- 001
/* - 002
* Copyright 1999-2004 The Apache Software Foundation. - 003 *
- 004 * Licensed under the Apache License, Version 2.0 (the "License");
- 005 * you may not use this file except in compliance with the License.
- 006 * You may obtain a copy of the License at
- 007 *
- 008 * http://www.apache.org/licenses/LICENSE-2.0
- 009 *
- 010 * Unless required by applicable law or agreed to in writing, software
- 011 * distributed under the License is distributed on an "AS IS" BASIS,
- 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- 013 * See the License for the specific language governing permissions and
- 014 * limitations under the License.
- 015
*/ - 016/*
- 017 * $Id: StylesheetPIHandler.java,v 1.2.4.1 2005/09/15 08:15:57 suresh_emailid Exp $
- 018 */
- 019
package com.sun.org.apache.xml.internal.utils; - 020
- 021import java.util.StringTokenizer;
- 022import java.util.Vector;
- 023
- 024import javax.xml.transform.Source;
- 025import javax.xml.transform.TransformerException;
- 026import javax.xml.transform.URIResolver;
- 027import javax.xml.transform.sax.SAXSource;
- 028
- 029import com.sun.org.apache.xml.internal.utils.SystemIDResolver;
- 030
- 031import org.xml.sax.Attributes;
- 032import org.xml.sax.InputSource;
- 033import org.xml.sax.helpers.DefaultHandler;
- 034
- 035/**
- 036 * Search for the xml-stylesheet processing instructions in an XML document.
- 037 * @see <a href="http://www.w3.org/TR/xml-stylesheet/">Associating Style Sheets with XML documents, Version 1.0</a>
- 038 */
- 039public class StylesheetPIHandler extends DefaultHandler
- 040{
- 041 /** The baseID of the document being processed. */
- 042 String m_baseID;
- 043
- 044 /** The desired media criteria. */
- 045 String m_media;
- 046
- 047 /** The desired title criteria. */
- 048 String m_title;
- 049
- 050 /** The desired character set criteria. */
- 051 String m_charset;
- 052
- 053 /** A list of SAXSource objects that match the criteria. */
- 054 Vector m_stylesheets = new Vector();
- 055
- 056 // Add code to use a URIResolver. Patch from Dmitri Ilyin.
- 057
- 058 /**
- 059 * The object that implements the URIResolver interface,
- 060 * or null.
- 061 */
- 062 URIResolver m_uriResolver;
- 063
- 064 /**
- 065 * Get the object that will be used to resolve URIs in href
- 066 * in xml-stylesheet processing instruction.
- 067 *
- 068 * @param resolver An object that implements the URIResolver interface,
- 069 * or null.
- 070 */
- 071 public void setURIResolver(URIResolver resolver)
- 072 {
- 073 m_uriResolver = resolver;
- 074 }
- 075
- 076 /**
- 077 * Get the object that will be used to resolve URIs in href
- 078 * in xml-stylesheet processing instruction.
- 079 *
- 080 * @return The URIResolver that was set with setURIResolver.
- 081 */
- 082 public URIResolver getURIResolver()
- 083 {
- 084 return m_uriResolver;
- 085 }
- 086
- 087 /**
- 088 * Construct a StylesheetPIHandler instance that will search
- 089 * for xml-stylesheet PIs based on the given criteria.
- 090 *
- 091 * @param baseID The base ID of the XML document, needed to resolve
- 092 * relative IDs.
- 093 * @param media The desired media criteria.
- 094 * @param title The desired title criteria.
- 095 * @param charset The desired character set criteria.
- 096 */
- 097 public StylesheetPIHandler(String baseID, String media, String title,
- 098 String charset)
- 099 {
- 100
- 101 m_baseID = baseID;
- 102 m_media = media;
- 103 m_title = title;
- 104 m_charset = charset;
- 105 }
- 106
- 107 /**
- 108 * Return the last stylesheet found that match the constraints.
- 109 *
- 110 * @return Source object that references the last stylesheet reference
- 111 * that matches the constraints.
