##### Coverage Report - org.jaxen.pattern.PatternHandler

Classes in this File | Line Coverage | Branch Coverage | Complexity
PatternHandler |
0% |
0% |
| 1.65;1.65

1 |  |
     /*
2 |  |
      * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/pattern/PatternHandler.java,v 1.6 2005/06/28 13:44:44 elharo Exp $
3 |  |
      * $Revision: 1.6 $
4 |  |
      * $Date: 2005/06/28 13:44:44 $
5 |  |
      *
6 |  |
      * ====================================================================
7 |  |
      *
8 |  |
      * Copyright (C) 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
13 |  |
      * are met:
14 |  |
      *
15 |  |
      * 1. Redistributions of source code must retain the above copyright
16 |  |
      *    notice, this list of conditions, and the following disclaimer.
17 |  |
      *
18 |  |
      * 2. Redistributions in binary form must reproduce the above copyright
19 |  |
      *    notice, this list of conditions, and the disclaimer that follows
20 |  |
      *    these conditions in the documentation and/or other materials
21 |  |
      *    provided with the distribution.
22 |  |
      *
23 |  |
      * 3. The name "Jaxen" must not be used to endorse or promote products
24 |  |
      *    derived from this software without prior written permission.  For
25 |  |
      *    written permission, please contact license@jaxen.org.
26 |  |
      *
27 |  |
      * 4. Products derived from this software may not be called "Jaxen", nor
28 |  |
      *    may "Jaxen" appear in their name, without prior written permission
29 |  |
      *    from the Jaxen Project Management (pm@jaxen.org).
30 |  |
      *
31 |  |
      * In addition, we request (but do not require) that you include in the
32 |  |
      * end-user documentation provided with the redistribution and/or in the
33 |  |
      * software itself an acknowledgement equivalent to the following:
34 |  |
      *     "This product includes software developed by the
35 |  |
      *      Jaxen Project <http://www.jaxen.org/>."
36 |  |
      * Alternatively, the acknowledgment may be graphical using the logos
37 |  |
      * available at http://www.jaxen.org/
38 |  |
      *
39 |  |
      * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40 |  |
      * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41 |  |
      * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42 |  |
      * DISCLAIMED.  IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
43 |  |
      * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 |  |
      * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45 |  |
      * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46 |  |
      * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47 |  |
      * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
48 |  |
      * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
49 |  |
      * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 |  |
      * SUCH DAMAGE.
51 |  |
      *
52 |  |
      * ====================================================================
53 |  |
      * This software consists of voluntary contributions made by many
54 |  |
      * individuals on behalf of the Jaxen Project and was originally
55 |  |
      * created by bob mcwhirter <bob@werken.com> and
56 |  |
      * James Strachan <jstrachan@apache.org>.  For more information on the
57 |  |
      * Jaxen Project, please see <http://www.jaxen.org/>.
58 |  |
      *
59 |  |
      * $Id: PatternHandler.java,v 1.6 2005/06/28 13:44:44 elharo Exp $
60 |  |
      */
61 |  |
62 |  |
63 |  |
     package org.jaxen.pattern;
64 |  |
65 |  |
     import java.util.LinkedList;
66 |  |
67 |  |
     import org.jaxen.JaxenException;
68 |  |
     import org.jaxen.JaxenHandler;
69 |  |
     import org.jaxen.expr.Expr;
70 |  |
     import org.jaxen.expr.FilterExpr;
71 |  |
     import org.jaxen.saxpath.Axis;
72 |  |
73 |  |
     /** SAXPath <code>XPathHandler</code> implementation capable
74 |  |
      *  of building Jaxen expression trees which can walk various
75 |  |
      *  different object models.
76 |  |
      *
77 |  |
      *  @author bob mcwhirter (bob@werken.com)
78 |  |
      */
79 |  |
     public class PatternHandler extends JaxenHandler
80 |  |
     {
81 |  |
         private Pattern pattern;
82 |  |
83 |  |
         public PatternHandler()
84 | 0 |
         {
85 | 0 |
         }
86 |  |
87 |  |
         /** Retrieve the simplified Jaxen Pattern expression tree.
