Source for gnu.xml.dom.DomDocumentBuilderFactory

   1: /* DomDocumentBuilderFactory.java -- 
   2:    Copyright (C) 2004 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.dom;
  39: 
  40: import javax.xml.XMLConstants;
  41: import javax.xml.parsers.DocumentBuilder;
  42: import javax.xml.parsers.DocumentBuilderFactory;
  43: import javax.xml.parsers.FactoryConfigurationError;
  44: import javax.xml.parsers.ParserConfigurationException;
  45: import org.w3c.dom.DOMConfiguration;
  46: import org.w3c.dom.DOMImplementation;
  47: import org.w3c.dom.bootstrap.DOMImplementationRegistry;
  48: import org.w3c.dom.ls.DOMImplementationLS;
  49: import org.w3c.dom.ls.LSParser;
  50: 
  51: /**
  52:  * Document builder factory that uses a DOM Level 3 Load & Save
  53:  * implementation.
  54:  *
  55:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  56:  */
  57: public class DomDocumentBuilderFactory
  58:   extends DocumentBuilderFactory
  59: {
  60: 
  61:   final DOMImplementation impl;
  62:   final DOMImplementationLS ls;
  63:   private boolean secureProcessing;
  64: 
  65:   public DomDocumentBuilderFactory()
  66:   {
  67:     try
  68:       {
  69:         DOMImplementationRegistry reg =
  70:           DOMImplementationRegistry.newInstance();
  71:         impl = reg.getDOMImplementation("LS 3.0");
  72:         if (impl == null)
  73:           {
  74:             throw new FactoryConfigurationError("no LS implementations found");
  75:           }
  76:         ls = (DOMImplementationLS) impl;
  77:       }
  78:     catch (Exception e)
  79:       {
  80:         throw new FactoryConfigurationError(e);
  81:       }
  82:   }
  83: 
  84:   public DocumentBuilder newDocumentBuilder()
  85:     throws ParserConfigurationException
  86:   {
  87:     LSParser parser = ls.createLSParser(DOMImplementationLS.MODE_ASYNCHRONOUS,
  88:                                         "http://www.w3.org/TR/REC-xml");
  89:     DOMConfiguration config = parser.getDomConfig();
  90:     setParameter(config, "namespaces",
  91:                  isNamespaceAware() ? Boolean.TRUE : Boolean.FALSE);
  92:     setParameter(config, "element-content-whitespace",
  93:                  isIgnoringElementContentWhitespace() ? Boolean.FALSE :
  94:                  Boolean.TRUE);
  95:     setParameter(config, "comments",
  96:                  isIgnoringComments() ? Boolean.FALSE : Boolean.TRUE);
  97:     setParameter(config, "expand-entity-references",
  98:                  isExpandEntityReferences() ? Boolean.TRUE : Boolean.FALSE);
  99:     setParameter(config, "coalescing",
 100:                  isCoalescing() ? Boolean.TRUE : Boolean.FALSE);
 101:     setParameter(config, "validating",
 102:                  isValidating() ? Boolean.TRUE : Boolean.FALSE);
 103:     setParameter(config, "xinclude-aware",
 104:                  isXIncludeAware() ? Boolean.TRUE : Boolean.FALSE);
 105:     return new DomDocumentBuilder(impl, ls, parser);
 106:   }
 107: 
 108:   void setParameter(DOMConfiguration config, String name, Object value)
 109:     throws ParserConfigurationException
 110:   {
 111:     if (!config.canSetParameter(name, value))
 112:       {
 113:         throw new ParserConfigurationException(name);
 114:       }
 115:     config.setParameter(name, value);
 116:   }
 117: 
 118:   public Object getAttribute(String name)
 119:   {
 120:     // TODO
 121:     return null;
 122:   }
 123: 
 124:   public void setAttribute(String name, Object value)
 125:   {
 126:     // TODO
 127:   }
 128:   
 129:   public void setFeature(String name, boolean value)
 130:     throws ParserConfigurationException
 131:   {
 132:     if (name == null)
 133:       throw new NullPointerException();
 134:     if (XMLConstants.FEATURE_SECURE_PROCESSING.equals(name))
 135:       {
 136:         secureProcessing = true;
 137:         return;
 138:       }
 139:     throw new ParserConfigurationException(name);
 140:   }
 141: 
 142:   public boolean getFeature(String name)
 143:     throws ParserConfigurationException
 144:   {
 145:     if (XMLConstants.FEATURE_SECURE_PROCESSING.equals(name))
 146:       return secureProcessing;
 147:     throw new ParserConfigurationException(name);
 148:   }
 149:   
 150: }