- 112 */
- 113 public Source getAssociatedStylesheet()
- 114 {
- 115
- 116 int sz = m_stylesheets.size();
- 117
- 118 if (sz > 0)
- 119 {
- 120 Source source = (Source) m_stylesheets.elementAt(sz-1);
- 121 return source;
- 122 }
- 123 else
- 124 return null;
- 125 }
- 126
- 127 /**
- 128 * Handle the xml-stylesheet processing instruction.
- 129 *
- 130 * @param target The processing instruction target.
- 131 * @param data The processing instruction data, or null if
- 132 * none is supplied.
- 133 * @throws org.xml.sax.SAXException Any SAX exception, possibly
- 134 * wrapping another exception.
- 135 * @see org.xml.sax.ContentHandler#processingInstruction
- 136 * @see <a href="http://www.w3.org/TR/xml-stylesheet/">Associating Style Sheets with XML documents, Version 1.0</a>
- 137 */
- 138 public void processingInstruction(String target, String data)
- 139 throws org.xml.sax.SAXException
- 140 {
- 141
- 142 if (target.equals("xml-stylesheet"))
- 143 {
- 144 String href = null; // CDATA #REQUIRED
- 145 String type = null; // CDATA #REQUIRED
- 146 String title = null; // CDATA #IMPLIED
- 147 String media = null; // CDATA #IMPLIED
- 148 String charset = null; // CDATA #IMPLIED
- 149 boolean alternate = false; // (yes|no) "no"
- 150 StringTokenizer tokenizer = new StringTokenizer(data, " \t=\n", true);
- 151 boolean lookedAhead = false;
- 152 Source source = null;
- 153
- 154 String token = "";
- 155 while (tokenizer.hasMoreTokens())
- 156 {
- 157 if (!lookedAhead)
- 158 token = tokenizer.nextToken();
- 159 else
- 160 lookedAhead = false;
- 161 if (tokenizer.hasMoreTokens() &&
- 162 (token.equals(" ") || token.equals("\t") || token.equals("=")))
- 163 continue;
- 164
- 165 String name = token;
- 166 if (name.equals("type"))
- 167 {
- 168 token = tokenizer.nextToken();
- 169 while (tokenizer.hasMoreTokens() &&
- 170 (token.equals(" " ) || token.equals("\t") || token.equals("=")))
- 171 token = tokenizer.nextToken();
- 172 type = token.substring(1, token.length() - 1);
- 173
- 174 }
- 175 else if (name.equals("href"))
- 176 {
- 177 token = tokenizer.nextToken();
- 178 while (tokenizer.hasMoreTokens() &&
- 179 (token.equals(" " ) || token.equals("\t") || token.equals("=")))
- 180 token = tokenizer.nextToken();
- 181 href = token;
- 182 if (tokenizer.hasMoreTokens())
- 183 {
- 184 token = tokenizer.nextToken();
- 185 // If the href value has parameters to be passed to a
- 186 // servlet(something like "foobar?id=12..."),
- 187 // we want to make sure we get them added to
- 188 // the href value. Without this check, we would move on
- 189 // to try to process another attribute and that would be
- 190 // wrong.
- 191 // We need to set lookedAhead here to flag that we
- 192 // already have the next token.
- 193 while ( token.equals("=") && tokenizer.hasMoreTokens())
- 194 {
- 195 href = href + token + tokenizer.nextToken();
- 196 if (tokenizer.hasMoreTokens())
- 197 {
- 198 token = tokenizer.nextToken();
- 199 lookedAhead = true;
- 200 }
- 201 else
- 202 {
- 203 break;
- 204 }
- 205 }
- 206 }
- 207 href = href.substring(1, href.length() - 1);
- 208 try
- 209 {
- 210 // Add code to use a URIResolver. Patch from Dmitri Ilyin.
