Source for javax.xml.parsers.SAXParser

   1: /* SAXParser.java --
   2:    Copyright (C) 2004, 2005  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package javax.xml.parsers;
  39: 
  40: import java.io.File;
  41: import java.io.FileInputStream;
  42: import java.io.InputStream;
  43: import java.io.IOException;
  44: import javax.xml.validation.Schema;
  45: import org.xml.sax.HandlerBase;
  46: import org.xml.sax.InputSource;
  47: import org.xml.sax.Parser;
  48: import org.xml.sax.SAXException;
  49: import org.xml.sax.SAXNotRecognizedException;
  50: import org.xml.sax.SAXNotSupportedException;
  51: import org.xml.sax.XMLReader;
  52: import org.xml.sax.helpers.DefaultHandler;
  53: 
  54: /**
  55:  * Convenience class for using or accessing a SAX version 1 or 2 parser.
  56:  * Instances of this class are <em>not</em> guaranteed to be thread safe.
  57:  *
  58:  * @author (a href='mailto:dog@gnu.org'>Chris Burdess</a)
  59:  */
  60: public abstract class SAXParser
  61: {
  62: 
  63:   protected SAXParser()
  64:   {
  65:   }
  66: 
  67:   /**
  68:    * Parse the specifed input stream, reporting SAX1 events to the given
  69:    * handler.
  70:    * Prefer the SAX2 version of this method, since the HandlerBase class is
  71:    * now deprecated.
  72:    * Also prefer the version of this method that specifies a system ID, in
  73:    * order to resolve external references correctly.
  74:    * @param is an XML input stream
  75:    * @param hb the SAX1 handler
  76:    * @exception IllegalArgumentException if the input stream is null
  77:    * @see #parse(java.io.InputStream,org.xml.sax.helpers.DefaultHandler)
  78:    */
  79:   public void parse(InputStream is, HandlerBase hb)
  80:     throws SAXException, IOException
  81:   {
  82:     if (is == null)
  83:       {
  84:         throw new IllegalArgumentException("input stream is null");
  85:       }
  86:     parse(new InputSource(is), hb);
  87:   }
  88: 
  89:   /**
  90:    * Parse the specified input stream, reporting SAX1 events to the given
  91:    * handler.
  92:    * Prefer the SAX2 version of this method, since the HandlerBase class is
  93:    * now deprecated.
  94:    * @param is an XML input stream
  95:    * @param hb the SAX1 handler
  96:    * @param systemId the system ID of the XML document
  97:    * @exception IllegalArgumentException if the input stream is null
  98:    * @see #parse(java.io.InputStream,org.xml.sax.helpers.DefaultHandler,java.lang.String)
  99:    */
 100:   public void parse(InputStream is, HandlerBase hb, String systemId)
 101:      throws SAXException, IOException
 102:   {
 103:     if (is == null)
 104:       {
 105:         throw new IllegalArgumentException("input stream is null");
 106:       }
 107:     InputSource  source = new InputSource(is);
 108:     source.setSystemId(systemId);
 109:     parse(source, hb);
 110:   }
 111: 
 112:   /**
 113:    * Parse the specified input stream, reporting SAX2 events to the given
 114:    * handler.
 115:    * Prefer the version of this method that specifies a system ID, in
 116:    * order to resolve external references correctly.
 117:    * @param is an XML input stream
 118:    * @param dh the SAX2 handler
 119:    * @exception IllegalArgumentException if the input stream is null
 120:    */
 121:   public void parse(InputStream is, DefaultHandler dh)
 122:     throws SAXException, IOException
 123:   {
 124:     if (is == null)
 125:       {
 126:         throw new IllegalArgumentException("input stream is null");
 127:       }
 128:     parse(new InputSource(is), dh);
 129:   }
 130: 
 131:   /**
 132:    * Parse the specified input stream, reporting SAX2 events to the given
 133:    * handler.
 134:    * @param is an XML input stream
 135:    * @param dh the SAX2 handler
 136:    * @param systemId the system ID of the XML document
 137:    * @exception IllegalArgumentException if the input stream is null
 138:    */
 139:   public void parse (InputStream is, DefaultHandler dh, String systemId)
 140:      throws SAXException, IOException
 141:   {
 142:     if (is == null)
 143:       {
 144:         throw new IllegalArgumentException("input stream is null");
 145:       }
 146:     InputSource  source = new InputSource(is);
 147:     source.setSystemId(systemId);
 148:     parse(source, dh);
 149:   }
 150: 
 151:   /**
 152:    * Parse the content of the specified URI, reporting SAX1 events to the
 153:    * given handler.
 154:    * Prefer the SAX2 version of this method, since the HandlerBase class is
 155:    * now deprecated.
 156:    * @param uri an XML system ID
 157:    * @param hb the SAX1 handler
 158:    * @exception IllegalArgumentException if the URI is null
 159:    * @see #parse(java.lang.String,org.xml.sax.helpers.DefaultHandler)
 160:    */
 161:   public void parse(String uri, HandlerBase hb)
 162:     throws SAXException, IOException
 163:   {
 164:     if (uri == null)
 165:       {
 166:         throw new IllegalArgumentException("URI is null");
 167:       }
 168:     parse(new InputSource(uri), hb);
 169:   }
 170: 
 171:   /**
 172:    * Parse the content of the specified URI, reporting SAX2 events to the
 173:    * given handler.
