Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
DefaultRelationalExpr |
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| 3.6666666666666665;3.667 |
1 | /* | |
2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultRelationalExpr.java,v 1.14 2006/02/05 21:47:40 elharo Exp $ | |
3 | * $Revision: 1.14 $ | |
4 | * $Date: 2006/02/05 21:47:40 $ | |
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: DefaultRelationalExpr.java,v 1.14 2006/02/05 21:47:40 elharo Exp $ | |
46 | */ | |
47 | ||
48 | ||
49 | ||
50 | package org.jaxen.expr; | |
51 | ||
52 | import java.util.Iterator; | |
53 | import java.util.List; | |
54 | import org.jaxen.Context; | |
55 | import org.jaxen.JaxenException; | |
56 | import org.jaxen.Navigator; | |
57 | import org.jaxen.function.NumberFunction; | |
58 | ||
59 | abstract class DefaultRelationalExpr extends DefaultTruthExpr implements RelationalExpr | |
60 | { | |
61 | DefaultRelationalExpr( Expr lhs, Expr rhs ) | |
62 | { | |
63 | 458 | super( lhs, rhs ); |
64 | 458 | } |
65 | ||
66 | public String toString() | |
67 | { | |
68 | 0 | return "[(DefaultRelationalExpr): " + getLHS() + ", " + getRHS() + "]"; |
69 | } | |
70 | ||
71 | public Object evaluate( Context context ) throws JaxenException | |
72 | { | |
73 | 468 | Object lhsValue = getLHS().evaluate( context ); |
74 | 468 | Object rhsValue = getRHS().evaluate( context ); |
75 | 468 | Navigator nav = context.getNavigator(); |
76 | ||
77 | 468 | if( bothAreSets( lhsValue, rhsValue ) ) |
78 | { | |
79 | 0 | return evaluateSetSet( (List) lhsValue, (List) rhsValue, nav ); |
80 | } | |
81 | ||
82 | 468 | if( eitherIsSet( lhsValue, rhsValue ) ) |
83 | { | |
84 | 48 | if( isSet( lhsValue ) ) |
85 | { | |
86 | 0 | return evaluateSetSet( (List) lhsValue, convertToList( rhsValue ), nav ); |
87 | } | |
88 | else | |
89 | { | |
90 | 48 | return evaluateSetSet( convertToList( lhsValue ), (List) rhsValue, nav ); |
91 | } | |
92 | } | |
93 | ||
94 | 420 | return evaluateObjectObject( lhsValue, rhsValue, nav ) ? Boolean.TRUE : Boolean.FALSE; |
95 | } | |
96 | ||
97 | private Object evaluateSetSet( List lhsSet, List rhsSet, Navigator nav ) | |
98 | { | |
99 | 48 | if( setIsEmpty( lhsSet ) || setIsEmpty( rhsSet ) ) // return false if either is null or empty |
100 | { | |
101 | 0 | return Boolean.FALSE; |
102 | } | |
103 | ||
104 | 48 | for( Iterator lhsIterator = lhsSet.iterator(); lhsIterator.hasNext(); ) |
105 | { | |
106 | 48 | Object lhs = lhsIterator.next(); |
107 | ||
108 | 48 | for( Iterator rhsIterator = rhsSet.iterator(); rhsIterator.hasNext(); ) |
109 | { | |
110 | 240 | Object rhs = rhsIterator.next(); |
111 | ||
112 | 240 | if( evaluateObjectObject( lhs, rhs, nav ) ) |
113 | { | |
114 | 32 | return Boolean.TRUE; |
115 | } | |
116 | 208 | } |
117 | 16 | } |
118 | ||
119 | 16 | return Boolean.FALSE; |
120 | } | |
121 | ||
122 | private boolean evaluateObjectObject( Object lhs, Object rhs, Navigator nav ) | |
123 | { | |
124 | 660 | if( lhs == null || rhs == null ) |
125 | { | |
126 | 0 | return false; |
127 | } | |
128 | ||
129 | 660 | Double lhsNum = NumberFunction.evaluate( lhs, nav ); |
130 | 660 | Double rhsNum = NumberFunction.evaluate( rhs, nav ); |
131 | ||
132 | 660 | if( NumberFunction.isNaN( lhsNum ) || NumberFunction.isNaN( rhsNum ) ) |
133 | { | |
134 | 0 | return false; |
135 | } | |
136 | ||
137 | 660 | return evaluateDoubleDouble( lhsNum, rhsNum ); |
138 | } | |
139 | ||
140 | protected abstract boolean evaluateDoubleDouble( Double lhs, Double rhs ); | |
141 | } | |
142 |