Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.xml; |
| 20 | |
| 21 | import java.io.File; |
| 22 | import java.io.IOException; |
| 23 | import java.io.InputStream; |
| 24 | import java.net.URL; |
| 25 | import java.util.AbstractList; |
| 26 | import java.util.ArrayList; |
| 27 | import java.util.HashMap; |
| 28 | import java.util.Iterator; |
| 29 | import java.util.Map; |
| 30 | import java.util.NoSuchElementException; |
| 31 | import java.util.Stack; |
| 32 | import java.util.StringTokenizer; |
| 33 | |
| 34 | import javax.xml.parsers.SAXParser; |
| 35 | import javax.xml.parsers.SAXParserFactory; |
| 36 | |
| 37 | import org.eclipse.jetty.util.LazyList; |
| 38 | import org.eclipse.jetty.util.log.Log; |
| 39 | import org.eclipse.jetty.util.log.Logger; |
| 40 | import org.eclipse.jetty.util.resource.Resource; |
| 41 | import org.xml.sax.Attributes; |
| 42 | import org.xml.sax.ContentHandler; |
| 43 | import org.xml.sax.InputSource; |
| 44 | import org.xml.sax.SAXException; |
| 45 | import org.xml.sax.SAXParseException; |
| 46 | import org.xml.sax.XMLReader; |
| 47 | import org.xml.sax.helpers.DefaultHandler; |
| 48 | |
| 49 | /*--------------------------------------------------------------*/ |
| 50 | /** |
| 51 | * XML Parser wrapper. This class wraps any standard JAXP1.1 parser with convieniant error and |
| 52 | * entity handlers and a mini dom-like document tree. |
| 53 | * <P> |
| 54 | * By default, the parser is created as a validating parser only if xerces is present. This can be |
| 55 | * configured by setting the "org.eclipse.jetty.xml.XmlParser.Validating" system property. |
| 56 | * |
| 57 | * |
| 58 | */ |
| 59 | public class XmlParser |
| 60 | { |
| 61 | private static final Logger LOG = Log.getLogger(XmlParser.class); |
| 62 | |
| 63 | private Map<String,URL> _redirectMap = new HashMap<String,URL>(); |
| 64 | private SAXParser _parser; |
| 65 | private Map<String,ContentHandler> _observerMap; |
| 66 | private Stack<ContentHandler> _observers = new Stack<ContentHandler>(); |
| 67 | private String _xpath; |
| 68 | private Object _xpaths; |
| 69 | private String _dtd; |
| 70 | |
| 71 | /* ------------------------------------------------------------ */ |
| 72 | /** |
| 73 | * Construct |
| 74 | */ |
| 75 | public XmlParser() |
| 76 | { |
| 77 | SAXParserFactory factory = SAXParserFactory.newInstance(); |
| 78 | boolean validating_dft = factory.getClass().toString().startsWith("org.apache.xerces."); |
| 79 | String validating_prop = System.getProperty("org.eclipse.jetty.xml.XmlParser.Validating", validating_dft ? "true" : "false"); |
| 80 | boolean validating = Boolean.valueOf(validating_prop).booleanValue(); |
| 81 | setValidating(validating); |
| 82 | } |
| 83 | |
| 84 | /* ------------------------------------------------------------ */ |
| 85 | /** |
| 86 | * Constructor. |
| 87 | */ |
| 88 | public XmlParser(boolean validating) |
| 89 | { |
| 90 | setValidating(validating); |
| 91 | } |
| 92 | |
| 93 | /* ------------------------------------------------------------ */ |
| 94 | public void setValidating(boolean validating) |
| 95 | { |
| 96 | try |
| 97 | { |
| 98 | SAXParserFactory factory = SAXParserFactory.newInstance(); |
| 99 | factory.setValidating(validating); |
| 100 | _parser = factory.newSAXParser(); |
| 101 | |
| 102 | try |
| 103 | { |
| 104 | if (validating) |
| 105 | _parser.getXMLReader().setFeature("http://apache.org/xml/features/validation/schema", validating); |
| 106 | } |
| 107 | catch (Exception e) |
| 108 | { |
| 109 | if (validating) |
| 110 | LOG.warn("Schema validation may not be supported: ", e); |
| 111 | else |
| 112 | LOG.ignore(e); |
| 113 | } |
| 114 | |
| 115 | _parser.getXMLReader().setFeature("http://xml.org/sax/features/validation", validating); |
