Source for gnu.xml.stream.XMLEventAllocatorImpl

   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:                                            QName.valueOf(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: }