 174:    * @param uri an XML system ID
 175:    * @param dh the SAX2 handler
 176:    * @exception IllegalArgumentException if the URI is null
 177:    */
 178:   public void parse(String uri, DefaultHandler dh)
 179:     throws SAXException, IOException
 180:   {
 181:     if (uri == null)
 182:       {
 183:         throw new IllegalArgumentException("URI is null");
 184:       }
 185:     parse(new InputSource(uri), dh);
 186:   }
 187: 
 188:   /**
 189:    * Parse the content of the specified file, reporting SAX1 events to the
 190:    * given handler.
 191:    * Prefer the SAX2 version of this method, since the HandlerBase class is
 192:    * now deprecated.
 193:    * @param f an XML file
 194:    * @param hb the SAX1 handler
 195:    * @exception IllegalArgumentException if the file is null
 196:    * @see #parse(java.io.File,org.xml.sax.helpers.DefaultHandler)
 197:    */
 198:   public void parse(File f, HandlerBase hb)
 199:     throws SAXException, IOException
 200:   {
 201:     if (f == null)
 202:       {
 203:         throw new IllegalArgumentException("file is null");
 204:       }
 205:     InputSource source = new InputSource(new FileInputStream(f));
 206:     source.setSystemId(f.toURL().toString());
 207:     parse(source, hb);
 208:   }
 209: 
 210:   /**
 211:    * Parse the content of the specified file, reporting SAX2 events to the
 212:    * given handler.
 213:    * @param f an XML file
 214:    * @param dh the SAX2 handler
 215:    * @exception IllegalArgumentException if the file is null
 216:    */
 217:   public void parse(File f, DefaultHandler dh)
 218:     throws SAXException, IOException
 219:   {
 220:     if (f == null)
 221:       {
 222:         throw new IllegalArgumentException("file is null");
 223:       }
 224:     InputSource source = new InputSource(new FileInputStream(f));
 225:     source.setSystemId(f.toURL().toString());
 226:     parse(source, dh);
 227:   }
 228: 
 229:   /**
 230:    * Parse the specified input source, reporting SAX1 events to the
 231:    * given handler.
 232:    * Prefer the SAX2 version of this method, since the HandlerBase class is
 233:    * now deprecated.
 234:    * @param is the SAX input source
 235:    * @param hb the SAX1 handler
 236:    * @exception IllegalArgumentException if the input source is null
 237:    * @see #parse(org.xml.sax.InputSource,org.xml.sax.helpers.DefaultHandler)
 238:    */
 239:   public void parse(InputSource is, HandlerBase hb)
 240:     throws SAXException, IOException
 241:   {
 242:     if (is == null)
 243:       {
 244:         throw new IllegalArgumentException("input source is null");
 245:       }
 246:     Parser parser = getParser();
 247:     parser.setDocumentHandler(hb);
 248:     parser.setDTDHandler(hb);
 249:     parser.setEntityResolver(hb);
 250:     parser.setErrorHandler(hb);
 251:     parser.parse(is);
 252:   }
 253: 
 254:   /**
 255:    * Parse the specified input source, reporting SAX2 events to the
 256:    * given handler.
 257:    * @param is an XML file
 258:    * @param dh the SAX2 handler
 259:    * @exception IllegalArgumentException if the input source is null
 260:    */
 261:   public void parse(InputSource is, DefaultHandler dh)
 262:     throws SAXException, IOException
 263:   {
 264:     if (is == null)
 265:       {
 266:         throw new IllegalArgumentException("input source is null");
 267:       }
 268:     XMLReader reader = getXMLReader();
 269:     reader.setContentHandler(dh);
 270:     reader.setDTDHandler(dh);
 271:     reader.setEntityResolver(dh);
 272:     reader.setErrorHandler(dh);
 273:     reader.parse(is);
 274:   }
 275: 
 276:   /**
 277:    * Returns the underlying SAX1 parser.
 278:    */
 279:   public abstract Parser getParser() throws SAXException;
 280: 
 281:   /**
 282:    * Returns the underlying SAX2 parser.
 283:    * @since 1.1
 284:    */
 285:   public abstract XMLReader getXMLReader() throws SAXException;
 286: 
 287:   /**
 288:    * Indicates whether this parser is XML Namespace aware.
 289:    */
 290:   public abstract boolean isNamespaceAware();
 291: 
 292:   /**
 293:    * Indicates whether this parser will validate its input.
 294:    */
 295:   public abstract boolean isValidating();
 296: 
 297:   /**
 298:    * Sets the specified SAX2 parser property.
 299:    * @param name the name of the property
 300:    * @param value the value of the property
 301:    */
 302:   public abstract void setProperty(String name, Object value)
 303:     throws SAXNotRecognizedException, SAXNotSupportedException;
 304: 
 305:   /**
 306:    * Returns the value of the specified SAX2 parser property.
 307:    * @param name the name of the property
 308:    */
 309:   public abstract Object getProperty(String name)
 310:     throws SAXNotRecognizedException, SAXNotSupportedException;
 311: 
 312:   // -- JAXP 1.3 methods --
 313: 
 314:   /**
 315:    * Resets this parser to its original configuration.
 316:    * @since 1.3
 317:    */
 318:   public void reset()
 319:   {
 320:   }
 321: 
 322:   /**
 323:    * Returns the schema in use by this parser.
 324:    * @since 1.3
 325:    */
 326:   public Schema getSchema()
 327:   {
 328:     return null;
 329:   }
 330: 
 331:   /**
 332:    * Indicates whether this parser is XInclude-aware.
 333:    * @since 1.3
 334:    */
 335:   public boolean isXIncludeAware()
 336:   {
 337:     return false;
 338:   }
 339: 
 340: }