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XPathException.javaAPI DocJava SE 6 API8124Tue Jun 10 00:23:12 BST 2008com.sun.org.apache.xpath.internal

XPathException

public class XPathException extends TransformerException
This class implements an exception object that all XPath classes will throw in case of an error. This class extends TransformerException, and may hold other exceptions. In the case of nested exceptions, printStackTrace will dump all the traces of the nested exceptions, not just the trace of this object.
xsl.usage
general

Fields Summary
static final long
serialVersionUID
Object
m_styleNode
The home of the expression that caused the error.
protected Exception
m_exception
A nested exception.
Constructors Summary
public XPathException(String message, ExpressionNode ex)
Create an XPathException object that holds an error message.

param
message The error message.

    super(message);
    this.setLocator(ex);
    setStylesheetNode(getStylesheetNode(ex));
public XPathException(String message)
Create an XPathException object that holds an error message.

param
message The error message.

    super(message);
public XPathException(String message, Object styleNode)
Create an XPathException object that holds an error message and the stylesheet node that the error originated from.

param
message The error message.
param
styleNode The stylesheet node that the error originated from.


    super(message);

    m_styleNode = styleNode;
public XPathException(String message, Node styleNode, Exception e)
Create an XPathException object that holds an error message, the stylesheet node that the error originated from, and another exception that caused this exception.

param
message The error message.
param
styleNode The stylesheet node that the error originated from.
param
e The exception that caused this exception.


    super(message);

    m_styleNode = styleNode;
    this.m_exception = e;
public XPathException(String message, Exception e)
Create an XPathException object that holds an error message, and another exception that caused this exception.

param
message The error message.
param
e The exception that caused this exception.


    super(message);

    this.m_exception = e;
Methods Summary
public java.lang.ThrowablegetException()
Return the embedded exception, if any. Overrides javax.xml.transform.TransformerException.getException().

return
The embedded exception, or null if there is none.

    return m_exception;
protected com.sun.org.apache.xpath.internal.ExpressionNodegetExpressionOwner(com.sun.org.apache.xpath.internal.ExpressionNode ex)
Get the first non-Expression parent of this node.

return
null or first ancestor that is not an Expression.

  	ExpressionNode parent = ex.exprGetParent();
  	while((null != parent) && (parent instanceof Expression))
  		parent = parent.exprGetParent();
  	return parent;
public java.lang.StringgetMessage()
Find the most contained message.

return
The error message of the originating exception.


    String lastMessage = super.getMessage();
    Throwable exception = m_exception;

    while (null != exception)
    {
      String nextMessage = exception.getMessage();

      if (null != nextMessage)
        lastMessage = nextMessage;

      if (exception instanceof TransformerException)
      {
        TransformerException se = (TransformerException) exception;
        Throwable prev = exception;

        exception = se.getException();

        if (prev == exception)
          break;
      }
      else
      {
        exception = null;
      }
    }

    return (null != lastMessage) ? lastMessage : "";
public java.lang.ObjectgetStylesheetNode()
Get the stylesheet node from where this error originated.

return
The stylesheet node from where this error originated, or null.


                         
    
  
    return m_styleNode;
public org.w3c.dom.NodegetStylesheetNode(com.sun.org.apache.xpath.internal.ExpressionNode ex)
Get the XSLT ElemVariable that this sub-expression references. In order for this to work, the SourceLocator must be the owning ElemTemplateElement.

return
The dereference to the ElemVariable, or null if not found.

  	
    ExpressionNode owner = getExpressionOwner(ex);

    if (null != owner && owner instanceof org.w3c.dom.Node)
    {
		return ((org.w3c.dom.Node)owner);
    }
    return null;
public voidprintStackTrace(java.io.PrintStream s)
Print the the trace of methods from where the error originated. This will trace all nested exception objects, as well as this object.

param
s The stream where the dump will be sent to.


    if (s == null)
      s = System.err;

    try
    {
      super.printStackTrace(s);
    }
    catch (Exception e){}

    Throwable exception = m_exception;

    for (int i = 0; (i < 10) && (null != exception); i++)
    {
      s.println("---------");
      exception.printStackTrace(s);

      if (exception instanceof TransformerException)
      {
        TransformerException se = (TransformerException) exception;
        Throwable prev = exception;

        exception = se.getException();

        if (prev == exception)
          break;
      }
      else
      {
        exception = null;
      }
    }
public voidprintStackTrace(java.io.PrintWriter s)
Print the the trace of methods from where the error originated. This will trace all nested exception objects, as well as this object.

param
s The writer where the dump will be sent to.


    if (s == null)
      s = new java.io.PrintWriter(System.err);
        
    try
    {
      super.printStackTrace(s);
    }
    catch (Exception e){}
    
    
    boolean isJdk14OrHigher = false;
    try {
        Throwable.class.getMethod("getCause", (Class[]) null);
        isJdk14OrHigher = true;
    } catch (NoSuchMethodException nsme) {
        // do nothing
    }
        
    // The printStackTrace method of the Throwable class in jdk 1.4 
    // and higher will include the cause when printing the backtrace.
    // The following code is only required when using jdk 1.3 or lower               
    if (!isJdk14OrHigher) {
    	        
      Throwable exception = m_exception;

      for (int i = 0; (i < 10) && (null != exception); i++)
      {
        s.println("---------");

        try
        {
          exception.printStackTrace(s);
        }
        catch (Exception e)
        {
          s.println("Could not print stack trace...");
        }

        if (exception instanceof TransformerException)
        {
          TransformerException se = (TransformerException) exception;
          Throwable prev = exception;

          exception = se.getException();

          if (prev == exception)
          {
            exception = null;

            break;
          }
        }
        else
        {
          exception = null;
        }
      }
    }
public voidsetStylesheetNode(java.lang.Object styleNode)
Set the stylesheet node from where this error originated.

param
styleNode The stylesheet node from where this error originated, or null.

    m_styleNode = styleNode;