| 116 | _parser.getXMLReader().setFeature("http://xml.org/sax/features/namespaces", true); |
| 117 | _parser.getXMLReader().setFeature("http://xml.org/sax/features/namespace-prefixes", false); |
| 118 | try |
| 119 | { |
| 120 | if (validating) |
| 121 | _parser.getXMLReader().setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", validating); |
| 122 | } |
| 123 | catch (Exception e) |
| 124 | { |
| 125 | LOG.warn(e.getMessage()); |
| 126 | } |
| 127 | } |
| 128 | catch (Exception e) |
| 129 | { |
| 130 | LOG.warn(Log.EXCEPTION, e); |
| 131 | throw new Error(e.toString()); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | /* ------------------------------------------------------------ */ |
| 136 | /** |
| 137 | * @param name |
| 138 | * @param entity |
| 139 | */ |
| 140 | public synchronized void redirectEntity(String name, URL entity) |
| 141 | { |
| 142 | if (entity != null) |
| 143 | _redirectMap.put(name, entity); |
| 144 | } |
| 145 | |
| 146 | /* ------------------------------------------------------------ */ |
| 147 | /** |
| 148 | * |
| 149 | * @return Returns the xpath. |
| 150 | */ |
| 151 | public String getXpath() |
| 152 | { |
| 153 | return _xpath; |
| 154 | } |
| 155 | |
| 156 | /* ------------------------------------------------------------ */ |
| 157 | /** |
| 158 | * Set an XPath A very simple subset of xpath is supported to select a partial tree. Currently |
| 159 | * only path like "/node1/nodeA | /node1/nodeB" are supported. |
| 160 | * |
| 161 | * @param xpath The xpath to set. |
| 162 | */ |
| 163 | public void setXpath(String xpath) |
| 164 | { |
| 165 | _xpath = xpath; |
| 166 | StringTokenizer tok = new StringTokenizer(xpath, "| "); |
| 167 | while (tok.hasMoreTokens()) |
| 168 | _xpaths = LazyList.add(_xpaths, tok.nextToken()); |
| 169 | } |
| 170 | |
| 171 | /* ------------------------------------------------------------ */ |
| 172 | public String getDTD() |
| 173 | { |
| 174 | return _dtd; |
| 175 | } |
| 176 | |
| 177 | /* ------------------------------------------------------------ */ |
| 178 | /** |
| 179 | * Add a ContentHandler. Add an additional _content handler that is triggered on a tag name. SAX |
| 180 | * events are passed to the ContentHandler provided from a matching start element to the |
| 181 | * corresponding end element. Only a single _content handler can be registered against each tag. |
| 182 | * |
| 183 | * @param trigger Tag local or q name. |
| 184 | * @param observer SAX ContentHandler |
| 185 | */ |
| 186 | public synchronized void addContentHandler(String trigger, ContentHandler observer) |
| 187 | { |
| 188 | if (_observerMap == null) |
| 189 | _observerMap = new HashMap(); |
| 190 | _observerMap.put(trigger, observer); |
| 191 | } |
| 192 | |
| 193 | /* ------------------------------------------------------------ */ |
| 194 | public synchronized Node parse(InputSource source) throws IOException, SAXException |
| 195 | { |
| 196 | _dtd=null; |
| 197 | Handler handler = new Handler(); |
| 198 | XMLReader reader = _parser.getXMLReader(); |
| 199 | reader.setContentHandler(handler); |
| 200 | reader.setErrorHandler(handler); |
| 201 | reader.setEntityResolver(handler); |
| 202 | if (LOG.isDebugEnabled()) |
| 203 | LOG.debug("parsing: sid=" + source.getSystemId() + ",pid=" + source.getPublicId()); |
| 204 | _parser.parse(source, handler); |
| 205 | if (handler._error != null) |
| 206 | throw handler._error; |
| 207 | Node doc = (Node) handler._top.get(0); |
| 208 | handler.clear(); |
| 209 | return doc; |
| 210 | } |
| 211 | |
| 212 | /* ------------------------------------------------------------ */ |
| 213 | /** |
| 214 | * Parse String URL. |
| 215 | */ |
| 216 | public synchronized Node parse(String url) throws IOException, SAXException |
