elemliteralresult.java

来自「java jdk 1.4的源码」· Java 代码 · 共 773 行 · 第 1/2 页

  public void setNamespace(String ns)
  {
    if(null == ns) // defensive, shouldn't have to do this.
      ns = "";
    m_namespace = ns;
  }

  /**
   * Get the original namespace of the Literal Result Element.
   * 
   * %REVIEW% Why isn't this overriding the getNamespaceURI method
   * rather than introducing a new one?
   *
   * @return The Namespace URI, or the empty string if the
   *        element has no Namespace URI.
   */
  public String getNamespace()
  {
    return m_namespace;
  }

  /**
   * The local name of the element to be created.
   * @serial
   */
  private String m_localName;

  /**
   * Set the local name of the LRE.
   *
   * @param localName The local name (without prefix) of the result element
   *                  to be created.
   */
  public void setLocalName(String localName)
  {
    m_localName = localName;
  }

  /**
   * Get the local name of the Literal Result Element.
   * Note that after resolvePrefixTables has been called, this will
   * return the aliased name prefix, not the original stylesheet
   * namespace prefix.
   *
   * @return The local name (without prefix) of the result element
   *                  to be created.
   */
  public String getLocalName()
  {
    return m_localName;
  }

  /**
   * The raw name of the element to be created.
   * @serial
   */
  private String m_rawName;

  /**
   * Set the raw name of the LRE.
   *
   * @param rawName The qualified name (with prefix), or the
   *        empty string if qualified names are not available.
   */
  public void setRawName(String rawName)
  {
    m_rawName = rawName;
  }

  /**
   * Get the raw name of the Literal Result Element.
   *
   * @return  The qualified name (with prefix), or the
   *        empty string if qualified names are not available.
   */
  public String getRawName()
  {
    return m_rawName;
  }
	
 /**
   * Get the prefix part of the raw name of the Literal Result Element.
   *
   * @return The prefix, or the empty string if noprefix was provided.
   */
  public String getPrefix()
  {
		int len=m_rawName.length()-m_localName.length()-1;
    return (len>0)
			? m_rawName.substring(0,len)
			: "";
  }


  /**
   * The "extension-element-prefixes" property, actually contains URIs.
   * @serial
   */
  private StringVector m_ExtensionElementURIs;

  /**
   * Set the "extension-element-prefixes" property.
   * @see <a href="http://www.w3.org/TR/xslt#extension-element">extension-element in XSLT Specification</a>
   *
   * @param v Vector of URIs (not prefixes) to set as the "extension-element-prefixes" property
   */
  public void setExtensionElementPrefixes(StringVector v)
  {
    m_ExtensionElementURIs = v;
  }

  /**
   * Get an "extension-element-prefix" property.
   * @see <a href="http://www.w3.org/TR/xslt#extension-element">extension-element in XSLT Specification</a>
   *
   * @param i Index of URI ("extension-element-prefix" property) to get
   *
   * @return URI at given index ("extension-element-prefix" property)
   *
   * @throws ArrayIndexOutOfBoundsException
   */
  public String getExtensionElementPrefix(int i)
          throws ArrayIndexOutOfBoundsException
  {

    if (null == m_ExtensionElementURIs)
      throw new ArrayIndexOutOfBoundsException();

    return m_ExtensionElementURIs.elementAt(i);
  }

  /**
   * Get the number of "extension-element-prefixes" Strings.
   * @see <a href="http://www.w3.org/TR/xslt#extension-element">extension-element in XSLT Specification</a>
   *
   * @return the number of "extension-element-prefixes" Strings
   */
  public int getExtensionElementPrefixCount()
  {
    return (null != m_ExtensionElementURIs)
           ? m_ExtensionElementURIs.size() : 0;
  }

  /**
   * Find out if the given "extension-element-prefix" property is defined.
   * @see <a href="http://www.w3.org/TR/xslt#extension-element">extension-element in XSLT Specification</a>
   *
   * @param uri The URI to find
   *
   * @return True if the given URI is found
   */
  public boolean containsExtensionElementURI(String uri)
  {

    if (null == m_ExtensionElementURIs)
      return false;

    return m_ExtensionElementURIs.contains(uri);
  }

  /**
   * Get an int constant identifying the type of element.
   * @see org.apache.xalan.templates.Constants
   *
   * @return The token ID for this element
   */
  public int getXSLToken()
  {
    return Constants.ELEMNAME_LITERALRESULT;
  }

  /**
   * Return the node name.
   *
   * @return The element's name
   */
  public String getNodeName()
  {

    // TODO: Need prefix.
    return m_rawName;
  }

  /**
   * The XSLT version as specified by this element.
   * @serial
   */
  private String m_version;

  /**
   * Set the "version" property.
   * @see <a href="http://www.w3.org/TR/xslt#forwards">forwards in XSLT Specification</a>
   *
   * @param v Version property value to set
   */
  public void setVersion(String v)
  {
    m_version = v;
  }
  
  /**
   * Get the "version" property.
   * @see <a href="http://www.w3.org/TR/xslt#forwards">forwards in XSLT Specification</a>
   *
   * @return Version property value
   */
  public String getVersion()
  {
    return m_version;
  }

  /**
   * The "exclude-result-prefixes" property.
   * @serial
   */
  private StringVector m_excludeResultPrefixes;

