libjava/classpath/gnu/xml/stream/XMLEventAllocatorImpl.java

   1 /* XMLEventAllocatorImpl.java --
   2    Copyright (C) 2005,2006  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 gnu.xml.stream;
  39
  40 import java.util.HashMap;
  41 import java.util.LinkedList;
  42 import java.util.List;
  43 import java.util.Map;
  44 import javax.xml.namespace.QName;
  45 import javax.xml.stream.Location;
  46 import javax.xml.stream.XMLStreamConstants;
  47 import javax.xml.stream.XMLStreamException;
  48 import javax.xml.stream.XMLStreamReader;
  49 import javax.xml.stream.events.EntityDeclaration;
  50 import javax.xml.stream.events.XMLEvent;
  51 import javax.xml.stream.util.XMLEventAllocator;
  52 import javax.xml.stream.util.XMLEventConsumer;
  53
  54 /**
  55  * Allocator for creating XML events based on a reader state.
  56  *
  57  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  58  */
  59 public class XMLEventAllocatorImpl
  60   implements XMLEventAllocator
  61 {
  62
  63   protected Map entityDeclarations;
  64
  65   protected XMLEventAllocatorImpl()
  66   {
  67     entityDeclarations = new HashMap();
  68   }
  69
  70   public XMLEvent allocate(XMLStreamReader reader)
  71     throws XMLStreamException
  72   {
  73     String text;
  74     boolean whitespace;
  75     boolean ignorableWhitespace;
  76     int len;
  77     List namespaces;
  78     int eventType = reader.getEventType();
  79     Location location = reader.getLocation();
  80     switch (eventType)
  81       {
  82       case XMLStreamConstants.CDATA:
  83         text = reader.getText();
  84         whitespace = isWhitespace(text);
  85         // TODO ignorableWhitespace
  86         ignorableWhitespace = whitespace && false;
  87         return new CharactersImpl(location, text,
  88                                   whitespace, true, ignorableWhitespace);
  89       case XMLStreamConstants.CHARACTERS:
  90         text = reader.getText();
  91         whitespace = false;
  92         // TODO ignorableWhitespace
  93         ignorableWhitespace = whitespace && false;
  94         return new CharactersImpl(location, text,
  95                                   whitespace, false, ignorableWhitespace);
  96       case XMLStreamConstants.COMMENT:
  97         text = reader.getText();
  98         return new CommentImpl(location, text);
  99       case XMLStreamConstants.DTD:
 100         text = reader.getText();
 101         List notations = new LinkedList();
 102         List entities = new LinkedList();
 103         // TODO readDTDBody(notations, entities);
 104         return new DTDImpl(location, text, null, notations, entities);
 105       case XMLStreamConstants.END_DOCUMENT:
 106         return new EndDocumentImpl(location);
 107       case XMLStreamConstants.END_ELEMENT:
 108         len = reader.getNamespaceCount();
 109         namespaces = new LinkedList();
 110         for (int i = 0; i < len; i++)
 111           namespaces.add(new NamespaceImpl(location,
 112                                            reader.getNamespacePrefix(i),
 113                                            reader.getNamespaceURI(i)));
 114         return new EndElementImpl(location,
 115                                   reader.getName(),
 116                                   namespaces);
 117       case XMLStreamConstants.ENTITY_REFERENCE:
 118         String name = reader.getLocalName();
 119         EntityDeclaration decl =
 120           (EntityDeclaration) entityDeclarations.get(name);
 121         return new EntityReferenceImpl(location, decl, name);
 122       case XMLStreamConstants.PROCESSING_INSTRUCTION:
 123         return new ProcessingInstructionImpl(location,
 124                                              reader.getPITarget(),
 125                                              reader.getPIData());
 126       case XMLStreamConstants.SPACE:
 127         text = reader.getText();
 128         whitespace = true;
 129         // TODO ignorableWhitespace
 130         ignorableWhitespace = whitespace && false;
 131         return new CharactersImpl(location, text,
 132                                   whitespace, false, ignorableWhitespace);
 133       case XMLStreamConstants.START_DOCUMENT:
 134         String systemId = location.getSystemId();
 135         String encoding = reader.getCharacterEncodingScheme();
 136         boolean encodingDeclared = encoding != null;
 137         if (encoding == null)
 138           {
 139             encoding = reader.getEncoding();
 140             if (encoding == null)
 141               encoding = "UTF-8";
 142           }
 143         String xmlVersion = reader.getVersion();
 144         if (xmlVersion == null)
 145           xmlVersion = "1.0";
 146         boolean xmlStandalone = reader.isStandalone();
 147         boolean standaloneDeclared = reader.standaloneSet();
 148         return new StartDocumentImpl(location,
 149                                      systemId,
 150                                      encoding,
 151                                      xmlVersion,
 152                                      xmlStandalone,
 153                                      standaloneDeclared,
 154                                      encodingDeclared);
 155       case XMLStreamConstants.START_ELEMENT:
 156         len = reader.getNamespaceCount();
 157         namespaces = new LinkedList();
 158         for (int i = 0; i < len; i++)
 159           namespaces.add(new NamespaceImpl(location,
 160                                            reader.getNamespacePrefix(i),
 161                                            reader.getNamespaceURI(i)));
 162         len = reader.getAttributeCount();
 163         List attributes = new LinkedList();
 164         for (int i = 0; i < len; i++)
 165           attributes.add(new AttributeImpl(location,
 166                                            reader.getAttributeName(i),
 167                                            reader.getAttributeValue(i),
 168                                            reader.getAttributeType(i),
 169                                            reader.isAttributeSpecified(i)));
 170         return new StartElementImpl(location,
 171                                     reader.getName(),
 172                                     attributes, namespaces,
 173                                     reader.getNamespaceContext());
 174       default:
 175         throw new XMLStreamException("Unknown event type: " + eventType);
 176       }
 177   }
 178
 179   public void allocate(XMLStreamReader reader, XMLEventConsumer consumer)
 180     throws XMLStreamException
 181   {
 182     consumer.add(allocate(reader));
 183   }
 184
 185   public XMLEventAllocator newInstance()
 186   {
 187     return new XMLEventAllocatorImpl();
 188   }
 189
 190   protected boolean isWhitespace(String text)
 191   {
 192     int len = text.length();
 193     for (int i = 0; i < len; i++)
 194       {
 195         char c = text.charAt(i);
 196         if (c != 0x20 && c != 0x09 && c != 0x0a && c != 0x0d)
 197           return false;
 198       }
 199     return true;
 200   }
 201
 202 }
 203