package edu.stanford.db.rdf.syntax.generic;import org.w3c.rdf.model.*;import org.w3c.rdf.implementation.model.StatementImpl;import org.w3c.rdf.syntax.*;import org.xml.sax.*;import org.xml.sax.helpers.*;import edu.stanford.db.xml.util.*;import java.util.*;import java.io.*;import java.net.*;public class GenericXML2RDF extends GenericParser implements RDFParser {  static final public String REVISION = "Generic RDF/XML parser v0.3 2000-10-31";  protected NodeFactory nodeFactory;  protected RDFConsumer consumer;  public GenericXML2RDF () {    super();  }  public GenericXML2RDF (boolean warn) {        super(warn);  }  protected Resource createResource(String str) throws ModelException {    // check whether we can extract namespace    Enumeration en = getNamespaces();    //    System.out.println("NS CHECK for " + str);    while(en.hasMoreElements()) {      String ns = (String)en.nextElement();      //      System.out.println("NS CHECK " + str + " against " + ns);      if(str.startsWith(ns))	return createResource(ns, str.substring(ns.length()));    }    //    System.out.println("OPAQUE RESOURCE: " + str);    return nodeFactory.createResource(create(str));  }  protected Resource createResource(String namespace, String name) throws ModelException {    Resource r = nodeFactory.createResource(create(namespace), create(name));    //    System.out.println("RESOURCE " + r.getNamespace() + " --- " + r.getLocalName());    return r;  }  protected Resource createResource(QName name) throws ModelException {    return createResource(name.getNamespace(), name.getLocalName());  }  protected Literal createLiteral(String str, boolean isXML)  throws ModelException {    return nodeFactory.createLiteral(create(str));  }                                   protected Literal createLiteral(String str)  throws ModelException {    return nodeFactory.createLiteral(create(str));  }  protected Statement createStatement(Resource subject, Resource predicate, RDFNode object) throws ModelException {    Statement st;    consumer.addStatement(st = nodeFactory.createStatement(subject, predicate, object));    return st;  }  public void parse(InputSource source, RDFConsumer consumer) throws SAXException {    this.source = source;    this.consumer = consumer;    try {      this.nodeFactory = consumer.getNodeFactory();      consumer.startModel();      XMLReader p = createXMLReader();      //      Parser p = ParserFactory.makeParser();      // Register the handlers      p.setEntityResolver(this);      //      p.setDTDHandler (this);      p.setContentHandler(this);      p.setErrorHandler (errorHandler != null ? errorHandler : this);      p.parse ( source );      consumer.endModel();    } catch (Exception any) {      if(any instanceof SAXException)      	throw (SAXException)any;      else      	throw new SAXException("Fatal error", any);    }  }  protected static void _main(String url, RDFParser parser) throws IOException, MalformedURLException {    InputSource source = getInputSource(url);    RDFConsumer consumer = new DumpConsumer();    ErrorStore handler = new ErrorStore();    parser.setErrorHandler(handler);    try {      parser.parse(source, consumer);    } catch (SAXException se) {      System.err.println("Error during parsing: " + se.getMessage());      Exception ex = (se.getException() != null) ? se.getException() : se;      ex.printStackTrace(System.err);    }        String sErrors = handler.errors ();    if (sErrors != null && sErrors.length() > 0)      System.err.println ("Errors during parsing:\n"+sErrors);  }  public static void main (String args[]) throws Exception {    if(args.length != 1) {      System.err.println("Usage: java [-Dorg.xml.sax.parser=<classname>] GenericXML2RDF " +			 //			 "[-fetch_schemas | -f] [-stream | -s] [-robust | -r] [ URI | filename ]");			 "[ URI | filename ]");      System.err.println ("This is revision " + REVISION);      System.exit(1);    }    GenericXML2RDF gp;    _main(args[0], gp = new GenericXML2RDF());    Enumeration en = gp.getNamespaces();    while(en.hasMoreElements())      System.out.println("Namespaces used: " + en.nextElement());  }}