elemtemplateelement.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,705 行 · 第 1/4 页

          XMLNSDecl decl = (XMLNSDecl) m_prefixTable.elementAt(i);

          if (!decl.getIsExcluded() && !(null != ignorePrefix && decl.getPrefix().equals(ignorePrefix)))
          {
            rhandler.endPrefixMapping(decl.getPrefix());
          }
        }
      }
    }
    catch(org.xml.sax.SAXException se)
    {
      throw new TransformerException(se);
    }
  }
  
  /** The *relative* document order number of this element.
   *  @serial */
  protected int m_docOrderNumber = -1;
  
  /**
   * Set the UID (document order index).
   *
   * @param kIndex Index of this child.
   */
  public void setUid(int i)
  {
    m_docOrderNumber = i;
  }

  /**
   * Get the UID (document order index).
   *
   * @return Index of this child
   */
  public int getUid()
  {
    return m_docOrderNumber;
  }


  /**
   * Parent node.
   * @serial
   */
  protected ElemTemplateElement m_parentNode;

  /**
   * Get the parent as a Node.
   *
   * @return This node's parent node
   */
  public Node getParentNode()
  {
    return m_parentNode;
  }

  /**
   * Get the parent as an ElemTemplateElement.
   *
   * @return This node's parent as an ElemTemplateElement
   */
  public ElemTemplateElement getParentElem()
  {
    return m_parentNode;
  }

  /**
   * Set the parent as an ElemTemplateElement.
   *
   * @param parent This node's parent as an ElemTemplateElement
   */
  public void setParentElem(ElemTemplateElement p)
  {
    m_parentNode = p;
  }

  /**
   * Next sibling.
   * @serial
   */
  ElemTemplateElement m_nextSibling;

  /**
   * Get the next sibling (as a Node) or return null.
   *
   * @return this node's next sibling or null
   */
  public Node getNextSibling()
  {
    return m_nextSibling;
  }

  /**
   * Get the previous sibling (as a Node) or return null.
   * Note that this may be expensive if the parent has many kids;
   * we accept that price in exchange for avoiding the prev pointer
   * TODO: If we were sure parents and sibs are always ElemTemplateElements,
   * we could hit the fields directly rather than thru accessors.
   *
   * @return This node's previous sibling or null
   */
  public Node getPreviousSibling()
  {

    Node walker = getParentNode(), prev = null;

    if (walker != null)
      for (walker = walker.getFirstChild(); walker != null;
              prev = walker, walker = walker.getNextSibling())
      {
        if (walker == this)
          return prev;
      }

    return null;
  }

  /**
   * Get the previous sibling (as a Node) or return null.
   * Note that this may be expensive if the parent has many kids;
   * we accept that price in exchange for avoiding the prev pointer
   * TODO: If we were sure parents and sibs are always ElemTemplateElements,
   * we could hit the fields directly rather than thru accessors.
   *
   * @return This node's previous sibling or null
   */
  public ElemTemplateElement getPreviousSiblingElem()
  {

    ElemTemplateElement walker = getParentNodeElem();
    ElemTemplateElement prev = null;

    if (walker != null)
      for (walker = walker.getFirstChildElem(); walker != null;
              prev = walker, walker = walker.getNextSiblingElem())
      {
        if (walker == this)
          return prev;
      }

    return null;
  }


  /**
   * Get the next sibling (as a ElemTemplateElement) or return null.
   *
   * @return This node's next sibling (as a ElemTemplateElement) or null 
   */
  public ElemTemplateElement getNextSiblingElem()
  {
    return m_nextSibling;
  }
  
  /**
   * Get the parent element.
   *
   * @return This node's next parent (as a ElemTemplateElement) or null 
   */
  public ElemTemplateElement getParentNodeElem()
  {
    return m_parentNode;
  }


  /**
   * First child.
   * @serial
   */
  ElemTemplateElement m_firstChild;

  /**
   * Get the first child as a Node.
   *
   * @return This node's first child or null
   */
  public Node getFirstChild()
  {
    return m_firstChild;
  }

  /**
   * Get the first child as a ElemTemplateElement.
   *
   * @return This node's first child (as a ElemTemplateElement) or null
   */
  public ElemTemplateElement getFirstChildElem()
  {
    return m_firstChild;
  }

  /**
   * Get the last child.
   *
   * @return This node's last child
   */
  public Node getLastChild()
  {

    ElemTemplateElement lastChild = null;

    for (ElemTemplateElement node = m_firstChild; node != null;
            node = node.m_nextSibling)
    {
      lastChild = node;
    }

    return lastChild;
  }

  /**
   * Get the last child.
   *
   * @return This node's last child
   */
  public ElemTemplateElement getLastChildElem()
  {

    ElemTemplateElement lastChild = null;

    for (ElemTemplateElement node = m_firstChild; node != null;
            node = node.m_nextSibling)
    {
      lastChild = node;
    }

    return lastChild;
  }


  /** DOM backpointer that this element originated from.          */
  transient private org.w3c.dom.Node m_DOMBackPointer;

