Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
DefaultRelationalExpr |
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1 | /* |
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2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultRelationalExpr.java,v 1.13 2005/06/28 13:44:44 elharo Exp $ |
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3 | * $Revision: 1.13 $ |
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4 | * $Date: 2005/06/28 13:44:44 $ |
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5 | * |
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6 | * ==================================================================== |
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7 | * |
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8 | * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * |
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15 | * 1. Redistributions of source code must retain the above copyright |
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16 | * notice, this list of conditions, and the following disclaimer. |
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17 | * |
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18 | * 2. Redistributions in binary form must reproduce the above copyright |
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19 | * notice, this list of conditions, and the disclaimer that follows |
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20 | * these conditions in the documentation and/or other materials |
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21 | * provided with the distribution. |
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22 | * |
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23 | * 3. The name "Jaxen" must not be used to endorse or promote products |
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24 | * derived from this software without prior written permission. For |
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25 | * written permission, please contact license@jaxen.org. |
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26 | * |
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27 | * 4. Products derived from this software may not be called "Jaxen", nor |
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28 | * may "Jaxen" appear in their name, without prior written permission |
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29 | * from the Jaxen Project Management (pm@jaxen.org). |
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30 | * |
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31 | * In addition, we request (but do not require) that you include in the |
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32 | * end-user documentation provided with the redistribution and/or in the |
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33 | * software itself an acknowledgement equivalent to the following: |
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34 | * "This product includes software developed by the |
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35 | * Jaxen Project <http://www.jaxen.org/>." |
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36 | * Alternatively, the acknowledgment may be graphical using the logos |
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37 | * available at http://www.jaxen.org/ |
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38 | * |
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39 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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40 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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41 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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42 | * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT |
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43 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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45 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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46 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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47 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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48 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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49 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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50 | * SUCH DAMAGE. |
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51 | * |
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52 | * ==================================================================== |
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53 | * This software consists of voluntary contributions made by many |
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54 | * individuals on behalf of the Jaxen Project and was originally |
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55 | * created by bob mcwhirter <bob@werken.com> and |
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56 | * James Strachan <jstrachan@apache.org>. For more information on the |
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57 | * Jaxen Project, please see <http://www.jaxen.org/>. |
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58 | * |
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59 | * $Id: DefaultRelationalExpr.java,v 1.13 2005/06/28 13:44:44 elharo Exp $ |
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60 | */ |
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61 | ||
62 | ||
63 | ||
64 | package org.jaxen.expr; |
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65 | ||
66 | import java.util.Iterator; |
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67 | import java.util.List; |
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68 | import org.jaxen.Context; |
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69 | import org.jaxen.JaxenException; |
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70 | import org.jaxen.Navigator; |
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71 | import org.jaxen.function.NumberFunction; |
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72 | ||
73 | abstract class DefaultRelationalExpr extends DefaultTruthExpr implements RelationalExpr |
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74 | { |
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75 | DefaultRelationalExpr( Expr lhs, Expr rhs ) |
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76 | { |
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77 | 600 | super( lhs, rhs ); |
78 | 600 | } |
79 | ||
80 | public String toString() |
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81 | { |
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82 | 0 | return "[(DefaultRelationalExpr): " + getLHS() + ", " + getRHS() + "]"; |
83 | } |
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84 | ||
85 | public Object evaluate( Context context ) throws JaxenException |
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86 | { |
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87 | 1182 | Object lhsValue = getLHS().evaluate( context ); |
88 | 1182 | Object rhsValue = getRHS().evaluate( context ); |
89 | 1182 | Navigator nav = context.getNavigator(); |
90 | ||
91 | 1182 | if( bothAreSets( lhsValue, rhsValue ) ) |
92 | { |
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93 | 0 | return evaluateSetSet( (List) lhsValue, (List) rhsValue, nav ); |
94 | } |
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95 | ||
96 | 1182 | if( eitherIsSet( lhsValue, rhsValue ) ) |
97 | { |
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98 | 144 | if( isSet( lhsValue ) ) |
99 | { |
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100 | 0 | return evaluateSetSet( (List) lhsValue, convertToList( rhsValue ), nav ); |
101 | } |
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102 | else |
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103 | { |
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104 | 144 | return evaluateSetSet( convertToList( lhsValue ), (List) rhsValue, nav ); |
105 | } |
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106 | } |
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107 | ||
108 | 1038 | return evaluateObjectObject( lhsValue, rhsValue, nav ) ? Boolean.TRUE : Boolean.FALSE; |
109 | } |
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110 | ||
111 | private Object evaluateSetSet( List lhsSet, List rhsSet, Navigator nav ) |
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112 | { |
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113 | 144 | if( setIsEmpty( lhsSet ) || setIsEmpty( rhsSet ) ) // return false if either is null or empty |
114 | { |
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115 | 0 | return Boolean.FALSE; |
116 | } |
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117 | ||
118 | 144 | for( Iterator lhsIterator = lhsSet.iterator(); lhsIterator.hasNext(); ) |
119 | { |
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120 | 144 | Object lhs = lhsIterator.next(); |
121 | ||
122 | 144 | for( Iterator rhsIterator = rhsSet.iterator(); rhsIterator.hasNext(); ) |
123 | { |
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124 | 720 | Object rhs = rhsIterator.next(); |
125 | ||
126 | 720 | if( evaluateObjectObject( lhs, rhs, nav ) ) |
127 | { |
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128 | 96 | return Boolean.TRUE; |
129 | } |
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130 | } |
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131 | } |
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132 | ||
133 | 48 | return Boolean.FALSE; |
134 | } |
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135 | ||
136 | private boolean evaluateObjectObject( Object lhs, Object rhs, Navigator nav ) |
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137 | { |
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138 | 1758 | if( lhs == null || rhs == null ) |
139 | { |
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140 | 0 | return false; |
141 | } |
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142 | ||
143 | 1758 | Double lhsNum = NumberFunction.evaluate( lhs, nav ); |
144 | 1758 | Double rhsNum = NumberFunction.evaluate( rhs, nav ); |
145 | ||
146 | 1758 | if( NumberFunction.isNaN( lhsNum ) || NumberFunction.isNaN( rhsNum ) ) |
147 | { |
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148 | 0 | return false; |
149 | } |
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150 | ||
151 | 1758 | return evaluateDoubleDouble( lhsNum, rhsNum ); |
152 | } |
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153 | ||
154 | protected abstract boolean evaluateDoubleDouble( Double lhs, Double rhs ); |
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155 | } |
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156 |