embedded-5_0-branch/libjava/classpath/gnu/xml/validation/xmlschema/XMLSchemaSchemaFactory.java

   1 /* XMLSchemaSchemaFactory.java --
   2    Copyright (C) 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.validation.xmlschema;
  39
  40 import java.io.IOException;
  41 import java.net.URL;
  42 import javax.xml.XMLConstants;
  43 import javax.xml.parsers.DocumentBuilder;
  44 import javax.xml.parsers.DocumentBuilderFactory;
  45 import javax.xml.parsers.ParserConfigurationException;
  46 import javax.xml.transform.Source;
  47 import javax.xml.transform.dom.DOMSource;
  48 import javax.xml.transform.stream.StreamSource;
  49 import javax.xml.validation.Schema;
  50 import javax.xml.validation.SchemaFactory;
  51 import org.relaxng.datatype.DatatypeException;
  52 import org.w3c.dom.Document;
  53 import org.w3c.dom.Node;
  54 import org.w3c.dom.ls.LSResourceResolver;
  55 import org.xml.sax.ErrorHandler;
  56 import org.xml.sax.InputSource;
  57 import org.xml.sax.SAXException;
  58
  59 /**
  60  * Schema factory for W3C XML Schema schemata.
  61  *
  62  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  63  */
  64 public class XMLSchemaSchemaFactory
  65   extends SchemaFactory
  66 {
  67
  68   LSResourceResolver resourceResolver;
  69   ErrorHandler errorHandler;
  70
  71   public LSResourceResolver getResourceResolver()
  72   {
  73     return resourceResolver;
  74   }
  75
  76   public void setResourceResolver(LSResourceResolver resourceResolver)
  77   {
  78     this.resourceResolver = resourceResolver;
  79   }
  80
  81   public ErrorHandler getErrorHandler()
  82   {
  83     return this.errorHandler;
  84   }
  85
  86   public void setErrorHandler(ErrorHandler errorHandler)
  87   {
  88     this.errorHandler = errorHandler;
  89   }
  90
  91
  92   public boolean isSchemaLanguageSupported(String schemaLanguage)
  93   {
  94     return XMLConstants.W3C_XML_SCHEMA_NS_URI.equals(schemaLanguage);
  95   }
  96
  97   public Schema newSchema()
  98     throws SAXException
  99   {
 100     // TODO
 101     throw new UnsupportedOperationException();
 102   }
 103
 104   public Schema newSchema(Source[] schemata)
 105     throws SAXException
 106   {
 107     if (schemata == null || schemata.length != 1)
 108       throw new IllegalArgumentException("must specify one source");
 109     // TODO multiple sources
 110     try
 111       {
 112         Document doc = getDocument(schemata[0]);
 113         XMLSchemaBuilder builder = new XMLSchemaBuilder();
 114         builder.parseSchema(doc);
 115         return builder.schema;
 116       }
 117     catch (IOException e)
 118       {
 119         SAXException e2 = new SAXException(e.getMessage());
 120         e2.initCause(e);
 121         throw e2;
 122       }
 123     catch (DatatypeException e)
 124       {
 125         SAXException e2 = new SAXException(e.getMessage());
 126         e2.initCause(e);
 127         throw e2;
 128       }
 129   }
 130
 131   private static Document getDocument(Source source)
 132     throws SAXException, IOException
 133   {
 134     if (source instanceof DOMSource)
 135       {
 136         Node node = ((DOMSource) source).getNode();
 137         if (node != null && node instanceof Document)
 138           return (Document) node;
 139       }
 140     String url = source.getSystemId();
 141     try
 142       {
 143         InputSource input = new InputSource(url);
 144         if (source instanceof StreamSource)
 145           {
 146             StreamSource streamSource = (StreamSource) source;
 147             input.setByteStream(streamSource.getInputStream());
 148             input.setCharacterStream(streamSource.getReader());
 149           }
 150         if (input.getByteStream() == null &&
 151             input.getCharacterStream() == null &&
 152             url != null)
 153           input.setByteStream(new URL(url).openStream());
 154         DocumentBuilderFactory f = DocumentBuilderFactory.newInstance();
 155         f.setNamespaceAware(true);
 156         f.setCoalescing(true);
 157         f.setExpandEntityReferences(true);
 158         f.setIgnoringComments(true);
 159         f.setIgnoringElementContentWhitespace(true);
 160         DocumentBuilder b = f.newDocumentBuilder();
 161         return b.parse(input);
 162       }
 163     catch (ParserConfigurationException e)
 164       {
 165         SAXException e2 = new SAXException(e.getMessage());
 166         e2.initCause(e);
 167         throw e2;
 168       }
 169   }
 170
 171 }