transformerfactoryimpl.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,073 行 · 第 1/3 页

    }
    else
    {
      isource = SAXSource.sourceToInputSource(source);
      baseID = isource.getSystemId();
    }

    // What I try to do here is parse until the first startElement
    // is found, then throw a special exception in order to terminate 
    // the parse.
    StylesheetPIHandler handler = new StylesheetPIHandler(baseID, media,
                                    title, charset);
    
    // Use URIResolver. Patch from Dmitri Ilyin 
    if (m_uriResolver != null) 
    {
      handler.setURIResolver(m_uriResolver); 
    }

    try
    {
      if (null != node)
      {
        TreeWalker walker = new TreeWalker(handler, new org.apache.xpath.DOM2Helper(), baseID);

        walker.traverse(node);
      }
      else
      {

        // Use JAXP1.1 ( if possible )
        try
        {
          javax.xml.parsers.SAXParserFactory factory =
            javax.xml.parsers.SAXParserFactory.newInstance();

          factory.setNamespaceAware(true);

          javax.xml.parsers.SAXParser jaxpParser = factory.newSAXParser();

          reader = jaxpParser.getXMLReader();
        }
        catch (javax.xml.parsers.ParserConfigurationException ex)
        {
          throw new org.xml.sax.SAXException(ex);
        }
        catch (javax.xml.parsers.FactoryConfigurationError ex1)
        {
          throw new org.xml.sax.SAXException(ex1.toString());
        }
        catch (NoSuchMethodError ex2){}
        catch (AbstractMethodError ame){}

        if (null == reader)
        {
          reader = XMLReaderFactory.createXMLReader();
        }

        // Need to set options!
        reader.setContentHandler(handler);
        reader.parse(isource);
      }
    }
    catch (StopParseException spe)
    {

      // OK, good.
    }
    catch (org.xml.sax.SAXException se)
    {
      throw new TransformerConfigurationException(
        "getAssociatedStylesheets failed", se);
    }
    catch (IOException ioe)
    {
      throw new TransformerConfigurationException(
        "getAssociatedStylesheets failed", ioe);
    }

    return handler.getAssociatedStylesheet();
  }

  /**
   * Create a new Transformer object that performs a copy
   * of the source to the result.
   *
   * @param source An object that holds a URI, input stream, etc.
   *
   * @return A Transformer object that may be used to perform a transformation
   * in a single thread, never null.
   *
   * @throws TransformerConfigurationException May throw this during
   *            the parse when it is constructing the
   *            Templates object and fails.
   */
  public TemplatesHandler newTemplatesHandler()
          throws TransformerConfigurationException
  {
    return new StylesheetHandler(this);
  }

  /**
   * Look up the value of a feature.
   *
   * <p>The feature name is any fully-qualified URI.  It is
   * possible for an TransformerFactory to recognize a feature name but
   * to be unable to return its value; this is especially true
   * in the case of an adapter for a SAX1 Parser, which has
   * no way of knowing whether the underlying parser is
   * validating, for example.</p>
   *
   * @param name The feature name, which is a fully-qualified URI.
   * @return The current state of the feature (true or false).
   */
  public boolean getFeature(String name)
  {

    // Try first with identity comparison, which 
    // will be faster.
    if ((DOMResult.FEATURE == name) || (DOMSource.FEATURE == name)
            || (SAXResult.FEATURE == name) || (SAXSource.FEATURE == name)
            || (StreamResult.FEATURE == name)
            || (StreamSource.FEATURE == name)
            || (SAXTransformerFactory.FEATURE == name)
            || (SAXTransformerFactory.FEATURE_XMLFILTER == name))
      return true;
    else if ((DOMResult.FEATURE.equals(name))
             || (DOMSource.FEATURE.equals(name))
             || (SAXResult.FEATURE.equals(name))
             || (SAXSource.FEATURE.equals(name))
             || (StreamResult.FEATURE.equals(name))
             || (StreamSource.FEATURE.equals(name))
             || (SAXTransformerFactory.FEATURE.equals(name))
             || (SAXTransformerFactory.FEATURE_XMLFILTER.equals(name)))
      return true;
    else
      return false;
  }
  
  public static boolean m_optimize = true;
  
  /** Flag set by FEATURE_SOURCE_LOCATION.
   * This feature specifies whether the transformation phase should
   * keep track of line and column numbers for the input source
   * document. Note that this works only when that
   * information is available from the source -- in other words, if you
   * pass in a DOM, there's little we can do for you.
   * 
   * The default is false. Setting it true may significantly
   * increase storage cost per node. 
   * 
   * %REVIEW% SAX2DTM is explicitly reaching up to retrieve this global field.
   * We should instead have an architected pathway for passing hints of this
   * sort down from TransformerFactory to Transformer to DTMManager to DTM.
   * */
  public static boolean m_source_location = false;
  
