dom4j - 1.6.1

Clover coverage report - dom4j - 1.6.1
Coverage timestamp: ma mei 16 2005 14:23:01 GMT+01:00
FRAMES NO FRAMES

file stats: | LOC: | 459 |  | Methods: | 23
| NCLOC: | 157 |  | Classes: | 1

Source file | Conditionals | Statements | Methods | TOTAL

SAXModifier.java

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1 |  | /*
2 |  | * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
3 |  | *
4 |  | * This software is open source.
5 |  | * See the bottom of this file for the licence.
6 |  | */
7 |  |
8 |  | package org.dom4j.io;
9 |  |
10 |  | import java.io.File;
11 |  | import java.io.InputStream;
12 |  | import java.io.Reader;
13 |  | import java.net.URL;
14 |  | import java.util.HashMap;
15 |  | import java.util.Iterator;
16 |  | import java.util.Map;
17 |  |
18 |  | import org.dom4j.Document;
19 |  | import org.dom4j.DocumentException;
20 |  | import org.dom4j.DocumentFactory;
21 |  |
22 |  | import org.xml.sax.InputSource;
23 |  | import org.xml.sax.SAXException;
24 |  | import org.xml.sax.XMLReader;
25 |  |
26 |  | /**
27 |  | * The SAXModifier reads, modifies and writes XML documents using SAX.
28 |  | *
29 |  | * <p>
30 |  | * Registered {@link ElementModifier}objects can provide modifications to (part
31 |  | * of) the xml tree, while the document is still being processed. This makes it
32 |  | * possible to change large xml documents without having them in memory.
33 |  | * </p>
34 |  | *
35 |  | * <p>
36 |  | * The modified document is written when the {@link XMLWriter}is specified.
37 |  | * </p>
38 |  | *
39 |  | * @author Wonne Keysers (Realsoftware.be)
40 |  | *
41 |  | * @see org.dom4j.io.SAXReader
42 |  | * @see org.dom4j.io.XMLWriter
43 |  | */
44 |  | public class SAXModifier {
45 |  | private XMLWriter xmlWriter;
46 |  |
47 |  | private XMLReader xmlReader;
48 |  |
49 |  | private boolean pruneElements;
50 |  |
51 |  | private SAXModifyReader modifyReader;
52 |  |
53 |  | private HashMap modifiers = new HashMap();
54 |  |
55 |  | /**
56 |  | * Creates a new modifier. <br>
57 |  | * The XMLReader to parse the source will be created via the
58 |  | * org.xml.sax.driver system property or JAXP if the system property is not
59 |  | * set.
60 |  | */
61 | 0 | public SAXModifier() {
62 |  | }
63 |  |
64 |  | /**
65 |  | * Creates a new modifier. <br>
66 |  | * The XMLReader to parse the source will be created via the
67 |  | * org.xml.sax.driver system property or JAXP if the system property is not
68 |  | * set.
69 |  | *
70 |  | * @param pruneElements
71 |  | * Set to true when the modified document must NOT be kept in
72 |  | * memory.
73 |  | */
74 | 0 | public SAXModifier(boolean pruneElements) {
75 | 0 | this.pruneElements = pruneElements;
76 |  | }
77 |  |
78 |  | /**
79 |  | * Creates a new modifier that will the specified {@link
80 |  | * org.xml.sax.XMLReader} to parse the source.
81 |  | *
82 |  | * @param xmlReader
83 |  | * The XMLReader to use
84 |  | */
85 | 0 | public SAXModifier(XMLReader xmlReader) {
86 | 0 | this.xmlReader = xmlReader;
87 |  | }
88 |  |
89 |  | /**
90 |  | * Creates a new modifier that will the specified {@link
91 |  | * org.xml.sax.XMLReader} to parse the source.
92 |  | *
93 |  | * @param xmlReader
94 |  | * The XMLReader to use
95 |  | * @param pruneElements
96 |  | * Set to true when the modified document must NOT be kept in
97 |  | * memory.
98 |  | */
99 | 0 | public SAXModifier(XMLReader xmlReader, boolean pruneElements) {
100 | 0 | this.xmlReader = xmlReader;
101 |  | }
102 |  |
103 |  | /**
104 |  | * Reads a Document from the given {@link java.io.File}and writes it to the
105 |  | * specified {@link XMLWriter}using SAX. Registered {@linkElementModifier}
106 |  | * objects are invoked on the fly.
107 |  | *
108 |  | * @param source
109 |  | * is the <code>File</code> to read from.