88 |  |
          *
89 |  |
          *  <p>
90 |  |
          *  This method is only valid once <code>XPathReader.parse(...)</code>
91 |  |
          *  successfully returned.
92 |  |
          *  </p>
93 |  |
          *
94 |  |
          *  @return The Pattern expression tree.
95 |  |
          */
96 |  |
         public Pattern getPattern()
97 |  |
         {
98 | 0 |
             return getPattern( true );
99 |  |
         }
100 |  |
101 |  |
         /** Retrieve the Jaxen Pattern expression tree, optionally
102 |  |
          *  simplified.
103 |  |
          *
104 |  |
          *  <p>
105 |  |
          *  This method is only valid once <code>XPathReader.parse(...)</code>
106 |  |
          *  successfully returned.
107 |  |
          *  </p>
108 |  |
          *
109 |  |
          *  @return The Pattern expression tree.
110 |  |
          */
111 |  |
         public Pattern getPattern(boolean shouldSimplify)
112 |  |
         {
113 | 0 |
             if ( shouldSimplify && ! this.simplified )
114 |  |
             {
115 |  |
                 //System.err.println("simplifyin....");
116 | 0 |
                 this.pattern.simplify();
117 | 0 |
                 this.simplified = true;
118 |  |
             }
119 |  |
120 | 0 |
             return this.pattern;
121 |  |
         }
122 |  |
123 |  |
124 |  |
125 |  |
126 |  |
         public void endXPath() throws JaxenException
127 |  |
         {
128 | 0 |
             this.pattern = (Pattern) pop();
129 |  |
130 | 0 |
             System.out.println( "stack is: " + stack );
131 |  |
132 | 0 |
             popFrame();
133 | 0 |
         }
134 |  |
135 |  |
         public void endPathExpr() throws JaxenException
136 |  |
         {
137 |  |
             //System.err.println("endPathExpr()");
138 |  |
139 |  |
             // PathExpr ::=   LocationPath
140 |  |
             //              | FilterExpr
141 |  |
             //              | FilterExpr / RelativeLocationPath
142 |  |
             //              | FilterExpr // RelativeLocationPath
143 |  |
             //
144 |  |
             // If the current stack-frame has two items, it's a
145 |  |
             // FilterExpr and a LocationPath (of some flavor).
146 |  |
             //
147 |  |
             // If the current stack-frame has one item, it's simply
148 |  |
             // a FilterExpr, and more than like boils down to a
149 |  |
             // primary expr of some flavor.  But that's for another
150 |  |
             // method...
151 |  |
152 | 0 |
             LinkedList frame = popFrame();
153 |  |
154 | 0 |
             System.out.println( "endPathExpr(): " + frame );
155 |  |
156 | 0 |
             push( frame.removeFirst() );
157 |  |
     /*
158 |  |
             LocationPathPattern locationPath = new LocationPathPattern();
159 |  |
             push( locationPath );
160 |  |
             while (! frame.isEmpty() )
161 |  |
             {
162 |  |
                 Object filter = frame.removeLast();
163 |  |
                 if ( filter instanceof NodeTest )
164 |  |
                 {
165 |  |
                     locationPath.setNodeTest( (NodeTest) filter );
166 |  |
                 }
167 |  |
                 else if ( filter instanceof FilterExpr )
168 |  |
                 {
169 |  |
                     locationPath.addFilter( (FilterExpr) filter );
170 |  |
                 }
171 |  |
                 else if ( filter instanceof LocationPathPattern )
172 |  |
                 {
173 |  |
                     LocationPathPattern parent = (LocationPathPattern) filter;
174 |  |
                     locationPath.setParentPattern( parent );
175 |  |
                     locationPath = parent;
176 |  |
                 }
177 |  |
                 else if ( filter != null )
178 |  |
                 {
179 |  |
                     throw new JaxenException( "Unknown filter: " + filter );