  /**
   * Allows the user to set specific attributes on the underlying
   * implementation.
   *
   * @param name The name of the attribute.
   * @param value The value of the attribute; Boolean or String="true"|"false"
   *
   * @throws IllegalArgumentException thrown if the underlying
   * implementation doesn't recognize the attribute.
   */
  public void setAttribute(String name, Object value)
          throws IllegalArgumentException
  {
    if (name.equals(FEATURE_INCREMENTAL))
    {
      if(value instanceof Boolean)
      {
        // Accept a Boolean object..
        org.apache.xml.dtm.DTMManager.setIncremental(((Boolean)value).booleanValue());
      }
      else if(value instanceof String)
      {
        // .. or a String object
        org.apache.xml.dtm.DTMManager.setIncremental((new Boolean((String)value)).booleanValue());
      }
      else
      {
        // Give a more meaningful error message
        throw new IllegalArgumentException(XSLMessages.createMessage(XSLTErrorResources.ER_BAD_VALUE, new Object[]{name, value})); //name + " bad value " + value);
      }
	}
    else if (name.equals(FEATURE_OPTIMIZE))
    {
      if(value instanceof Boolean)
      {
        // Accept a Boolean object..
        m_optimize = ((Boolean)value).booleanValue();
      }
      else if(value instanceof String)
      {
        // .. or a String object
        m_optimize = (new Boolean((String)value)).booleanValue();
      }
      else
      {
        // Give a more meaningful error message
        throw new IllegalArgumentException(XSLMessages.createMessage(XSLTErrorResources.ER_BAD_VALUE, new Object[]{name, value})); //name + " bad value " + value);
      }
    }
    
    // Custom Xalan feature: annotate DTM with SAX source locator fields.
    // This gets used during SAX2DTM instantiation. 
    //
    // %REVIEW% Should the name of this field really be in XalanProperties?
    // %REVIEW% I hate that it's a global static, but didn't want to change APIs yet.
    else if(name.equals(FEATURE_SOURCE_LOCATION))
    {
      if(value instanceof Boolean)
      {
        // Accept a Boolean object..
        m_source_location = ((Boolean)value).booleanValue();
      }
      else if(value instanceof String)
      {
        // .. or a String object
        m_source_location = (new Boolean((String)value)).booleanValue();
      }
      else
      {
        // Give a more meaningful error message
        throw new IllegalArgumentException(XSLMessages.createMessage(XSLTErrorResources.ER_BAD_VALUE, new Object[]{name, value})); //name + " bad value " + value);
      }
    }
    
    else
    {
      throw new IllegalArgumentException(XSLMessages.createMessage(XSLTErrorResources.ER_NOT_SUPPORTED, new Object[]{name})); //name + "not supported");
    }
  }

  /**
   * Allows the user to retrieve specific attributes on the underlying
   * implementation.
   *
   * @param name The name of the attribute.
   * @return value The value of the attribute.
   *
   * @throws IllegalArgumentException thrown if the underlying
   * implementation doesn't recognize the attribute.
   */
  public Object getAttribute(String name) throws IllegalArgumentException
  {
    if (name.equals(FEATURE_INCREMENTAL))
    {
      return new Boolean(org.apache.xml.dtm.DTMManager.getIncremental());            
    }
    else if (name.equals(FEATURE_OPTIMIZE))
    {
      return new Boolean(m_optimize);
    }
    else if (name.equals(FEATURE_SOURCE_LOCATION))
    {
      return new Boolean(m_source_location);
    }
    else
      throw new IllegalArgumentException(XSLMessages.createMessage(XSLTErrorResources.ER_ATTRIB_VALUE_NOT_RECOGNIZED, new Object[]{name})); //name + " attribute not recognized");
  }

  /**
   * Create an XMLFilter that uses the given source as the
   * transformation instructions.
   *
   * @param src The source of the transformation instructions.
   *
   * @return An XMLFilter object, or null if this feature is not supported.
   *
   * @throws TransformerConfigurationException
   */
  public XMLFilter newXMLFilter(Source src)
          throws TransformerConfigurationException
  {

    Templates templates = newTemplates(src);
    if( templates==null ) return null;
    
    return newXMLFilter(templates);
  }

  /**
   * Create an XMLFilter that uses the given source as the
   * transformation instructions.
   *
   * @param src The source of the transformation instructions.
   *
   * @param templates non-null reference to Templates object.
   *
   * @return An XMLFilter object, or null if this feature is not supported.
   *
   * @throws TransformerConfigurationException
   */
  public XMLFilter newXMLFilter(Templates templates)
          throws TransformerConfigurationException
  {
    try {
      return new TrAXFilter(templates);
    } catch( TransformerConfigurationException ex ) {
      if( m_errorListener != null) {
        try {
          m_errorListener.fatalError( ex );
          return null;
        } catch( TransformerException ex1 ) {
          new TransformerConfigurationException(ex1);
        }
      }
      throw ex;
    }
  }

  /**
   * Get a TransformerHandler object that can process SAX
   * ContentHandler events into a Result, based on the transformation
   * instructions specified by the argument.
   *
   * @param src The source of the transformation instructions.
   *
   * @return TransformerHandler ready to transform SAX events.
   *
   * @throws TransformerConfigurationException
   */
  public TransformerHandler newTransformerHandler(Source src)
          throws TransformerConfigurationException
  {

    Templates templates = newTemplates(src);
    if( templates==null ) return null;
    
    return newTransformerHandler(templates);
  }

  /**
   * Get a TransformerHandler object that can process SAX
   * ContentHandler events into a Result, based on the Templates argument.
   *
   * @param templates The source of the transformation instructions.
   *
   * @return TransformerHandler ready to transform SAX events.
   * @throws TransformerConfigurationException
   */
  public TransformerHandler newTransformerHandler(Templates templates)
          throws TransformerConfigurationException
  {
    try {
      TransformerImpl transformer =
        (TransformerImpl) templates.newTransformer();
      transformer.setURIResolver(m_uriResolver);
      TransformerHandler th =
        (TransformerHandler) transformer.getInputContentHandler(true);

      return th;
    } catch( TransformerConfigurationException ex ) {
      if( m_errorListener != null ) {