transformerhandlerimpl.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,106 行 · 第 1/3 页

    }

    // This is not great, but we really would rather have the error 
    // handler be the error listener if it is a error handler.  Coroutine's fatalError 
    // can't really be configured, so I think this is the best thing right now 
    // for error reporting.  Possibly another JAXP 1.1 hole.  -sb
    javax.xml.transform.ErrorListener errorListener = m_transformer.getErrorListener();
    
    if(errorListener instanceof ErrorHandler)
    {
      ((ErrorHandler)errorListener).fatalError(e);
      if(null != m_errorHandler)
        m_errorHandler.fatalError(e); // may not be called.
    }
    else
    {
      try
      {
        errorListener.fatalError(new javax.xml.transform.TransformerException(e));
        if(null != m_errorHandler)
          m_errorHandler.fatalError(e); // may not be called.
      }
      catch(javax.xml.transform.TransformerException te)
      {
        throw e;
      }
    }
  }

  ////////////////////////////////////////////////////////////////////
  // Implementation of org.xml.sax.ext.LexicalHandler.
  ////////////////////////////////////////////////////////////////////

  /**
   * Report the start of DTD declarations, if any.
   *
   * <p>Any declarations are assumed to be in the internal subset
   * unless otherwise indicated by a {@link #startEntity startEntity}
   * event.</p>
   *
   * <p>Note that the start/endDTD events will appear within
   * the start/endDocument events from ContentHandler and
   * before the first startElement event.</p>
   *
   * @param name The document type name.
   * @param publicId The declared public identifier for the
   *        external DTD subset, or null if none was declared.
   * @param systemId The declared system identifier for the
   *        external DTD subset, or null if none was declared.
   * @throws SAXException The application may raise an
   *            exception.
   * @see #endDTD
   * @see #startEntity
   */
  public void startDTD(String name, String publicId, String systemId)
          throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#startDTD: " + name + ", "
                         + publicId + ", " + systemId);

    if (null != m_lexicalHandler)
    {
      m_lexicalHandler.startDTD(name, publicId, systemId);
    }
  }

  /**
   * Report the end of DTD declarations.
   *
   * @throws SAXException The application may raise an exception.
   * @see #startDTD
   */
  public void endDTD() throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#endDTD");

    if (null != m_lexicalHandler)
    {
      m_lexicalHandler.endDTD();
    }
  }

  /**
   * Report the beginning of an entity in content.
   *
   * <p><strong>NOTE:</entity> entity references in attribute
   * values -- and the start and end of the document entity --
   * are never reported.</p>
   *
   * <p>The start and end of the external DTD subset are reported
   * using the pseudo-name "[dtd]".  All other events must be
   * properly nested within start/end entity events.</p>
   *
   * <p>Note that skipped entities will be reported through the
   * {@link org.xml.sax.ContentHandler#skippedEntity skippedEntity}
   * event, which is part of the ContentHandler interface.</p>
   *
   * @param name The name of the entity.  If it is a parameter
   *        entity, the name will begin with '%'.
   * @throws SAXException The application may raise an exception.
   * @see #endEntity
   * @see org.xml.sax.ext.DeclHandler#internalEntityDecl
   * @see org.xml.sax.ext.DeclHandler#externalEntityDecl
   */
  public void startEntity(String name) throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#startEntity: " + name);

    if (null != m_lexicalHandler)
    {
      m_lexicalHandler.startEntity(name);
    }
  }

  /**
   * Report the end of an entity.
   *
   * @param name The name of the entity that is ending.
   * @throws SAXException The application may raise an exception.
   * @see #startEntity
   */
  public void endEntity(String name) throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#endEntity: " + name);

    if (null != m_lexicalHandler)
    {
      m_lexicalHandler.endEntity(name);
    }
  }

  /**
   * Report the start of a CDATA section.
   *
   * <p>The contents of the CDATA section will be reported through
   * the regular {@link org.xml.sax.ContentHandler#characters
   * characters} event.</p>
   *
   * @throws SAXException The application may raise an exception.
   * @see #endCDATA
   */
  public void startCDATA() throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#startCDATA");

    if (null != m_lexicalHandler)
    {
      m_lexicalHandler.startCDATA();
    }
  }

  /**
   * Report the end of a CDATA section.
   *
   * @throws SAXException The application may raise an exception.
   * @see #startCDATA
   */
  public void endCDATA() throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#endCDATA");

    if (null != m_lexicalHandler)
    {
      m_lexicalHandler.endCDATA();
    }
  }

  /**
   * Report an XML comment anywhere in the document.
   *
   * <p>This callback will be used for comments inside or outside the
   * document element, including comments in the external DTD
   * subset (if read).</p>
   *
   * @param ch An array holding the characters in the comment.
   * @param start The starting position in the array.
   * @param length The number of characters to use from the array.
   * @throws SAXException The application may raise an exception.
   */
  public void comment(char ch[], int start, int length) throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#comment: " + start + ", "
                         + length);

    if (null != m_lexicalHandler)
    {
      m_lexicalHandler.comment(ch, start, length);
    }
  }

