saxdriver.java

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    if (state == value)
      {
        return;
      }
    if (parser != null)
      {
        throw new SAXNotSupportedException("not while parsing");
      }

    if ((FEATURE + "namespace-prefixes").equals(featureId))
      {
        // in this implementation, this only affects xmlns reporting
        xmlNames = value;
        // forcibly prevent illegal parser state
        if (!xmlNames)
          {
            namespaces = true;
          }
        return;
      }

    if ((FEATURE + "namespaces").equals(featureId))
      {
        namespaces = value;
        // forcibly prevent illegal parser state
        if (!namespaces)
          {
            xmlNames = true;
          }
        return;
      }

    if ((FEATURE + "external-general-entities").equals(featureId))
      {
        extGE = value;
        return;
      }
    if ((FEATURE + "external-parameter-entities").equals(featureId))
      {
        extPE = value;
        return;
      }
    if ((FEATURE + "resolve-dtd-uris").equals(featureId))
      {
        resolveAll = value;
        return;
      }

    if ((FEATURE + "use-entity-resolver2").equals(featureId))
      {
        useResolver2 = value;
        return;
      }

    throw new SAXNotRecognizedException(featureId);
  }

  /**
   * <b>SAX2</b>:  Assigns the specified property.  Like SAX1 handlers,
   * these may be changed at any time.
   */
  public void setProperty(String propertyId, Object value)
    throws SAXNotRecognizedException, SAXNotSupportedException
  {
    // see if the property is recognized
    getProperty(propertyId);
    
    // Properties with a defined value, we just change it if we can.
    
    if ((PROPERTY + "declaration-handler").equals(propertyId))
      {
        if (value == null)
          {
            declHandler = base;
          }
        else if (!(value instanceof DeclHandler))
          {
            throw new SAXNotSupportedException(propertyId);
          }
        else
          {
            declHandler = (DeclHandler) value;
          }
        return ;
      }
    
    if ((PROPERTY + "lexical-handler").equals(propertyId))
      {
        if (value == null)
          {
            lexicalHandler = base;
          }
        else if (!(value instanceof LexicalHandler))
          {
            throw new SAXNotSupportedException(propertyId);
          }
        else
          {
            lexicalHandler = (LexicalHandler) value;
          }
        return;
      }
    
    throw new SAXNotSupportedException(propertyId);
  }

  //
  // This is where the driver receives XmlParser callbacks and translates
  // them into SAX callbacks.  Some more callbacks have been added for
  // SAX2 support.
  //

  void startDocument()
    throws SAXException
  {
    contentHandler.setDocumentLocator(this);
    contentHandler.startDocument();
    attributesList.clear();
  }

  void skippedEntity(String name)
    throws SAXException
  {
    contentHandler.skippedEntity(name);
  }

  InputSource getExternalSubset(String name, String baseURI)
    throws SAXException, IOException
  {
    if (resolver2 == null || !useResolver2 || !extPE)
      {
        return null;
      }
    return resolver2.getExternalSubset(name, baseURI);
  }

  InputSource resolveEntity(boolean isPE, String name,
                            InputSource in, String baseURI)
    throws SAXException, IOException
  {
    InputSource  source;
    
    // external entities might be skipped
    if (isPE && !extPE)
      {
        return null;
      }
    if (!isPE && !extGE)
      {
        return null;
      }

    // ... or not
    lexicalHandler.startEntity(name);
    if (resolver2 != null && useResolver2)
      {
        source = resolver2.resolveEntity(name, in.getPublicId(),
                                         baseURI, in.getSystemId());
        if (source == null)
          {
            in.setSystemId(absolutize(baseURI,
                                      in.getSystemId(), false));
            source = in;
          }
      }
    else
      {
        in.setSystemId(absolutize(baseURI,
                                  in.getSystemId(),
                                  entityResolver != base));
        source = entityResolver.resolveEntity(in.getPublicId(),
                                              in.getSystemId());
        if (source == null)
          {
            source = in;
          }
      }
    startExternalEntity(name, source.getSystemId(), true);
    return source;
  }

