Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
DefaultStep |
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1 | /* |
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2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultStep.java,v 1.20 2005/09/06 13:41:01 elharo Exp $ |
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3 | * $Revision: 1.20 $ |
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4 | * $Date: 2005/09/06 13:41:01 $ |
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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: DefaultStep.java,v 1.20 2005/09/06 13:41:01 elharo Exp $ |
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60 | */ |
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61 | package org.jaxen.expr; |
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62 | ||
63 | import java.util.ArrayList; |
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64 | import java.util.Iterator; |
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65 | import java.util.List; |
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66 | ||
67 | import org.jaxen.Context; |
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68 | import org.jaxen.ContextSupport; |
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69 | import org.jaxen.JaxenException; |
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70 | import org.jaxen.UnsupportedAxisException; |
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71 | import org.jaxen.expr.iter.IterableAxis; |
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72 | import org.jaxen.saxpath.Axis; |
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73 | ||
74 | /** |
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75 | * @deprecated this class will become non-public in the future; |
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76 | * use the interface instead |
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77 | */ |
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78 | public abstract class DefaultStep implements Step |
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79 | { |
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80 | private IterableAxis axis; |
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81 | private PredicateSet predicates; |
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82 | ||
83 | public DefaultStep(IterableAxis axis, PredicateSet predicates) |
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84 | 16026 | { |
85 | 16026 | this.axis = axis; |
86 | 16026 | this.predicates = predicates; |
87 | 16026 | } |
88 | ||
89 | public void addPredicate(Predicate predicate) |
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90 | { |
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91 | 2310 | this.predicates.addPredicate(predicate); |
92 | 2310 | } |
93 | ||
94 | public List getPredicates() |
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95 | { |
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96 | 192 | return this.predicates.getPredicates(); |
97 | } |
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98 | ||
99 | public PredicateSet getPredicateSet() |
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100 | { |
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101 | 54282 | return this.predicates; |
102 | } |
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103 | ||
104 | public int getAxis() |
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105 | { |
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106 | 37092 | return this.axis.value(); |
107 | } |
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108 | ||
109 | public IterableAxis getIterableAxis() |
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110 | { |
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111 | 103860 | return this.axis; |
112 | } |
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113 | ||
114 | public String getAxisName() |
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115 | { |
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116 | 72 | return Axis.lookup(getAxis()); |
117 | } |
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118 | ||
119 | public String getText() |
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120 | { |
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121 | 72 | return this.predicates.getText(); |
122 | } |
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123 | ||
124 | public String toString() |
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125 | { |
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126 | 0 | return getIterableAxis() + " " + super.toString(); |
127 | } |
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128 | ||
129 | public void simplify() |
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130 | { |
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131 | 15642 | this.predicates.simplify(); |
132 | 15642 | } |
133 | ||
134 | public Iterator axisIterator(Object contextNode, ContextSupport support) |
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135 | throws UnsupportedAxisException |
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136 | { |
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137 | 78330 | return getIterableAxis().iterator(contextNode, support); |
138 | } |
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139 | ||
140 | public List evaluate(final Context context) throws JaxenException |
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141 | { |
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142 | 2958 | final List contextNodeSet = context.getNodeSet(); |
143 | 2958 | final IdentitySet unique = new IdentitySet(); |
144 | 2958 | final int contextSize = contextNodeSet.size(); |
145 | ||
146 | // ???? try linked lists instead? |
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147 | // ???? initial size for these? |
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148 | 2958 | final ArrayList interimSet = new ArrayList(); |
149 | 2958 | final ArrayList newNodeSet = new ArrayList(); |
150 | 2958 | final ContextSupport support = context.getContextSupport(); |
151 | ||
152 | // ???? use iterator instead |
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153 | 10452 | for ( int i = 0 ; i < contextSize ; ++i ) |
154 | { |
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155 | 7500 | Object eachContextNode = contextNodeSet.get( i ); |
156 | ||
157 | ||
158 | /* See jaxen-106. Might be able to optimize this by doing |
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159 | * specific matching for individual axes. For instance on namespace axis |
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160 | * we should only get namespace nodes and on attribute axes we only get |
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161 | * attribute nodes. Self and parent axes have single members. |
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162 | * Children, descendant, ancestor, and sibling axes never |
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163 | * see any attributes or namespaces |
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164 | */ |
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165 | 7500 | Iterator axisNodeIter = axis.iterator(eachContextNode, support); |
166 | 122322 | while ( axisNodeIter.hasNext() ) |
167 | { |
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168 | 114828 | Object eachAxisNode = axisNodeIter.next(); |
169 | 114828 | if ( ! unique.contains( eachAxisNode ) ) |
170 | { |
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171 | 114780 | if ( matches( eachAxisNode, support ) ) |
172 | { |
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173 | 109692 | unique.add( eachAxisNode ); |
174 | 109692 | interimSet.add( eachAxisNode ); |
175 | } |
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176 | } |
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177 | } |
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178 | 7494 | newNodeSet.addAll(getPredicateSet().evaluatePredicates( |
179 | interimSet, support )); |
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180 | 7494 | interimSet.clear(); |
181 | } |
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182 | 2952 | return newNodeSet; |
183 | } |
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184 | ||
185 | } |