1 /*
2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultPlusExpr.java,v 1.14 2006/11/30 18:49:26 elharo Exp $
3 * $Revision: 1.14 $
4 * $Date: 2006/11/30 18:49:26 $
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: DefaultPlusExpr.java,v 1.14 2006/11/30 18:49:26 elharo Exp $
46 */
47
48
49 package org.jaxen.expr;
50
51 import org.jaxen.Context;
52 import org.jaxen.JaxenException;
53 import org.jaxen.function.NumberFunction;
54
55 class DefaultPlusExpr extends DefaultAdditiveExpr
56 {
57 /***
58 *
59 */
60 private static final long serialVersionUID = -1426954461146769374L;
61 DefaultPlusExpr(Expr lhs,
62 Expr rhs)
63 {
64 super( lhs,
65 rhs );
66 }
67
68 public String getOperator()
69 {
70 return "+";
71 }
72
73 public Object evaluate(Context context) throws JaxenException
74 {
75 Number lhsValue = NumberFunction.evaluate( getLHS().evaluate( context ),
76 context.getNavigator() );
77 Number rhsValue = NumberFunction.evaluate( getRHS().evaluate( context ),
78 context.getNavigator() );
79
80 double result = lhsValue.doubleValue() + rhsValue.doubleValue();
81
82 return new Double( result );
83 }
84
85 }