  // absolutize a system ID relative to the specified base URI
  // (temporarily) package-visible for external entity decls
  String absolutize(String baseURI, String systemId, boolean nice)
    throws MalformedURLException, SAXException
  {
    // FIXME normalize system IDs -- when?
    // - Convert to UTF-8
    // - Map reserved and non-ASCII characters to %HH
    
    try
      {
        if (baseURI == null)
          {
            if (XmlParser.uriWarnings)
              {
                warn ("No base URI; hope this SYSTEM id is absolute: "
                      + systemId);
              }
            return new URL(systemId).toString();
          }
        else
          {
            return new URL(new URL(baseURI), systemId).toString();
          }
      }
    catch (MalformedURLException e)
      {
        // Let unknown URI schemes pass through unless we need
        // the JVM to map them to i/o streams for us...
        if (!nice)
          {
            throw e;
          }
        
        // sometimes sysids for notations or unparsed entities
        // aren't really URIs...
        warn("Can't absolutize SYSTEM id: " + e.getMessage());
        return systemId;
      }
  }

  void startExternalEntity(String name, String systemId, boolean stackOnly)
    throws SAXException
  {
    // The following warning was deleted because the application has the
    // option of not setting systemId. Sun's JAXP or Xerces seems to
    // ignore this case.
    /*
       if (systemId == null)
       warn ("URI was not reported to parser for entity " + name);
     */
    if (!stackOnly)  // spliced [dtd] needs startEntity
      {
        lexicalHandler.startEntity(name);
      }
    entityStack.push(systemId);
  }

  void endExternalEntity(String name)
    throws SAXException
  {
    if (!"[document]".equals(name))
      {
        lexicalHandler.endEntity(name);
      }
    entityStack.pop();
  }

  void startInternalEntity(String name)
    throws SAXException
  {
    lexicalHandler.startEntity(name);
  }

  void endInternalEntity(String name)
    throws SAXException
  {
    lexicalHandler.endEntity(name);
  }

  void doctypeDecl(String name, String publicId, String systemId)
    throws SAXException
  {
    lexicalHandler.startDTD(name, publicId, systemId);
  
    // ... the "name" is a declaration and should be given
    // to the DeclHandler (but sax2 doesn't).
    
    // the IDs for the external subset are lexical details,
    // as are the contents of the internal subset; but sax2
    // doesn't provide the internal subset "pre-parse"
  }
  
  void notationDecl(String name, String publicId, String systemId,
                    String baseUri)
    throws SAXException
  {
    try
      {
        dtdHandler.notationDecl(name, publicId,
                                (resolveAll && systemId != null)
                                ? absolutize(baseUri, systemId, true)
                                : systemId);
      }
    catch (IOException e)
      {
        // "can't happen"
        throw new SAXParseException(e.getMessage(), this, e);
      }
  }

  void unparsedEntityDecl(String name, String publicId, String systemId,
                          String baseUri, String notation)
    throws SAXException
  {
    try
      {
        dtdHandler.unparsedEntityDecl(name, publicId,
                                      resolveAll
                                      ? absolutize(baseUri, systemId, true)
                                      : systemId,
                                      notation);
      }
    catch (IOException e)
      {
        // "can't happen"
        throw new SAXParseException(e.getMessage(), this, e);
      }
  }

  void endDoctype()
    throws SAXException
  {
    lexicalHandler.endDTD();
  }

  private void declarePrefix(String prefix, String uri)
    throws SAXException
  {
    int index = uri.indexOf(':');

    // many versions of nwalsh docbook stylesheets 
    // have bogus URLs; so this can't be an error...
    if (index < 1 && uri.length() != 0)
      {
        warn("relative URI for namespace: " + uri);
      }

    // FIXME:  char [0] must be ascii alpha; chars [1..index]
    // must be ascii alphanumeric or in "+-." [RFC 2396]
    
    //Namespace Constraints
    //name for xml prefix must be http://www.w3.org/XML/1998/namespace
    boolean prefixEquality = prefix.equals("xml");
    boolean uriEquality = uri.equals("http://www.w3.org/XML/1998/namespace");
    if ((prefixEquality || uriEquality) && !(prefixEquality && uriEquality))
      {
        fatal("xml is by definition bound to the namespace name " +
              "http://www.w3.org/XML/1998/namespace");
      }
  
    //xmlns prefix declaration is illegal but xml prefix declaration is llegal...
    if (prefixEquality && uriEquality)
      {
        return;
      }
  
    //name for xmlns prefix must be http://www.w3.org/2000/xmlns/
    prefixEquality = prefix.equals("xmlns");
    uriEquality = uri.equals("http://www.w3.org/2000/xmlns/");
    if ((prefixEquality || uriEquality) && !(prefixEquality && uriEquality))
      {
        fatal("http://www.w3.org/2000/xmlns/ is by definition bound" +
              " to prefix xmlns");
      }
  
