Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
DefaultUnionExpr |
|
| 2.25;2.25 |
1 | /* | |
2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultUnionExpr.java,v 1.17 2006/11/30 18:49:27 elharo Exp $ | |
3 | * $Revision: 1.17 $ | |
4 | * $Date: 2006/11/30 18:49:27 $ | |
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: DefaultUnionExpr.java,v 1.17 2006/11/30 18:49:27 elharo Exp $ | |
46 | */ | |
47 | ||
48 | ||
49 | ||
50 | package org.jaxen.expr; | |
51 | ||
52 | import java.util.ArrayList; | |
53 | import java.util.Collections; | |
54 | import java.util.HashSet; | |
55 | import java.util.Iterator; | |
56 | import java.util.List; | |
57 | import java.util.Set; | |
58 | import org.jaxen.Context; | |
59 | import org.jaxen.JaxenException; | |
60 | import org.jaxen.XPathSyntaxException; | |
61 | ||
62 | /** | |
63 | * @deprecated this class will become non-public in the future; | |
64 | * use the interface instead | |
65 | */ | |
66 | public class DefaultUnionExpr extends DefaultBinaryExpr implements UnionExpr | |
67 | { | |
68 | /** | |
69 | * | |
70 | */ | |
71 | private static final long serialVersionUID = 7629142718276852707L; | |
72 | ||
73 | public DefaultUnionExpr(Expr lhs, | |
74 | Expr rhs) | |
75 | { | |
76 | 40 | super( lhs, |
77 | rhs ); | |
78 | 40 | } |
79 | ||
80 | public String getOperator() | |
81 | { | |
82 | 12 | return "|"; |
83 | } | |
84 | ||
85 | public String toString() | |
86 | { | |
87 | 0 | return "[(DefaultUnionExpr): " + getLHS() + ", " + getRHS() + "]"; |
88 | } | |
89 | ||
90 | public Object evaluate(Context context) throws JaxenException | |
91 | { | |
92 | 30 | List results = new ArrayList(); |
93 | ||
94 | try { | |
95 | 30 | List lhsResults = (List) getLHS().evaluate( context ); |
96 | 20 | List rhsResults = (List) getRHS().evaluate( context ); |
97 | ||
98 | 18 | Set unique = new HashSet(); |
99 | ||
100 | 18 | results.addAll( lhsResults ); |
101 | 18 | unique.addAll( lhsResults ); |
102 | ||
103 | 18 | Iterator rhsIter = rhsResults.iterator(); |
104 | ||
105 | 56 | while ( rhsIter.hasNext() ) |
106 | { | |
107 | 38 | Object each = rhsIter.next(); |
108 | ||
109 | 38 | if ( ! unique.contains( each ) ) |
110 | { | |
111 | 28 | results.add( each ); |
112 | 28 | unique.add( each ); |
113 | } | |
114 | 38 | } |
115 | ||
116 | 18 | Collections.sort(results, new NodeComparator(context.getNavigator())); |
117 | ||
118 | 18 | return results; |
119 | } | |
120 | 12 | catch (ClassCastException e) { |
121 | 12 | throw new XPathSyntaxException(this.getText(), context.getPosition(), "Unions are only allowed over node-sets"); |
122 | } | |
123 | } | |
124 | ||
125 | } | |
126 |