- 211 if (m_uriResolver != null)
- 212 {
- 213 source = m_uriResolver.resolve(href, m_baseID);
- 214 }
- 215 else
- 216 {
- 217 href = SystemIDResolver.getAbsoluteURI(href, m_baseID);
- 218 source = new SAXSource(new InputSource(href));
- 219 }
- 220 }
- 221 catch(TransformerException te)
- 222 {
- 223 throw new org.xml.sax.SAXException(te);
- 224 }
- 225 }
- 226 else if (name.equals("title"))
- 227 {
- 228 token = tokenizer.nextToken();
- 229 while (tokenizer.hasMoreTokens() &&
- 230 (token.equals(" " ) || token.equals("\t") || token.equals("=")))
- 231 token = tokenizer.nextToken();
- 232 title = token.substring(1, token.length() - 1);
- 233 }
- 234 else if (name.equals("media"))
- 235 {
- 236 token = tokenizer.nextToken();
- 237 while (tokenizer.hasMoreTokens() &&
- 238 (token.equals(" " ) || token.equals("\t") || token.equals("=")))
- 239 token = tokenizer.nextToken();
- 240 media = token.substring(1, token.length() - 1);
- 241 }
- 242 else if (name.equals("charset"))
- 243 {
- 244 token = tokenizer.nextToken();
- 245 while (tokenizer.hasMoreTokens() &&
- 246 (token.equals(" " ) || token.equals("\t") || token.equals("=")))
- 247 token = tokenizer.nextToken();
- 248 charset = token.substring(1, token.length() - 1);
- 249 }
- 250 else if (name.equals("alternate"))
- 251 {
- 252 token = tokenizer.nextToken();
- 253 while (tokenizer.hasMoreTokens() &&
- 254 (token.equals(" " ) || token.equals("\t") || token.equals("=")))
- 255 token = tokenizer.nextToken();
- 256 alternate = token.substring(1, token.length()
- 257 - 1).equals("yes");
- 258 }
- 259
- 260 }
- 261
- 262 if ((null != type)
- 263 && (type.equals("text/xsl") || type.equals("text/xml") || type.equals("application/xml+xslt"))
- 264 && (null != href))
- 265 {
- 266 if (null != m_media)
- 267 {
- 268 if (null != media)
- 269 {
- 270 if (!media.equals(m_media))
- 271 return;
- 272 }
- 273 else
- 274 return;
- 275 }
- 276
- 277 if (null != m_charset)
- 278 {
- 279 if (null != charset)
- 280 {
- 281 if (!charset.equals(m_charset))
- 282 return;
- 283 }
- 284 else
- 285 return;
- 286 }
- 287
- 288 if (null != m_title)
- 289 {
- 290 if (null != title)
- 291 {
- 292 if (!title.equals(m_title))
- 293 return;
- 294 }
- 295 else
- 296 return;
- 297 }
- 298
- 299 m_stylesheets.addElement(source);
- 300 }
- 301 }
- 302 }
- 303
- 304
- 305 /**
- 306 * The spec notes that "The xml-stylesheet processing instruction is allowed only in the prolog of an XML document.",
- 307 * so, at least for right now, I'm going to go ahead an throw a TransformerException
- 308 * in order to stop the parse.
- 309 *
- 310 * @param namespaceURI The Namespace URI, or an empty string.
- 311 * @param localName The local name (without prefix), or empty string if not namespace processing.
- 312 * @param qName The qualified name (with prefix).
- 313 * @param atts The specified or defaulted attributes.
- 314 *
- 315 * @throws StopParseException since there can be no valid xml-stylesheet processing
- 316 * instructions past the first element.
- 317 */
- 318 public void startElement(
- 319 String namespaceURI, String localName, String qName, Attributes atts)
- 320 throws org.xml.sax.SAXException
- 321 {
- 322 throw new StopParseException();
- 323 }
- 324
- 325 /**
- 326 * Added additional getter and setter methods for the Base Id
- 327 * to fix bugzilla bug 24187
- 328 *
- 329 */
- 330 public void setBaseId(String baseId) {
- 331 m_baseID = baseId;
- 332
- 333 }
- 334 public String getBaseId() {
- 335 return m_baseID ;
- 336 }
- 337
- 338}