  /**
   * If this stylesheet was created from a DOM, get the
   * DOM backpointer that this element originated from.
   * For tooling use.
   *
   * @return DOM backpointer that this element originated from or null.
   */
  public org.w3c.dom.Node getDOMBackPointer()
  {
    return m_DOMBackPointer;
  }

  /**
   * If this stylesheet was created from a DOM, set the
   * DOM backpointer that this element originated from.
   * For tooling use.
   *
   * @param n DOM backpointer that this element originated from.
   */
  public void setDOMBackPointer(org.w3c.dom.Node n)
  {
    m_DOMBackPointer = n;
  }

  /**
   * Compares this object with the specified object for precedence order.
   * The order is determined by the getImportCountComposed() of the containing
   * composed stylesheet and the getUid() of this element.
   * Returns a negative integer, zero, or a positive integer as this
   * object is less than, equal to, or greater than the specified object.
   * 
   * @param o The object to be compared to this object
   * @returns a negative integer, zero, or a positive integer as this object is
   *          less than, equal to, or greater than the specified object.
   * @throws ClassCastException if the specified object's
   *         type prevents it from being compared to this Object.
   */
  public int compareTo(Object o) throws ClassCastException {
    
    ElemTemplateElement ro = (ElemTemplateElement) o;
    int roPrecedence = ro.getStylesheetComposed().getImportCountComposed();
    int myPrecedence = this.getStylesheetComposed().getImportCountComposed();

    if (myPrecedence < roPrecedence)
      return -1;
    else if (myPrecedence > roPrecedence)
      return 1;
    else
      return this.getUid() - ro.getUid();
  }
  
  /**
   * Get information about whether or not an element should strip whitespace.
   * @see <a href="http://www.w3.org/TR/xslt#strip">strip in XSLT Specification</a>
   *
   * @param support The XPath runtime state.
   * @param targetElement Element to check
   *
   * @return true if the whitespace should be stripped.
   *
   * @throws TransformerException
   */
  public boolean shouldStripWhiteSpace(
          org.apache.xpath.XPathContext support, 
          org.w3c.dom.Element targetElement) throws TransformerException
  {
    StylesheetRoot sroot = this.getStylesheetRoot();
    return (null != sroot) ? sroot.shouldStripWhiteSpace(support, targetElement) :false;
  }
  
  /**
   * Get information about whether or not whitespace can be stripped.
   * @see <a href="http://www.w3.org/TR/xslt#strip">strip in XSLT Specification</a>
   *
   * @return true if the whitespace can be stripped.
   */
  public boolean canStripWhiteSpace()
  {
    StylesheetRoot sroot = this.getStylesheetRoot();
    return (null != sroot) ? sroot.canStripWhiteSpace() : false;
  }
  
  /**
   * Tell if this element can accept variable declarations.
   * @return true if the element can accept and process variable declarations.
   */
  public boolean canAcceptVariables()
  {
  	return true;
  }
  
  //=============== ExpressionNode methods ================
  
  /** 
   * Set the parent of this node.
   * @param n Must be a ElemTemplateElement.
   */
  public void exprSetParent(ExpressionNode n)
  {
  	// This obviously requires that only a ElemTemplateElement can 
  	// parent a node of this type.
  	setParentElem((ElemTemplateElement)n);
  }
  
  /**
   * Get the ExpressionNode parent of this node.
   */
  public ExpressionNode exprGetParent()
  {
  	return getParentElem();
  }

  /** 
   * This method tells the node to add its argument to the node's
   * list of children. 
   * @param n Must be a ElemTemplateElement. 
   */
  public void exprAddChild(ExpressionNode n, int i)
  {
  	appendChild((ElemTemplateElement)n);
  }

  /** This method returns a child node.  The children are numbered
     from zero, left to right. */
  public ExpressionNode exprGetChild(int i)
  {
  	return (ExpressionNode)item(i);
  }

  /** Return the number of children the node has. */
  public int exprGetNumChildren()
  {
  	return getLength();
  }
  
  /**
   * 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.visitInstruction(this);
  }

  /**
   * @see XSLTVisitable#callVisitors(XSLTVisitor)
   */
  public void callVisitors(XSLTVisitor visitor)
  {
  	if(accept(visitor))
  	{
		callChildVisitors(visitor);
  	}
  }

  /**
   * Call the children visitors.
   * @param visitor The visitor whose appropriate method will be called.
   */
  protected void callChildVisitors(XSLTVisitor visitor, boolean callAttributes)
  {
    for (ElemTemplateElement node = m_firstChild;
      node != null;
      node = node.m_nextSibling)
      {
      node.callVisitors(visitor);
    }
  }
  
  /**
   * Call the children visitors.
   * @param visitor The visitor whose appropriate method will be called.
   */
  protected void callChildVisitors(XSLTVisitor visitor)
  {
  	callChildVisitors(visitor, true);
  }


	/**
	 * @see PrefixResolver#handlesNullPrefixes()
	 */
	public boolean handlesNullPrefixes() {
		return false;
	}

}