1 /*
2  * $Header: /cvsroot/jaxen/jaxen/src/java/main/org/jaxen/expr/DefaultBinaryExpr.java,v 1.3 2002/04/26 17:17:34 jstrachan Exp $
3  * $Revision: 1.3 $
4  * $Date: 2002/04/26 17:17:34 $
5  *
6  * ====================================================================
7  *
8  * Copyright (C) 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
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions, and the following disclaimer.
17  *
18  * 2. Redistributions in binary form must reproduce the above copyright
19  *    notice, this list of conditions, and the disclaimer that follows
20  *    these conditions in the documentation and/or other materials
21  *    provided with the distribution.
22  *
23  * 3. The name "Jaxen" must not be used to endorse or promote products
24  *    derived from this software without prior written permission.  For
25  *    written permission, please contact license@jaxen.org.
26  *
27  * 4. Products derived from this software may not be called "Jaxen", nor
28  *    may "Jaxen" appear in their name, without prior written permission
29  *    from the Jaxen Project Management (pm@jaxen.org).
30  *
31  * In addition, we request (but do not require) that you include in the
32  * end-user documentation provided with the redistribution and/or in the
33  * software itself an acknowledgement equivalent to the following:
34  *     "This product includes software developed by the
35  *      Jaxen Project (http://www.jaxen.org/)."
36  * Alternatively, the acknowledgment may be graphical using the logos
37  * available at http://www.jaxen.org/
38  *
39  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42  * DISCLAIMED.  IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
43  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
48  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
49  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * ====================================================================
53  * This software consists of voluntary contributions made by many
54  * individuals on behalf of the Jaxen Project and was originally
55  * created by bob mcwhirter <bob@werken.com> and
56  * James Strachan <jstrachan@apache.org>.  For more information on the
57  * Jaxen Project, please see <http://www.jaxen.org/>.
58  *
59  * $Id: DefaultBinaryExpr.java,v 1.3 2002/04/26 17:17:34 jstrachan Exp $
60  */
61 
62 
63 
64 package org.jaxen.expr;
65 
66 abstract class DefaultBinaryExpr extends DefaultExpr implements BinaryExpr
67 {
68     private Expr lhs;
69     private Expr rhs;
70 
DefaultBinaryExpr(Expr lhs, Expr rhs)71     public DefaultBinaryExpr(Expr lhs,
72                              Expr rhs)
73     {
74         this.lhs = lhs;
75         this.rhs = rhs;
76     }
77 
getLHS()78     public Expr getLHS()
79     {
80         return this.lhs;
81     }
82 
getRHS()83     public Expr getRHS()
84     {
85         return this.rhs;
86     }
87 
setLHS(Expr lhs)88     public void setLHS(Expr lhs)
89     {
90         this.lhs = lhs;
91     }
92 
setRHS(Expr rhs)93     public void setRHS(Expr rhs)
94     {
95         this.rhs = rhs;
96     }
97 
getOperator()98     public abstract String getOperator();
99 
getText()100     public String getText()
101     {
102         Expr lhs = getLHS();
103         Expr rhs = getRHS();
104 
105         return "(" + getLHS().getText() + " " + getOperator() + " " + getRHS().getText() + ")";
106     }
107 
toString()108     public String toString()
109     {
110         return "[(" + getClass().getName() + "): " + getLHS() + ", " + getRHS() + "]";
111     }
112 
simplify()113     public Expr simplify()
114     {
115         setLHS( getLHS().simplify() );
116         setRHS( getRHS().simplify() );
117 
118         return this;
119     }
120 }
121