110 |  | *
111 |  | * @return the newly created Document instance
112 |  | *
113 |  | * @throws DocumentException
114 |  | * DocumentException org.dom4j.DocumentException} if an error
115 |  | * occurs during parsing.
116 |  | */
117 | 0 | public Document modify(File source) throws DocumentException {
118 | 0 | try {
119 | 0 | return installModifyReader().read(source);
120 |  | } catch (SAXModifyException ex) {
121 | 0 | Throwable cause = ex.getCause();
122 | 0 | throw new DocumentException(cause.getMessage(), cause);
123 |  | }
124 |  | }
125 |  |
126 |  | /**
127 |  | * Reads a Document from the given {@link org.xml.sax.InputSource}and
128 |  | * writes it to the specified {@link XMLWriter}using SAX. Registered
129 |  | * {@link ElementModifier}objects are invoked on the fly.
130 |  | *
131 |  | * @param source
132 |  | * is the <code>org.xml.sax.InputSource</code> to read from.
133 |  | *
134 |  | * @return the newly created Document instance
135 |  | *
136 |  | * @throws DocumentException
137 |  | * DocumentException org.dom4j.DocumentException} if an error
138 |  | * occurs during parsing.
139 |  | */
140 | 0 | public Document modify(InputSource source) throws DocumentException {
141 | 0 | try {
142 | 0 | return installModifyReader().read(source);
143 |  | } catch (SAXModifyException ex) {
144 | 0 | Throwable cause = ex.getCause();
145 | 0 | throw new DocumentException(cause.getMessage(), cause);
146 |  | }
147 |  | }
148 |  |
149 |  | /**
150 |  | * Reads a Document from the given {@link java.io.InputStream}and writes it
151 |  | * to the specified {@link XMLWriter}using SAX. Registered {@link
152 |  | * ElementModifier} objects are invoked on the fly.
153 |  | *
154 |  | * @param source
155 |  | * is the <code>java.io.InputStream</code> to read from.
156 |  | *
157 |  | * @return the newly created Document instance
158 |  | *
159 |  | * @throws DocumentException
160 |  | * DocumentException org.dom4j.DocumentException} if an error
161 |  | * occurs during parsing.
162 |  | */
163 | 0 | public Document modify(InputStream source) throws DocumentException {
164 | 0 | try {
165 | 0 | return installModifyReader().read(source);
166 |  | } catch (SAXModifyException ex) {
167 | 0 | Throwable cause = ex.getCause();
168 | 0 | throw new DocumentException(cause.getMessage(), cause);
169 |  | }
170 |  | }
171 |  |
172 |  | /**
173 |  | * Reads a Document from the given {@link java.io.InputStream}and writes it
174 |  | * to the specified {@link XMLWriter}using SAX. Registered {@link
175 |  | * ElementModifier} objects are invoked on the fly.
176 |  | *
177 |  | * @param source
178 |  | * is the <code>java.io.InputStream</code> to read from.
179 |  | * @param systemId
180 |  | * DOCUMENT ME!
181 |  | *
182 |  | * @return the newly created Document instance
183 |  | *
184 |  | * @throws DocumentException
185 |  | * DocumentException org.dom4j.DocumentException} if an error
186 |  | * occurs during parsing.
187 |  | */
188 | 0 | public Document modify(InputStream source, String systemId)
189 |  | throws DocumentException {
190 | 0 | try {
191 | 0 | return installModifyReader().read(source);
192 |  | } catch (SAXModifyException ex) {
193 | 0 | Throwable cause = ex.getCause();
194 | 0 | throw new DocumentException(cause.getMessage(), cause);
195 |  | }
196 |  | }
197 |  |
198 |  | /**
199 |  | * Reads a Document from the given {@link java.io.Reader}and writes it to
200 |  | * the specified {@link XMLWriter}using SAX. Registered {@link
201 |  | * ElementModifier} objects are invoked on the fly.
202 |  | *
203 |  | * @param source
204 |  | * is the <code>java.io.Reader</code> to read from.
205 |  | *
206 |  | * @return the newly created Document instance
207 |  | *
208 |  | * @throws DocumentException
209 |  | * DocumentException org.dom4j.DocumentException} if an error
210 |  | * occurs during parsing.
211 |  | */
212 | 0 | public Document modify(Reader source) throws DocumentException {
213 | 0 | try {
214 | 0 | return installModifyReader().read(source);
215 |  | } catch (SAXModifyException ex) {
216 | 0 | Throwable cause = ex.getCause();
217 | 0 | throw new DocumentException(cause.getMessage(), cause);
218 |  | }
219 |  | }
220 |  |
221 |  | /**
222 |  | * Reads a Document from the given {@link java.io.Reader}and writes it to
223 |  | * the specified {@link XMLWriter}using SAX. Registered {@link
224 |  | * ElementModifier} objects are invoked on the fly.
