header$
3    * $Revision: 1277 $
4    * $Date: 2007-01-05 10:25:43 -0800 (Fri, 05 Jan 2007) $
5    *
6    * ====================================================================
7    *
8    * Copyright 2000-2002 bob mcwhirter & James Strachan.
9    * All rights reserved.
10   *
11   * Redistribution and use in source and binary forms, with or without
12   * modification, are permitted provided that the following conditions are
13   * met:
14   * 
15   *   * Redistributions of source code must retain the above copyright
16   *     notice, this list of conditions and the following disclaimer.
17   * 
18   *   * Redistributions in binary form must reproduce the above copyright
19   *     notice, this list of conditions and the following disclaimer in the
20   *     documentation and/or other materials provided with the distribution.
21   * 
22   *   * Neither the name of the Jaxen Project nor the names of its
23   *     contributors may be used to endorse or promote products derived 
24   *     from this software without specific prior written permission.
25   * 
26   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
29   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
30   * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37   *
38   * ====================================================================
39   * This software consists of voluntary contributions made by many 
40   * individuals on behalf of the Jaxen Project and was originally 
41   * created by bob mcwhirter <bob@werken.com> and 
42   * James Strachan <jstrachan@apache.org>.  For more information on the 
43   * Jaxen Project, please see <http://www.jaxen.org/>.
44   * 
45   * $Id: DefaultBinaryExpr.java 1277 2007-01-05 18:25:43Z elharo $
46   */
47  
48  
49  
50  package org.jaxen.expr;
51  
52  abstract class DefaultBinaryExpr extends DefaultExpr implements BinaryExpr
53  {
54      private Expr lhs;
55      private Expr rhs;
56  
57      DefaultBinaryExpr(Expr lhs, Expr rhs)
58      {
59          this.lhs = lhs;
60          this.rhs = rhs;
61      }
62  
63      public Expr getLHS()
64      {
65          return this.lhs;
66      }
67  
68      public Expr getRHS()
69      {
70          return this.rhs;
71      }
72  
73      public void setLHS(Expr lhs)
74      {
75          this.lhs = lhs;
76      }
77  
78      public void setRHS(Expr rhs)
79      {
80          this.rhs = rhs;
81      }
82  
83      public abstract String getOperator();
84  
85      public String getText()
86      {
87          return "(" + getLHS().getText() + " " + getOperator() + " " + getRHS().getText() +")";
88      }
89  
90      public String toString()
91      {
92          return "[" + getClass().getName() + ": " + getLHS() + ", " + getRHS() + "]";
93      }
94  
95      public Expr simplify()
96      {
97          setLHS( getLHS().simplify() );
98          setRHS( getRHS().simplify() );
99  
100         return this;
101     }
102 }