Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
DefaultFilterExpr |
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1 | /* |
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2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultFilterExpr.java,v 1.16 2005/09/06 13:41:00 elharo Exp $ |
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3 | * $Revision: 1.16 $ |
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4 | * $Date: 2005/09/06 13:41:00 $ |
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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: DefaultFilterExpr.java,v 1.16 2005/09/06 13:41:00 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.ArrayList; |
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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 | ||
71 | /** |
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72 | * @deprecated this class will become non-public in the future; |
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73 | * use the interface instead |
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74 | */ |
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75 | public class DefaultFilterExpr extends DefaultExpr implements FilterExpr, Predicated |
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76 | { |
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77 | private Expr expr; |
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78 | private PredicateSet predicates; |
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79 | ||
80 | public DefaultFilterExpr(PredicateSet predicateSet) |
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81 | 30 | { |
82 | 30 | this.predicates = predicateSet; |
83 | 30 | } |
84 | ||
85 | public DefaultFilterExpr(Expr expr, PredicateSet predicateSet) |
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86 | 13446 | { |
87 | 13446 | this.expr = expr; |
88 | 13446 | this.predicates = predicateSet; |
89 | 13446 | } |
90 | ||
91 | public void addPredicate(Predicate predicate) |
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92 | { |
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93 | 36 | this.predicates.addPredicate( predicate ); |
94 | 36 | } |
95 | ||
96 | public List getPredicates() |
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97 | { |
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98 | 0 | return this.predicates.getPredicates(); |
99 | } |
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100 | ||
101 | public PredicateSet getPredicateSet() |
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102 | { |
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103 | 6 | return this.predicates; |
104 | } |
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105 | ||
106 | public Expr getExpr() |
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107 | { |
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108 | 13368 | return this.expr; |
109 | } |
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110 | ||
111 | public String toString() |
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112 | { |
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113 | 0 | return "[(DefaultFilterExpr): expr: " + expr + " predicates: " + predicates + " ]"; |
114 | } |
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115 | ||
116 | public String getText() |
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117 | { |
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118 | 0 | String text = ""; |
119 | 0 | if ( this.expr != null ) |
120 | { |
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121 | 0 | text = this.expr.getText(); |
122 | } |
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123 | 0 | text += predicates.getText(); |
124 | 0 | return text; |
125 | } |
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126 | ||
127 | public Expr simplify() |
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128 | { |
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129 | 13368 | this.predicates.simplify(); |
130 | ||
131 | 13368 | if ( this.expr != null ) |
132 | { |
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133 | 13368 | this.expr = this.expr.simplify(); |
134 | } |
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135 | ||
136 | 13368 | if ( this.predicates.getPredicates().size() == 0 ) |
137 | { |
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138 | 13362 | return getExpr(); |
139 | } |
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140 | ||
141 | 6 | return this; |
142 | } |
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143 | ||
144 | /** Returns true if the current filter matches at least one of the context nodes |
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145 | */ |
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146 | public boolean asBoolean(Context context) throws JaxenException |
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147 | { |
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148 | 0 | Object results = null; |
149 | 0 | if ( expr != null ) |
150 | { |
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151 | 0 | results = expr.evaluate( context ); |
152 | } |
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153 | else |
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154 | { |
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155 | 0 | List nodeSet = context.getNodeSet(); |
156 | 0 | ArrayList list = new ArrayList(nodeSet.size()); |
157 | 0 | list.addAll( nodeSet ); |
158 | 0 | results = list; |
159 | } |
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160 | ||
161 | 0 | if ( results instanceof Boolean ) |
162 | { |
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163 | 0 | Boolean b = (Boolean) results; |
164 | 0 | return b.booleanValue(); |
165 | } |
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166 | 0 | if ( results instanceof List ) |
167 | { |
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168 | 0 | return getPredicateSet().evaluateAsBoolean( |
169 | (List) results, context.getContextSupport() |
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170 | ); |
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171 | } |
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172 | ||
173 | 0 | return false; |
174 | } |
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175 | ||
176 | public Object evaluate(Context context) throws JaxenException |
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177 | { |
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178 | 6 | Object results = getExpr().evaluate( context ); |
179 | ||
180 | 6 | if ( results instanceof List ) |
181 | { |
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182 | 6 | List newresults = getPredicateSet().evaluatePredicates( (List) results, |
183 | context.getContextSupport() ); |
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184 | 6 | results = newresults; |
185 | } |
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186 | ||
187 | 6 | return results; |
188 | } |
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189 | public void accept(Visitor visitor) |
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190 | { |
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191 | 0 | visitor.visit(this); |
192 | 0 | } |
193 | } |