225 |  | *
226 |  | * @param source
227 |  | * is the <code>java.io.Reader</code> to read from.
228 |  | * @param systemId
229 |  | * DOCUMENT ME!
230 |  | *
231 |  | * @return the newly created Document instance
232 |  | *
233 |  | * @throws DocumentException
234 |  | * DocumentException org.dom4j.DocumentException} if an error
235 |  | * occurs during parsing.
236 |  | */
237 | 0 | public Document modify(Reader source, String systemId)
238 |  | throws DocumentException {
239 | 0 | try {
240 | 0 | return installModifyReader().read(source);
241 |  | } catch (SAXModifyException ex) {
242 | 0 | Throwable cause = ex.getCause();
243 | 0 | throw new DocumentException(cause.getMessage(), cause);
244 |  | }
245 |  | }
246 |  |
247 |  | /**
248 |  | * Reads a Document from the given {@link java.net.URL}and writes it to the
249 |  | * specified {@link XMLWriter}using SAX. Registered {@linkElementModifier}
250 |  | * objects are invoked on the fly.
251 |  | *
252 |  | * @param source
253 |  | * is the <code>java.net.URL</code> to read from.
254 |  | *
255 |  | * @return the newly created Document instance
256 |  | *
257 |  | * @throws DocumentException
258 |  | * DocumentException org.dom4j.DocumentException} if an error
259 |  | * occurs during parsing.
260 |  | */
261 | 0 | public Document modify(URL source) throws DocumentException {
262 | 0 | try {
263 | 0 | return installModifyReader().read(source);
264 |  | } catch (SAXModifyException ex) {
265 | 0 | Throwable cause = ex.getCause();
266 | 0 | throw new DocumentException(cause.getMessage(), cause);
267 |  | }
268 |  | }
269 |  |
270 |  | /**
271 |  | * Reads a Document from the given URL or filename and writes it to the
272 |  | * specified {@link XMLWriter}using SAX. Registered {@linkElementModifier}
273 |  | * objects are invoked on the fly.
274 |  | *
275 |  | * @param source
276 |  | * is the URL or filename to read from.
277 |  | *
278 |  | * @return the newly created Document instance
279 |  | *
280 |  | * @throws DocumentException
281 |  | * DocumentException org.dom4j.DocumentException} if an error
282 |  | * occurs during parsing.
283 |  | */
284 | 0 | public Document modify(String source) throws DocumentException {
285 | 0 | try {
286 | 0 | return installModifyReader().read(source);
287 |  | } catch (SAXModifyException ex) {
288 | 0 | Throwable cause = ex.getCause();
289 | 0 | throw new DocumentException(cause.getMessage(), cause);
290 |  | }
291 |  | }
292 |  |
293 |  | /**
294 |  | * Adds the {@link ElementModifier}to be called when the specified element
295 |  | * path is encounted while parsing the source.
296 |  | *
297 |  | * @param path
298 |  | * The element path to be handled
299 |  | * @param modifier
300 |  | * The {@link ElementModifier}to be called by the event based
301 |  | * processor.
302 |  | */
303 | 0 | public void addModifier(String path, ElementModifier modifier) {
304 | 0 | this.modifiers.put(path, modifier);
305 |  | }
306 |  |
307 |  | /**
308 |  | * Removes all registered {@link ElementModifier}instances from the event
309 |  | * based processor.
310 |  | */
311 | 0 | public void resetModifiers() {
312 | 0 | this.modifiers.clear();
313 | 0 | getSAXModifyReader().resetHandlers();
314 |  | }
315 |  |
316 |  | /**
317 |  | * Removes the {@link ElementModifier}from the event based processor, for
318 |  | * the specified element path.
319 |  | *
320 |  | * @param path
321 |  | * The path to remove the {@link ElementModifier}for.
322 |  | */
323 | 0 | public void removeModifier(String path) {
324 | 0 | this.modifiers.remove(path);
325 | 0 | getSAXModifyReader().removeHandler(path);
326 |  | }
327 |  |
328 |  | /**
329 |  | * Get the {@link org.dom4j.DocumentFactory}used to create the DOM4J
330 |  | * document structure
331 |  | *
332 |  | * @return <code>DocumentFactory</code> that will be used
333 |  | */
334 | 0 | public DocumentFactory getDocumentFactory() {
335 | 0 | return getSAXModifyReader().getDocumentFactory();
336 |  | }
337 |  |
338 |  | /**
339 |  | * Sets the {@link org.dom4j.DocumentFactory}used to create the DOM4J
340 |  | * document tree.