| 217 | { |
| 218 | if (LOG.isDebugEnabled()) |
| 219 | LOG.debug("parse: " + url); |
| 220 | return parse(new InputSource(url)); |
| 221 | } |
| 222 | |
| 223 | /* ------------------------------------------------------------ */ |
| 224 | /** |
| 225 | * Parse File. |
| 226 | */ |
| 227 | public synchronized Node parse(File file) throws IOException, SAXException |
| 228 | { |
| 229 | if (LOG.isDebugEnabled()) |
| 230 | LOG.debug("parse: " + file); |
| 231 | return parse(new InputSource(Resource.toURL(file).toString())); |
| 232 | } |
| 233 | |
| 234 | /* ------------------------------------------------------------ */ |
| 235 | /** |
| 236 | * Parse InputStream. |
| 237 | */ |
| 238 | public synchronized Node parse(InputStream in) throws IOException, SAXException |
| 239 | { |
| 240 | _dtd=null; |
| 241 | Handler handler = new Handler(); |
| 242 | XMLReader reader = _parser.getXMLReader(); |
| 243 | reader.setContentHandler(handler); |
| 244 | reader.setErrorHandler(handler); |
| 245 | reader.setEntityResolver(handler); |
| 246 | _parser.parse(new InputSource(in), handler); |
| 247 | if (handler._error != null) |
| 248 | throw handler._error; |
| 249 | Node doc = (Node) handler._top.get(0); |
| 250 | handler.clear(); |
| 251 | return doc; |
| 252 | } |
| 253 | |
| 254 | /* ------------------------------------------------------------ */ |
| 255 | /* ------------------------------------------------------------ */ |
| 256 | private class NoopHandler extends DefaultHandler |
| 257 | { |
| 258 | Handler _next; |
| 259 | int _depth; |
| 260 | |
| 261 | NoopHandler(Handler next) |
| 262 | { |
| 263 | this._next = next; |
| 264 | } |
| 265 | |
| 266 | /* ------------------------------------------------------------ */ |
| 267 | public void startElement(String uri, String localName, String qName, Attributes attrs) throws SAXException |
| 268 | { |
| 269 | _depth++; |
| 270 | } |
| 271 | |
| 272 | /* ------------------------------------------------------------ */ |
| 273 | public void endElement(String uri, String localName, String qName) throws SAXException |
| 274 | { |
| 275 | if (_depth == 0) |
| 276 | _parser.getXMLReader().setContentHandler(_next); |
| 277 | else |
| 278 | _depth--; |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | /* ------------------------------------------------------------ */ |
| 283 | /* ------------------------------------------------------------ */ |
| 284 | private class Handler extends DefaultHandler |
| 285 | { |
| 286 | Node _top = new Node(null, null, null); |
| 287 | SAXParseException _error; |
| 288 | private Node _context = _top; |
| 289 | private NoopHandler _noop; |
| 290 | |
| 291 | Handler() |
| 292 | { |
| 293 | _noop = new NoopHandler(this); |
| 294 | } |
| 295 | |
| 296 | /* ------------------------------------------------------------ */ |
| 297 | void clear() |
| 298 | { |
| 299 | _top = null; |
| 300 | _error = null; |
| 301 | _context = null; |
| 302 | } |
| 303 | |
| 304 | /* ------------------------------------------------------------ */ |
| 305 | public void startElement(String uri, String localName, String qName, Attributes attrs) throws SAXException |
| 306 | { |
| 307 | String name = null; |
| 308 | if (_parser.isNamespaceAware()) |
| 309 | name = localName; |
| 310 | |
| 311 | if (name == null || "".equals(name)) |
| 312 | name = qName; |
| 313 | |
| 314 | Node node = new Node(_context, name, attrs); |
| 315 | |
| 316 | |
| 317 | // check if the node matches any xpaths set? |
| 318 | if (_xpaths != null) |
| 319 | { |
| 320 | String path = node.getPath(); |
| 321 | boolean match = false; |
| 322 | for (int i = LazyList.size(_xpaths); !match && i-- > 0;) |
| 323 | { |
| 324 | String xpath = (String) LazyList.get(_xpaths, i); |
| 325 | |