180 |  |
                 }
181 |  |
             }
182 |  |
     */
183 | 0 |
         }
184 |  |
185 |  |
         public void startAbsoluteLocationPath() throws JaxenException
186 |  |
         {
187 |  |
             //System.err.println("startAbsoluteLocationPath()");
188 | 0 |
             pushFrame();
189 |  |
190 | 0 |
             push( createAbsoluteLocationPath() );
191 | 0 |
         }
192 |  |
193 |  |
         public void endAbsoluteLocationPath() throws JaxenException
194 |  |
         {
195 |  |
             //System.err.println("endAbsoluteLocationPath()");
196 | 0 |
             endLocationPath();
197 | 0 |
         }
198 |  |
199 |  |
         public void startRelativeLocationPath() throws JaxenException
200 |  |
         {
201 |  |
             //System.err.println("startRelativeLocationPath()");
202 | 0 |
             pushFrame();
203 |  |
204 | 0 |
             push( createRelativeLocationPath() );
205 | 0 |
         }
206 |  |
207 |  |
         public void endRelativeLocationPath() throws JaxenException
208 |  |
         {
209 |  |
             //System.err.println("endRelativeLocationPath()");
210 | 0 |
             endLocationPath();
211 | 0 |
         }
212 |  |
213 |  |
         protected void endLocationPath() throws JaxenException
214 |  |
         {
215 |  |
             // start at the back, its the main pattern then add everything else as
216 | 0 |
             LinkedList list = popFrame();
217 |  |
218 | 0 |
             System.out.println( "endLocationPath: " + list );
219 |  |
220 | 0 |
             LocationPathPattern locationPath = (LocationPathPattern) list.removeFirst();
221 | 0 |
             push( locationPath );
222 | 0 |
             boolean doneNodeTest = false;
223 | 0 |
             while ( ! list.isEmpty() )
224 |  |
             {
225 | 0 |
                 Object filter = list.removeFirst();
226 | 0 |
                 if ( filter instanceof NodeTest )
227 |  |
                 {
228 | 0 |
                     if ( doneNodeTest )
229 |  |
                     {
230 | 0 |
                         LocationPathPattern parent = new LocationPathPattern( (NodeTest) filter );
231 | 0 |
                         locationPath.setParentPattern( parent );
232 | 0 |
                         locationPath = parent;
233 | 0 |
                         doneNodeTest = false;
234 |  |
                     }
235 |  |
                     else
236 |  |
                     {
237 | 0 |
                         locationPath.setNodeTest( (NodeTest) filter );
238 |  |
                     }
239 |  |
                 }
240 | 0 |
                 else if ( filter instanceof FilterExpr )
241 |  |
                 {
242 | 0 |
                     locationPath.addFilter( (FilterExpr) filter );
243 |  |
                 }
244 | 0 |
                 else if ( filter instanceof LocationPathPattern )
245 |  |
                 {
246 | 0 |
                     LocationPathPattern parent = (LocationPathPattern) filter;
247 | 0 |
                     locationPath.setParentPattern( parent );
248 | 0 |
                     locationPath = parent;
249 | 0 |
                     doneNodeTest = false;
250 |  |
                 }
251 |  |
             }
252 | 0 |
         }
253 |  |
254 |  |
255 |  |
         public void startNameStep(int axis,
256 |  |
                                   String prefix,
257 |  |
                                   String localName) throws JaxenException
258 |  |
         {
259 |  |
             //System.err.println("startNameStep(" + axis + ", " + prefix + ", " + localName + ")");
260 | 0 |
             pushFrame();
261 |  |
262 | 0 |
             short nodeType = Pattern.ELEMENT_NODE;
263 | 0 |
             switch ( axis )
264 |  |
             {
265 |  |
                 case Axis.ATTRIBUTE:
266 | 0 |
                     nodeType = Pattern.ATTRIBUTE_NODE;