341 |  | *
342 |  | * @param factory
343 |  | * <code>DocumentFactory</code> to be used
344 |  | */
345 | 0 | public void setDocumentFactory(DocumentFactory factory) {
346 | 0 | getSAXModifyReader().setDocumentFactory(factory);
347 |  | }
348 |  |
349 |  | /**
350 |  | * Returns the current {@link XMLWriter}.
351 |  | *
352 |  | * @return XMLWriter
353 |  | */
354 | 0 | public XMLWriter getXMLWriter() {
355 | 0 | return this.xmlWriter;
356 |  | }
357 |  |
358 |  | /**
359 |  | * Sets the {@link XMLWriter}used to write the modified document.
360 |  | *
361 |  | * @param writer
362 |  | * The writer to use.
363 |  | */
364 | 0 | public void setXMLWriter(XMLWriter writer) {
365 | 0 | this.xmlWriter = writer;
366 |  | }
367 |  |
368 |  | /**
369 |  | * Returns true when xml elements are not kept in memory while parsing. The
370 |  | * {@link org.dom4j.Document}returned by the modify methods will be null.
371 |  | *
372 |  | * @return Returns the pruneElements.
373 |  | */
374 | 0 | public boolean isPruneElements() {
375 | 0 | return pruneElements;
376 |  | }
377 |  |
378 | 0 | private SAXReader installModifyReader() throws DocumentException {
379 | 0 | try {
380 | 0 | SAXModifyReader reader = getSAXModifyReader();
381 |  |
382 | 0 | if (isPruneElements()) {
383 | 0 | modifyReader.setDispatchHandler(new PruningDispatchHandler());
384 |  | }
385 |  |
386 | 0 | reader.resetHandlers();
387 |  |
388 | 0 | Iterator modifierIt = this.modifiers.entrySet().iterator();
389 |  |
390 | 0 | while (modifierIt.hasNext()) {
391 | 0 | Map.Entry entry = (Map.Entry) modifierIt.next();
392 |  |
393 | 0 | SAXModifyElementHandler handler = new SAXModifyElementHandler(
394 |  | (ElementModifier) entry.getValue());
395 | 0 | reader.addHandler((String) entry.getKey(), handler);
396 |  | }
397 |  |
398 | 0 | reader.setXMLWriter(getXMLWriter());
399 | 0 | reader.setXMLReader(getXMLReader());
400 |  |
401 | 0 | return reader;
402 |  | } catch (SAXException ex) {
403 | 0 | throw new DocumentException(ex.getMessage(), ex);
404 |  | }
405 |  | }
406 |  |
407 | 0 | private XMLReader getXMLReader() throws SAXException {
408 | 0 | if (this.xmlReader == null) {
409 | 0 | xmlReader = SAXHelper.createXMLReader(false);
410 |  | }
411 |  |
412 | 0 | return this.xmlReader;
413 |  | }
414 |  |
415 | 0 | private SAXModifyReader getSAXModifyReader() {
416 | 0 | if (modifyReader == null) {
417 | 0 | modifyReader = new SAXModifyReader();
418 |  | }
419 |  |
420 | 0 | return modifyReader;
421 |  | }
422 |  | }
423 |  |
424 |  | /*
425 |  | * Redistribution and use of this software and associated documentation
426 |  | * ("Software"), with or without modification, are permitted provided that the
427 |  | * following conditions are met:
428 |  | *
429 |  | * 1. Redistributions of source code must retain copyright statements and
430 |  | * notices. Redistributions must also contain a copy of this document.
431 |  | *
432 |  | * 2. Redistributions in binary form must reproduce the above copyright notice,
433 |  | * this list of conditions and the following disclaimer in the documentation
434 |  | * and/or other materials provided with the distribution.
435 |  | *
436 |  | * 3. The name "DOM4J" must not be used to endorse or promote products derived
437 |  | * from this Software without prior written permission of MetaStuff, Ltd. For
438 |  | * written permission, please contact dom4j-info@metastuff.com.
439 |  | *
440 |  | * 4. Products derived from this Software may not be called "DOM4J" nor may
441 |  | * "DOM4J" appear in their names without prior written permission of MetaStuff,
442 |  | * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
443 |  | *
444 |  | * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
445 |  | *
446 |  | * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
447 |  | * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
448 |  | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
449 |  | * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
450 |  | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
451 |  | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
452 |  | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
453 |  | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
454 |  | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
455 |  | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
456 |  | * POSSIBILITY OF SUCH DAMAGE.
457 |  | *
458 |  | * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
459 |  | */