| 326 | match = path.equals(xpath) || xpath.startsWith(path) && xpath.length() > path.length() && xpath.charAt(path.length()) == '/'; |
| 327 | } |
| 328 | |
| 329 | if (match) |
| 330 | { |
| 331 | _context.add(node); |
| 332 | _context = node; |
| 333 | } |
| 334 | else |
| 335 | { |
| 336 | _parser.getXMLReader().setContentHandler(_noop); |
| 337 | } |
| 338 | } |
| 339 | else |
| 340 | { |
| 341 | _context.add(node); |
| 342 | _context = node; |
| 343 | } |
| 344 | |
| 345 | ContentHandler observer = null; |
| 346 | if (_observerMap != null) |
| 347 | observer = (ContentHandler) _observerMap.get(name); |
| 348 | _observers.push(observer); |
| 349 | |
| 350 | for (int i = 0; i < _observers.size(); i++) |
| 351 | if (_observers.get(i) != null) |
| 352 | ((ContentHandler) _observers.get(i)).startElement(uri, localName, qName, attrs); |
| 353 | } |
| 354 | |
| 355 | /* ------------------------------------------------------------ */ |
| 356 | public void endElement(String uri, String localName, String qName) throws SAXException |
| 357 | { |
| 358 | _context = _context._parent; |
| 359 | for (int i = 0; i < _observers.size(); i++) |
| 360 | if (_observers.get(i) != null) |
| 361 | ((ContentHandler) _observers.get(i)).endElement(uri, localName, qName); |
| 362 | _observers.pop(); |
| 363 | } |
| 364 | |
| 365 | /* ------------------------------------------------------------ */ |
| 366 | public void ignorableWhitespace(char buf[], int offset, int len) throws SAXException |
| 367 | { |
| 368 | for (int i = 0; i < _observers.size(); i++) |
| 369 | if (_observers.get(i) != null) |
| 370 | ((ContentHandler) _observers.get(i)).ignorableWhitespace(buf, offset, len); |
| 371 | } |
| 372 | |
| 373 | /* ------------------------------------------------------------ */ |
| 374 | public void characters(char buf[], int offset, int len) throws SAXException |
| 375 | { |
| 376 | _context.add(new String(buf, offset, len)); |
| 377 | for (int i = 0; i < _observers.size(); i++) |
| 378 | if (_observers.get(i) != null) |
| 379 | ((ContentHandler) _observers.get(i)).characters(buf, offset, len); |
| 380 | } |
| 381 | |
| 382 | /* ------------------------------------------------------------ */ |
| 383 | public void warning(SAXParseException ex) |
| 384 | { |
| 385 | LOG.debug(Log.EXCEPTION, ex); |
| 386 | LOG.warn("WARNING@" + getLocationString(ex) + " : " + ex.toString()); |
| 387 | } |
| 388 | |
| 389 | /* ------------------------------------------------------------ */ |
| 390 | public void error(SAXParseException ex) throws SAXException |
| 391 | { |
| 392 | // Save error and continue to report other errors |
| 393 | if (_error == null) |
| 394 | _error = ex; |
| 395 | LOG.debug(Log.EXCEPTION, ex); |
| 396 | LOG.warn("ERROR@" + getLocationString(ex) + " : " + ex.toString()); |
| 397 | } |
| 398 | |
| 399 | /* ------------------------------------------------------------ */ |
| 400 | public void fatalError(SAXParseException ex) throws SAXException |
| 401 | { |
| 402 | _error = ex; |
| 403 | LOG.debug(Log.EXCEPTION, ex); |
| 404 | LOG.warn("FATAL@" + getLocationString(ex) + " : " + ex.toString()); |
| 405 | throw ex; |
| 406 | } |
| 407 | |
| 408 | /* ------------------------------------------------------------ */ |
| 409 | private String getLocationString(SAXParseException ex) |
| 410 | { |
| 411 | return ex.getSystemId() + " line:" + ex.getLineNumber() + " col:" + ex.getColumnNumber(); |
| 412 | } |
| 413 | |
| 414 | /* ------------------------------------------------------------ */ |
| 415 | public InputSource resolveEntity(String pid, String sid) |
| 416 | { |
| 417 | if (LOG.isDebugEnabled()) |
| 418 | LOG.debug("resolveEntity(" + pid + ", " + sid + ")"); |
| 419 | |
| 420 | if (sid!=null && sid.endsWith(".dtd")) |
| 421 | _dtd=sid; |