  ////////////////////////////////////////////////////////////////////
  // Implementation of org.xml.sax.ext.DeclHandler.
  ////////////////////////////////////////////////////////////////////

  /**
   * Report an element type declaration.
   *
   * <p>The content model will consist of the string "EMPTY", the
   * string "ANY", or a parenthesised group, optionally followed
   * by an occurrence indicator.  The model will be normalized so
   * that all whitespace is removed,and will include the enclosing
   * parentheses.</p>
   *
   * @param name The element type name.
   * @param model The content model as a normalized string.
   * @throws SAXException The application may raise an exception.
   */
  public void elementDecl(String name, String model) throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#elementDecl: " + name + ", "
                         + model);

    if (null != m_declHandler)
    {
      m_declHandler.elementDecl(name, model);
    }
  }

  /**
   * Report an attribute type declaration.
   *
   * <p>Only the effective (first) declaration for an attribute will
   * be reported.  The type will be one of the strings "CDATA",
   * "ID", "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY",
   * "ENTITIES", or "NOTATION", or a parenthesized token group with
   * the separator "|" and all whitespace removed.</p>
   *
   * @param eName The name of the associated element.
   * @param aName The name of the attribute.
   * @param type A string representing the attribute type.
   * @param valueDefault A string representing the attribute default
   *        ("#IMPLIED", "#REQUIRED", or "#FIXED") or null if
   *        none of these applies.
   * @param value A string representing the attribute's default value,
   *        or null if there is none.
   * @throws SAXException The application may raise an exception.
   */
  public void attributeDecl(
          String eName, String aName, String type, String valueDefault, String value)
            throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#attributeDecl: " + eName
                         + ", " + aName + ", etc...");

    if (null != m_declHandler)
    {
      m_declHandler.attributeDecl(eName, aName, type, valueDefault, value);
    }
  }

  /**
   * Report an internal entity declaration.
   *
   * <p>Only the effective (first) declaration for each entity
   * will be reported.</p>
   *
   * @param name The name of the entity.  If it is a parameter
   *        entity, the name will begin with '%'.
   * @param value The replacement text of the entity.
   * @throws SAXException The application may raise an exception.
   * @see #externalEntityDecl
   * @see org.xml.sax.DTDHandler#unparsedEntityDecl
   */
  public void internalEntityDecl(String name, String value)
          throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#internalEntityDecl: " + name
                         + ", " + value);

    if (null != m_declHandler)
    {
      m_declHandler.internalEntityDecl(name, value);
    }
  }

  /**
   * Report a parsed external entity declaration.
   *
   * <p>Only the effective (first) declaration for each entity
   * will be reported.</p>
   *
   * @param name The name of the entity.  If it is a parameter
   *        entity, the name will begin with '%'.
   * @param publicId The declared public identifier of the entity, or
   *        null if none was declared.
   * @param systemId The declared system identifier of the entity.
   * @throws SAXException The application may raise an exception.
   * @see #internalEntityDecl
   * @see org.xml.sax.DTDHandler#unparsedEntityDecl
   */
  public void externalEntityDecl(
          String name, String publicId, String systemId) throws SAXException
  {

    if (DEBUG)
      System.out.println("TransformerHandlerImpl#externalEntityDecl: " + name
                         + ", " + publicId + ", " + systemId);

    if (null != m_declHandler)
    {
      m_declHandler.externalEntityDecl(name, publicId, systemId);
    }
  }

  ////////////////////////////////////////////////////////////////////
  // Internal state.
  ////////////////////////////////////////////////////////////////////

  /** Set to true for diagnostics output.         */
  private static boolean DEBUG = false;

  /**
   * The transformer this will use to transform a
   * source tree into a result tree.
   */
  private TransformerImpl m_transformer;

  /** The system ID to use as a base for relative URLs. */
  private String m_baseSystemID;

  /** The result for the transformation. */
  private Result m_result = null;

  /** The locator for this TransformerHandler. */
  private Locator m_locator = null;

  /** The entity resolver to aggregate to. */
  private EntityResolver m_entityResolver = null;

  /** The DTD handler to aggregate to. */
  private DTDHandler m_dtdHandler = null;

  /** The content handler to aggregate to. */
  private ContentHandler m_contentHandler = null;

  /** The error handler to aggregate to. */
  private ErrorHandler m_errorHandler = null;

  /** The lexical handler to aggregate to. */
  private LexicalHandler m_lexicalHandler = null;

  /** The decl handler to aggregate to. */
  private DeclHandler m_declHandler = null;
  
  /** The Document Table Instance we are transforming. */
  DTM m_dtm;
}