267 | 0 |
                     break;
268 |  |
                 case Axis.NAMESPACE:
269 | 0 |
                     nodeType = Pattern.NAMESPACE_NODE;
270 |  |
                     break;
271 |  |
             }
272 |  |
273 | 0 |
             if ( prefix != null && prefix.length() > 0 && ! prefix.equals( "*" ) )
274 |  |
             {
275 | 0 |
                 push( new NamespaceTest( prefix, nodeType ) );
276 |  |
             }
277 | 0 |
             if ( localName != null && localName.length() > 0 && ! localName.equals( "*" ) )
278 |  |
             {
279 | 0 |
                 push( new NameTest( localName, nodeType ) );
280 |  |
             }
281 | 0 |
         }
282 |  |
283 |  |
         public void startTextNodeStep(int axis) throws JaxenException
284 |  |
         {
285 |  |
             //System.err.println("startTextNodeStep()");
286 | 0 |
             pushFrame();
287 |  |
288 | 0 |
             push( new NodeTypeTest( Pattern.TEXT_NODE ) );
289 | 0 |
         }
290 |  |
291 |  |
         public void startCommentNodeStep(int axis) throws JaxenException
292 |  |
         {
293 |  |
             //System.err.println("startCommentNodeStep()");
294 | 0 |
             pushFrame();
295 |  |
296 | 0 |
             push( new NodeTypeTest( Pattern.COMMENT_NODE ) );
297 | 0 |
         }
298 |  |
299 |  |
         public void startAllNodeStep(int axis) throws JaxenException
300 |  |
         {
301 |  |
             //System.err.println("startAllNodeStep()");
302 | 0 |
             pushFrame();
303 |  |
304 | 0 |
             push( AnyNodeTest.getInstance() );
305 | 0 |
         }
306 |  |
307 |  |
         public void startProcessingInstructionNodeStep(int axis,
308 |  |
                                                        String name) throws JaxenException
309 |  |
         {
310 |  |
             //System.err.println("startProcessingInstructionStep()");
311 | 0 |
             pushFrame();
312 |  |
313 |  |
             // XXXX: should we throw an exception if name is present?
314 | 0 |
             push( new NodeTypeTest( Pattern.PROCESSING_INSTRUCTION_NODE ) );
315 | 0 |
         }
316 |  |
317 |  |
         protected void endStep()
318 |  |
         {
319 | 0 |
             LinkedList list = popFrame();
320 | 0 |
             if ( ! list.isEmpty() )
321 |  |
             {
322 | 0 |
                 push( list.removeFirst() );
323 |  |
324 | 0 |
                 if ( ! list.isEmpty() )
325 |  |
                 {
326 | 0 |
                     System.out.println( "List should now be empty!" + list );
327 |  |
                 }
328 |  |
             }
329 | 0 |
         }
330 |  |
331 |  |
332 |  |
         public void startUnionExpr() throws JaxenException
333 |  |
         {
334 |  |
             //System.err.println("startUnionExpr()");
335 | 0 |
         }
336 |  |
337 |  |
         public void endUnionExpr(boolean create) throws JaxenException
338 |  |
         {
339 |  |
             //System.err.println("endUnionExpr()");
340 |  |
341 | 0 |
             if ( create )
342 |  |
             {
343 |  |
                 //System.err.println("makeUnionExpr");
344 |  |
345 | 0 |
                 Expr rhs = (Expr) pop();
346 | 0 |
                 Expr lhs = (Expr) pop();
347 |  |
348 | 0 |
                 push( getXPathFactory().createUnionExpr( lhs,
349 |  |
                                                         rhs ) );
350 |  |
             }
351 | 0 |
         }
352 |  |
353 |  |
         protected Pattern createAbsoluteLocationPath()
354 |  |
         {
355 | 0 |
             return new LocationPathPattern( NodeTypeTest.DOCUMENT_TEST );
356 |  |
         }
357 |  |
358 |  |
         protected Pattern createRelativeLocationPath()
359 |  |
         {
360 | 0 |
             return new LocationPathPattern();
361 |  |
         }
362 |  |
363 |  |
     }