| 422 | |
| 423 | URL entity = null; |
| 424 | if (pid != null) |
| 425 | entity = (URL) _redirectMap.get(pid); |
| 426 | if (entity == null) |
| 427 | entity = (URL) _redirectMap.get(sid); |
| 428 | if (entity == null) |
| 429 | { |
| 430 | String dtd = sid; |
| 431 | if (dtd.lastIndexOf('/') >= 0) |
| 432 | dtd = dtd.substring(dtd.lastIndexOf('/') + 1); |
| 433 | |
| 434 | if (LOG.isDebugEnabled()) |
| 435 | LOG.debug("Can't exact match entity in redirect map, trying " + dtd); |
| 436 | entity = (URL) _redirectMap.get(dtd); |
| 437 | } |
| 438 | |
| 439 | if (entity != null) |
| 440 | { |
| 441 | try |
| 442 | { |
| 443 | InputStream in = entity.openStream(); |
| 444 | if (LOG.isDebugEnabled()) |
| 445 | LOG.debug("Redirected entity " + sid + " --> " + entity); |
| 446 | InputSource is = new InputSource(in); |
| 447 | is.setSystemId(sid); |
| 448 | return is; |
| 449 | } |
| 450 | catch (IOException e) |
| 451 | { |
| 452 | LOG.ignore(e); |
| 453 | } |
| 454 | } |
| 455 | return null; |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | /* ------------------------------------------------------------ */ |
| 460 | /* ------------------------------------------------------------ */ |
| 461 | /** |
| 462 | * XML Attribute. |
| 463 | */ |
| 464 | public static class Attribute |
| 465 | { |
| 466 | private String _name; |
| 467 | private String _value; |
| 468 | |
| 469 | Attribute(String n, String v) |
| 470 | { |
| 471 | _name = n; |
| 472 | _value = v; |
| 473 | } |
| 474 | |
| 475 | public String getName() |
| 476 | { |
| 477 | return _name; |
| 478 | } |
| 479 | |
| 480 | public String getValue() |
| 481 | { |
| 482 | return _value; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | /* ------------------------------------------------------------ */ |
| 487 | /* ------------------------------------------------------------ */ |
| 488 | /** |
| 489 | * XML Node. Represents an XML element with optional attributes and ordered content. |
| 490 | */ |
| 491 | public static class Node extends AbstractList<Object> |
| 492 | { |
| 493 | Node _parent; |
| 494 | private ArrayList<Object> _list; |
| 495 | private String _tag; |
| 496 | private Attribute[] _attrs; |
| 497 | private boolean _lastString = false; |
| 498 | private String _path; |
| 499 | |
| 500 | /* ------------------------------------------------------------ */ |
| 501 | Node(Node parent, String tag, Attributes attrs) |
| 502 | { |
| 503 | _parent = parent; |
| 504 | _tag = tag; |
| 505 | |
| 506 | if (attrs != null) |
| 507 | { |
| 508 | _attrs = new Attribute[attrs.getLength()]; |
| 509 | for (int i = 0; i < attrs.getLength(); i++) |
| 510 | { |
| 511 | String name = attrs.getLocalName(i); |
| 512 | if (name == null || name.equals("")) |
| 513 | name = attrs.getQName(i); |
| 514 | _attrs[i] = new Attribute(name, attrs.getValue(i)); |
| 515 | } |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | /* ------------------------------------------------------------ */ |
| 520 | public Node getParent() |
| 521 | { |
| 522 | return _parent; |
| 523 | } |
| 524 | |
| 525 | /* ------------------------------------------------------------ */ |
| 526 | public String getTag() |
| 527 | { |
| 528 | return _tag; |
| 529 | } |
| 530 | |
| 531 | /* ------------------------------------------------------------ */ |
| 532 | public String getPath() |
| 533 | { |
| 534 | if (_path == null) |
| 535 | { |
| 536 | if (getParent() != null && getParent().getTag() != null) |
| 537 | _path = getParent().getPath() + "/" + _tag; |
| 538 | else |
| 539 | _path = "/" + _tag; |
| 540 | } |
| 541 | return _path; |
| 542 | } |
| 543 | |
| 544 | /* ------------------------------------------------------------ */ |
| 545 | /** |
| 546 | * Get an array of element attributes. |
