Examples of javax.xml.transform.ErrorListener

javax.xml.transform.ErrorListener

To provide customized error handling, implement this interface and use the setErrorListener method to register an instance of the implmentation with the {@link javax.xml.transform.Transformer}. The Transformer then reports all errors and warnings through this interface.

If an application does not register its own custom ErrorListener, the default ErrorListener is used which reports all warnings and errors to System.err and does not throw any Exceptions. Applications are strongly encouraged to register and use ErrorListeners that insure proper behavior for warnings and errors.

For transformation errors, a Transformer must use this interface instead of throwing an Exception: it is up to the application to decide whether to throw an Exception for different types of errors and warnings. Note however that the Transformer is not required to continue with the transformation after a call to {@link #fatalError(TransformerException exception)}.

Transformers may use this mechanism to report XML parsing errors as well as transformation errors.

   * @throws javax.xml.transform.TransformerException if b is false.
   */
  private void assertion(boolean b, String msg) throws javax.xml.transform.TransformerException
  {


    ErrorListener errorHandler = getErrorListener();


    if (errorHandler != null)
    {
      errorHandler.fatalError(
        new TransformerException(
          XSLMessages.createMessage(
            XPATHErrorResources.ER_INCORRECT_PROGRAMMER_ASSERTION,
            new Object[]{ msg }), (SAXSourceLocator)this.getSAXLocator()));
    }

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  public void warn(XPathContext xctxt, String msg, Object args[])
          throws javax.xml.transform.TransformerException
  {


    String formattedMsg = XSLMessages.createWarning(msg, args);
    ErrorListener errHandler = xctxt.getErrorListener();


    errHandler.warning(new TransformerException(formattedMsg,
                                             (SAXSourceLocator)xctxt.getSAXLocator()));
  }

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      xobj = m_mainExp.execute(xctxt);
    }
    catch (TransformerException te)
    {
      te.setLocator(this.getLocator());
      ErrorListener el = xctxt.getErrorListener();
      if(null != el) // defensive, should never happen.
      {
        el.error(te);
      }
      else
        throw te;
    }
    catch (Exception e)
    {
      while (e instanceof org.apache.xml.utils.WrappedRuntimeException)
      {
        e = ((org.apache.xml.utils.WrappedRuntimeException) e).getException();
      }
      // e.printStackTrace();


      String msg = e.getMessage();
      
      if (msg == null || msg.length() == 0) {
           msg = XSLMessages.createXPATHMessage(
               XPATHErrorResources.ER_XPATH_ERROR, null);
     
      }  
      TransformerException te = new TransformerException(msg,
              getLocator(), e);
      ErrorListener el = xctxt.getErrorListener();
      // te.printStackTrace();
      if(null != el) // defensive, should never happen.
      {
        el.fatalError(te);
      }
      else
        throw te;
    }
    finally

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      return m_mainExp.bool(xctxt);
    }
    catch (TransformerException te)
    {
      te.setLocator(this.getLocator());
      ErrorListener el = xctxt.getErrorListener();
      if(null != el) // defensive, should never happen.
      {
        el.error(te);
      }
      else
        throw te;
    }
    catch (Exception e)
    {
      while (e instanceof org.apache.xml.utils.WrappedRuntimeException)
      {
        e = ((org.apache.xml.utils.WrappedRuntimeException) e).getException();
      }
      // e.printStackTrace();


      String msg = e.getMessage();
      
      if (msg == null || msg.length() == 0) {
           msg = XSLMessages.createXPATHMessage(
               XPATHErrorResources.ER_XPATH_ERROR, null);
     
      }        
      
      TransformerException te = new TransformerException(msg,
              getLocator(), e);
      ErrorListener el = xctxt.getErrorListener();
      // te.printStackTrace();
      if(null != el) // defensive, should never happen.
      {
        el.fatalError(te);
      }
      else
        throw te;
    }
    finally

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          XPathContext xctxt, int sourceNode, String msg, Object[] args)
            throws javax.xml.transform.TransformerException
  {


    String fmsg = XSLMessages.createXPATHWarning(msg, args);
    ErrorListener ehandler = xctxt.getErrorListener();


    if (null != ehandler)
    {


      // TO DO: Need to get stylesheet Locator from here.
      ehandler.warning(new TransformerException(fmsg, (SAXSourceLocator)xctxt.getSAXLocator()));
    }
  }

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          XPathContext xctxt, int sourceNode, String msg, Object[] args)
            throws javax.xml.transform.TransformerException
  {


    String fmsg = XSLMessages.createXPATHMessage(msg, args);
    ErrorListener ehandler = xctxt.getErrorListener();


    if (null != ehandler)
    {
      ehandler.fatalError(new TransformerException(fmsg,
                              (SAXSourceLocator)xctxt.getSAXLocator()));
    }
    else
    {
      SourceLocator slocator = xctxt.getSAXLocator();

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    java.lang.String fmsg = XSLMessages.createXPATHWarning(msg, args);


    if (null != xctxt)
    {
      ErrorListener eh = xctxt.getErrorListener();


      // TO DO: Need to get stylesheet Locator from here.
      eh.warning(new TransformerException(fmsg, xctxt.getSAXLocator()));
    }
  }

View Full Code Here


    java.lang.String fmsg = XSLMessages.createXPATHMessage(msg, args);


    if (null != xctxt)
    {
      ErrorListener eh = xctxt.getErrorListener();
      TransformerException te = new TransformerException(fmsg, this);


      eh.fatalError(te);
    }
  }

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   * @see <a href="http://www.w3.org/TR/xslt#section-Expressions">Section 4 Expressions in XSLT Specification</a>
   */
  public XPath createXPath(String str, ElemTemplateElement owningTemplate)
          throws javax.xml.transform.TransformerException
  {
    ErrorListener handler = m_stylesheetProcessor.getErrorListener();
    XPath xpath = new XPath(str, owningTemplate, this, XPath.SELECT, handler);
    // Visit the expression, registering namespaces for any extension functions it includes.
    xpath.callVisitors(xpath, new ExpressionVisitor(getStylesheetRoot()));
    return xpath;
  }

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   * @see <a href="http://www.w3.org/TR/xslt#patterns">Section 5.2 Patterns in XSLT Specification</a>
   */
  XPath createMatchPatternXPath(String str, ElemTemplateElement owningTemplate)
          throws javax.xml.transform.TransformerException
  {
    ErrorListener handler = m_stylesheetProcessor.getErrorListener();
    XPath xpath = new XPath(str, owningTemplate, this, XPath.MATCH, handler);
    // Visit the expression, registering namespaces for any extension functions it includes.
    xpath.callVisitors(xpath, new ExpressionVisitor(getStylesheetRoot()));
    return xpath;    
  }

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