  /**
   * Set the "exclude-result-prefixes" property.
   * The designation of a namespace as an excluded namespace is
   * effective within the subtree of the stylesheet rooted at
   * the element bearing the exclude-result-prefixes or
   * xsl:exclude-result-prefixes attribute; a subtree rooted
   * at an xsl:stylesheet element does not include any stylesheets
   * imported or included by children of that xsl:stylesheet element.
   * @see <a href="http://www.w3.org/TR/xslt#literal-result-element">literal-result-element in XSLT Specification</a>
   *
   * @param v vector of prefixes that are resolvable to strings.
   */
  public void setExcludeResultPrefixes(StringVector v)
  {
    m_excludeResultPrefixes = v;
  }

  /**
   * Tell if the result namespace decl should be excluded.  Should be called before
   * namespace aliasing (I think).
   *
   * @param prefix Prefix of namespace to check
   * @param uri URI of namespace to check
   *
   * @return True if the given namespace should be excluded
   *
   * @throws TransformerException
   */
  private boolean excludeResultNSDecl(String prefix, String uri)
          throws TransformerException
  {

    if (null != m_excludeResultPrefixes)
    {
      return containsExcludeResultPrefix(prefix, uri);
    }

    return false;
  }
  
  /**
   * Copy a Literal Result Element into the Result tree, copy the
   * non-excluded namespace attributes, copy the attributes not
   * of the XSLT namespace, and execute the children of the LRE.
   * @see <a href="http://www.w3.org/TR/xslt#literal-result-element">literal-result-element in XSLT Specification</a>
   *
   * @param transformer non-null reference to the the current transform-time state.
   * @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>.
   * @param mode reference, which may be null, to the <a href="http://www.w3.org/TR/xslt#modes">current mode</a>.
   *
   * @throws TransformerException
   */
  public void execute(
          TransformerImpl transformer)
            throws TransformerException
  {

    try
    {
      ResultTreeHandler rhandler = transformer.getResultTreeHandler();
			
			// JJK Bugzilla 3464, test namespace85 -- make sure LRE's
			// namespace is asserted even if default, since xsl:element
			// may have changed the context.
			rhandler.startPrefixMapping(getPrefix(),getNamespace());

      // Add namespace declarations.
      executeNSDecls(transformer);
      rhandler.startElement(getNamespace(), getLocalName(), getRawName(), null);

      try
      {

        // Process any possible attributes from xsl:use-attribute-sets first
        super.execute(transformer);

        //xsl:version, excludeResultPrefixes???
        // Process the list of avts next
        if (null != m_avts)
        {
          int nAttrs = m_avts.size();

          for (int i = (nAttrs - 1); i >= 0; i--)
          {
            AVT avt = (AVT) m_avts.elementAt(i);
            XPathContext xctxt = transformer.getXPathContext();
            int sourceNode = xctxt.getCurrentNode();
            String stringedValue = avt.evaluate(xctxt, sourceNode, this);

            if (null != stringedValue)
            {

              // Important Note: I'm not going to check for excluded namespace 
              // prefixes here.  It seems like it's too expensive, and I'm not 
              // even sure this is right.  But I could be wrong, so this needs 
              // to be tested against other implementations.
							
              rhandler.addAttribute(avt.getURI(), avt.getName(),
                                    avt.getRawName(), "CDATA", stringedValue);
            }
          }  // end for
        }

        // Now process all the elements in this subtree
        // TODO: Process m_extensionElementPrefixes && m_attributeSetsNames
        transformer.executeChildTemplates(this, true);
      }
      finally
      {
        // If you don't do this in a finally statement, an exception could 
        // cause a system hang.
        rhandler.endElement(getNamespace(), getLocalName(), getRawName());
        unexecuteNSDecls(transformer);
				
				// JJK Bugzilla 3464, test namespace85 -- balance explicit start.
				rhandler.endPrefixMapping(getPrefix());
      }
    }
    catch (org.xml.sax.SAXException se)
    {
      throw new TransformerException(se);
    }
  }

  /**
   * Compiling templates requires that we be able to list the AVTs
   * ADDED 9/5/2000 to support compilation experiment
   *
   * @return an Enumeration of the literal result attributes associated
   * with this element.
   */
  public Enumeration enumerateLiteralResultAttributes()
  {
    return (null == m_avts) ? null : m_avts.elements();
  }
  
    /**
     * Accept a visitor and call the appropriate method 
     * for this class.
     * 
     * @param visitor The visitor whose appropriate method will be called.
     * @return true if the children of the object should be visited.
     */
    protected boolean accept(XSLTVisitor visitor)
    {
      return visitor.visitLiteralResultElement(this);
    }

    /**
     * Call the children visitors.
     * @param visitor The visitor whose appropriate method will be called.
     */
    protected void callChildVisitors(XSLTVisitor visitor, boolean callAttrs)
    {
      if (callAttrs && null != m_avts)
      {
        int nAttrs = m_avts.size();

        for (int i = (nAttrs - 1); i >= 0; i--)
        {
          AVT avt = (AVT) m_avts.elementAt(i);
          avt.callVisitors(visitor);
        }
      }
      super.callChildVisitors(visitor, callAttrs);
    }

}