| 547 | */ |
| 548 | public Attribute[] getAttributes() |
| 549 | { |
| 550 | return _attrs; |
| 551 | } |
| 552 | |
| 553 | /* ------------------------------------------------------------ */ |
| 554 | /** |
| 555 | * Get an element attribute. |
| 556 | * |
| 557 | * @return attribute or null. |
| 558 | */ |
| 559 | public String getAttribute(String name) |
| 560 | { |
| 561 | return getAttribute(name, null); |
| 562 | } |
| 563 | |
| 564 | /* ------------------------------------------------------------ */ |
| 565 | /** |
| 566 | * Get an element attribute. |
| 567 | * |
| 568 | * @return attribute or null. |
| 569 | */ |
| 570 | public String getAttribute(String name, String dft) |
| 571 | { |
| 572 | if (_attrs == null || name == null) |
| 573 | return dft; |
| 574 | for (int i = 0; i < _attrs.length; i++) |
| 575 | if (name.equals(_attrs[i].getName())) |
| 576 | return _attrs[i].getValue(); |
| 577 | return dft; |
| 578 | } |
| 579 | |
| 580 | /* ------------------------------------------------------------ */ |
| 581 | /** |
| 582 | * Get the number of children nodes. |
| 583 | */ |
| 584 | public int size() |
| 585 | { |
| 586 | if (_list != null) |
| 587 | return _list.size(); |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | /* ------------------------------------------------------------ */ |
| 592 | /** |
| 593 | * Get the ith child node or content. |
| 594 | * |
| 595 | * @return Node or String. |
| 596 | */ |
| 597 | public Object get(int i) |
| 598 | { |
| 599 | if (_list != null) |
| 600 | return _list.get(i); |
| 601 | return null; |
| 602 | } |
| 603 | |
| 604 | /* ------------------------------------------------------------ */ |
| 605 | /** |
| 606 | * Get the first child node with the tag. |
| 607 | * |
| 608 | * @param tag |
| 609 | * @return Node or null. |
| 610 | */ |
| 611 | public Node get(String tag) |
| 612 | { |
| 613 | if (_list != null) |
| 614 | { |
| 615 | for (int i = 0; i < _list.size(); i++) |
| 616 | { |
| 617 | Object o = _list.get(i); |
| 618 | if (o instanceof Node) |
| 619 | { |
| 620 | Node n = (Node) o; |
| 621 | if (tag.equals(n._tag)) |
| 622 | return n; |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | return null; |
| 627 | } |
| 628 | |
| 629 | /* ------------------------------------------------------------ */ |
| 630 | @Override |
| 631 | public void add(int i, Object o) |
| 632 | { |
| 633 | if (_list == null) |
| 634 | _list = new ArrayList<Object>(); |
| 635 | if (o instanceof String) |
| 636 | { |
| 637 | if (_lastString) |
| 638 | { |
| 639 | int last = _list.size() - 1; |
| 640 | _list.set(last, (String) _list.get(last) + o); |
| 641 | } |
| 642 | else |
| 643 | _list.add(i, o); |
| 644 | _lastString = true; |
| 645 | } |
| 646 | else |
| 647 | { |
| 648 | _lastString = false; |
| 649 | _list.add(i, o); |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | /* ------------------------------------------------------------ */ |
| 654 | public void clear() |
| 655 | { |
| 656 | if (_list != null) |
| 657 | _list.clear(); |
| 658 | _list = null; |
| 659 | } |
| 660 | |
| 661 | /* ------------------------------------------------------------ */ |
| 662 | /** |
| 663 | * Get a tag as a string. |
| 664 | * |
| 665 | * @param tag The tag to get |
| 666 | * @param tags IF true, tags are included in the value. |
| 667 | * @param trim If true, trim the value. |
| 668 | * @return results of get(tag).toString(tags). |
| 669 | */ |
| 670 | public String getString(String tag, boolean tags, boolean trim) |
| 671 | { |
| 672 | Node node = get(tag); |
| 673 | if (node == null) |
| 674 | return null; |
| 675 | String s = node.toString(tags); |
| 676 | if (s != null && trim) |
| 677 | s = s.trim(); |
| 678 | return s; |
| 679 | } |
| 680 | |