    //even if the uri is http://www.w3.org/2000/xmlns/
    // it is illegal to declare it
    if (prefixEquality && uriEquality)
      {
        fatal ("declaring the xmlns prefix is illegal");
      }
  
    uri = uri.intern();
    prefixStack.declarePrefix(prefix, uri);
    contentHandler.startPrefixMapping(prefix, uri);
  }

  void attribute(String qname, String value, boolean isSpecified)
    throws SAXException
  {
    if (!attributes)
      {
        attributes = true;
        if (namespaces)
          {
            prefixStack.pushContext();
          }
      }
    
    // process namespace decls immediately;
    // then maybe forget this as an attribute
    if (namespaces)
      {
        int index;
        
        // default NS declaration?
        if (stringInterning)
          {
            if ("xmlns" == qname)
              {
                declarePrefix("", value);
                if (!xmlNames)
                  {
                    return;
                  }
              }
            // NS prefix declaration?
            else if ((index = qname.indexOf(':')) == 5
                     && qname.startsWith("xmlns"))
              {
                String prefix = qname.substring(6);
              
                if (prefix.equals(""))
                  {
                    fatal("missing prefix " +
                          "in namespace declaration attribute");  
                  }
                if (value.length() == 0)
                  {
                    verror("missing URI in namespace declaration attribute: "
                           + qname);
                  }
                else
                  {
                    declarePrefix(prefix, value);
                  }
                if (!xmlNames)
                  {
                    return;
                  }
              }
          }
        else
          {
            if ("xmlns".equals(qname))
              {
                declarePrefix("", value);
                if (!xmlNames)
                  {
                    return;
                  }
              }
            // NS prefix declaration?
            else if ((index = qname.indexOf(':')) == 5
                     && qname.startsWith("xmlns"))
              {
                String prefix = qname.substring(6);
                
                if (value.length() == 0)
                  {
                    verror("missing URI in namespace decl attribute: "
                           + qname);
                  }
                else
                  {
                    declarePrefix(prefix, value);
                  }
                if (!xmlNames)
                  {
                    return;
                  }
              }
          }
      }
    // remember this attribute ...
    attributeCount++;
    
    // attribute type comes from querying parser's DTD records
    attributesList.add(new Attribute(qname, value, isSpecified));
    
  }
  
  void startElement(String elname)
    throws SAXException
  {
    ContentHandler handler = contentHandler;

    //
    // NOTE:  this implementation of namespace support adds something
    // like six percent to parsing CPU time, in a large (~50 MB)
    // document that doesn't use namespaces at all.  (Measured by PC
    // sampling, with a bug where endElement processing was omitted.)
    // [Measurement referred to older implementation, older JVM ...]
    //
    // It ought to become notably faster in such cases.  Most
    // costs are the prefix stack calling Hashtable.get() (2%),
    // String.hashCode() (1.5%) and about 1.3% each for pushing
    // the context, and two chunks of name processing.
    //
    
    if (!attributes)
      {
        if (namespaces)
          {
            prefixStack.pushContext();
          }
      }
    else if (namespaces)
      {
      
        // now we can patch up namespace refs; we saw all the
        // declarations, so now we'll do the Right Thing
        Iterator itt = attributesList.iterator();
        while (itt.hasNext())
          {
            Attribute attribute = (Attribute) itt.next();
            String qname = attribute.name;
            int index;
            
            // default NS declaration?
            if (stringInterning)
              {
                if ("xmlns" == qname)
                  {
                    continue;
                  }
              }
            else
              {
                if ("xmlns".equals(qname))
                  {
                    continue;
                  }
              }
            //Illegal in the new Namespaces Draft
            //should it be only in 1.1 docs??
            if (qname.equals (":"))
              {
                fatal("namespace names consisting of a single colon " +
                      "character are invalid");
              }
            index = qname.indexOf(':');
            
            // NS prefix declaration?
            if (index == 5 && qname.startsWith("xmlns"))
              {
                continue;
              }
            
            // it's not a NS decl; patch namespace info items
            if (prefixStack.processName(qname, nsTemp, true) == null)
              {
                fatal("undeclared attribute prefix in: " + qname);
              }
            else