Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
EvaluateFunction |
|
| 5.5;5.5 |
1 | /* | |
2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/ext/EvaluateFunction.java,v 1.10 2006/02/05 21:47:42 elharo Exp $ | |
3 | * $Revision: 1.10 $ | |
4 | * $Date: 2006/02/05 21:47:42 $ | |
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: EvaluateFunction.java,v 1.10 2006/02/05 21:47:42 elharo Exp $ | |
46 | */ | |
47 | ||
48 | package org.jaxen.function.ext; | |
49 | ||
50 | import java.util.Collections; | |
51 | import java.util.List; | |
52 | ||
53 | import org.jaxen.Context; | |
54 | import org.jaxen.ContextSupport; | |
55 | import org.jaxen.Function; | |
56 | import org.jaxen.FunctionCallException; | |
57 | import org.jaxen.Navigator; | |
58 | import org.jaxen.XPath; | |
59 | import org.jaxen.function.StringFunction; | |
60 | ||
61 | /** | |
62 | * <code><i>node-set</i> evaluate(<i>string</i>)</code> | |
63 | * | |
64 | * @author Erwin Bolwidt (ejb @ klomp.org) | |
65 | */ | |
66 | 104 | public class EvaluateFunction implements Function |
67 | { | |
68 | public Object call( Context context, List args ) | |
69 | throws FunctionCallException | |
70 | { | |
71 | 56 | if ( args.size() == 1 ) { |
72 | 56 | return evaluate( context, args.get(0)); |
73 | } | |
74 | ||
75 | 0 | throw new FunctionCallException( "evaluate() requires one argument" ); |
76 | } | |
77 | ||
78 | public static List evaluate (Context context, Object arg) | |
79 | throws FunctionCallException | |
80 | { | |
81 | 56 | List contextNodes = context.getNodeSet(); |
82 | ||
83 | 56 | if (contextNodes.size() == 0) |
84 | 0 | return Collections.EMPTY_LIST; |
85 | ||
86 | 56 | Navigator nav = context.getNavigator(); |
87 | ||
88 | String xpathString; | |
89 | 56 | if ( arg instanceof String ) |
90 | 40 | xpathString = (String)arg; |
91 | else | |
92 | 16 | xpathString = StringFunction.evaluate(arg, nav); |
93 | ||
94 | try { | |
95 | 56 | XPath xpath = nav.parseXPath(xpathString); |
96 | 56 | ContextSupport support = context.getContextSupport(); |
97 | 56 | xpath.setVariableContext( support.getVariableContext() ); |
98 | 56 | xpath.setFunctionContext( support.getFunctionContext() ); |
99 | 56 | xpath.setNamespaceContext( support.getNamespaceContext() ); |
100 | 56 | return xpath.selectNodes( context.duplicate() ); |
101 | } | |
102 | 0 | catch ( org.jaxen.saxpath.SAXPathException e ) { |
103 | 0 | throw new FunctionCallException(e.toString()); |
104 | } | |
105 | } | |
106 | } | |
107 |