| 681 | /* ------------------------------------------------------------ */ |
| 682 | public synchronized String toString() |
| 683 | { |
| 684 | return toString(true); |
| 685 | } |
| 686 | |
| 687 | /* ------------------------------------------------------------ */ |
| 688 | /** |
| 689 | * Convert to a string. |
| 690 | * |
| 691 | * @param tag If false, only _content is shown. |
| 692 | */ |
| 693 | public synchronized String toString(boolean tag) |
| 694 | { |
| 695 | StringBuilder buf = new StringBuilder(); |
| 696 | toString(buf, tag); |
| 697 | return buf.toString(); |
| 698 | } |
| 699 | |
| 700 | /* ------------------------------------------------------------ */ |
| 701 | /** |
| 702 | * Convert to a string. |
| 703 | * |
| 704 | * @param tag If false, only _content is shown. |
| 705 | */ |
| 706 | public synchronized String toString(boolean tag, boolean trim) |
| 707 | { |
| 708 | String s = toString(tag); |
| 709 | if (s != null && trim) |
| 710 | s = s.trim(); |
| 711 | return s; |
| 712 | } |
| 713 | |
| 714 | /* ------------------------------------------------------------ */ |
| 715 | private synchronized void toString(StringBuilder buf, boolean tag) |
| 716 | { |
| 717 | if (tag) |
| 718 | { |
| 719 | buf.append("<"); |
| 720 | buf.append(_tag); |
| 721 | |
| 722 | if (_attrs != null) |
| 723 | { |
| 724 | for (int i = 0; i < _attrs.length; i++) |
| 725 | { |
| 726 | buf.append(' '); |
| 727 | buf.append(_attrs[i].getName()); |
| 728 | buf.append("=\""); |
| 729 | buf.append(_attrs[i].getValue()); |
| 730 | buf.append("\""); |
| 731 | } |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | if (_list != null) |
| 736 | { |
| 737 | if (tag) |
| 738 | buf.append(">"); |
| 739 | for (int i = 0; i < _list.size(); i++) |
| 740 | { |
| 741 | Object o = _list.get(i); |
| 742 | if (o == null) |
| 743 | continue; |
| 744 | if (o instanceof Node) |
| 745 | ((Node) o).toString(buf, tag); |
| 746 | else |
| 747 | buf.append(o.toString()); |
| 748 | } |
| 749 | if (tag) |
| 750 | { |
| 751 | buf.append("</"); |
| 752 | buf.append(_tag); |
| 753 | buf.append(">"); |
| 754 | } |
| 755 | } |
| 756 | else if (tag) |
| 757 | buf.append("/>"); |
| 758 | } |
| 759 | |
| 760 | /* ------------------------------------------------------------ */ |
| 761 | /** |
| 762 | * Iterator over named child nodes. |
| 763 | * |
| 764 | * @param tag The tag of the nodes. |
| 765 | * @return Iterator over all child nodes with the specified tag. |
| 766 | */ |
| 767 | public Iterator<Node> iterator(final String tag) |
| 768 | { |
| 769 | return new Iterator<Node>() |
| 770 | { |
| 771 | int c = 0; |
| 772 | Node _node; |
| 773 | |
| 774 | /* -------------------------------------------------- */ |
| 775 | public boolean hasNext() |
| 776 | { |
| 777 | if (_node != null) |
| 778 | return true; |
| 779 | while (_list != null && c < _list.size()) |
| 780 | { |
| 781 | Object o = _list.get(c); |
| 782 | if (o instanceof Node) |
| 783 | { |
| 784 | Node n = (Node) o; |
| 785 | if (tag.equals(n._tag)) |
| 786 | { |
| 787 | _node = n; |
| 788 | return true; |
| 789 | } |
| 790 | } |
| 791 | c++; |
| 792 | } |
| 793 | return false; |
| 794 | } |
| 795 | |
| 796 | /* -------------------------------------------------- */ |
| 797 | public Node next() |
| 798 | { |
| 799 | try |
| 800 | { |
| 801 | if (hasNext()) |
| 802 | return _node; |
| 803 | throw new NoSuchElementException(); |
| 804 | } |
| 805 | finally |
| 806 | { |
| 807 | _node = null; |
| 808 | c++; |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | /* -------------------------------------------------- */ |
| 813 | public void remove() |
| 814 | { |
| 815 | throw new UnsupportedOperationException("Not supported"); |
| 816 | } |
| 817 | }; |
| 818 | } |
| 819 | } |
| 820 | } |