DO NOT REPLY [Bug 12376] New: - TCK: Error should be reported to System.err if there is no registered ErrorListener

[bu...@apache.org]

DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG 
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://nagoya.apache.org/bugzilla/show_bug.cgi?id=12376>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND 
INSERTED IN THE BUG DATABASE.

http://nagoya.apache.org/bugzilla/show_bug.cgi?id=12376

TCK: Error should be reported to System.err if there is no registered ErrorListener

           Summary: TCK: Error should be reported to System.err if there is
                    no registered ErrorListener
           Product: XalanJ2
           Version: CurrentCVS
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: org.apache.xalan.transformer
        AssignedTo: xalan-dev@xml.apache.org
        ReportedBy: mkwan@ca.ibm.com


The Javadoc for ErrorListener says:

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. 

If an application does not register an ErrorListener, errors are reported to 
System.err.


Code to demonstrate the problem:

import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import java.io.*;

public class ErrorListenerTest2
{
   // xsl:template has an invalid attribute (a='1').
   private static String XSL1 = "<xsl:stylesheet version='1.0' 
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>"
                               + "<xsl:template a='1' match='/'>"
                               + "<H1><xsl:value-of select='//title'/></H1>"
                               + "</xsl:template>"
                               + "</xsl:stylesheet>";
                               
   public static void main(String[] args)
   {
        StreamSource source = new StreamSource(new StringReader(XSL1));
        
        try {
            Transformer transformer = TransformerFactory.newInstance
().newTransformer(source);
        } 
        catch (TransformerException e) {
            System.out.println("Error: TransformerException is thrown");
            System.out.println(e);
        }
    }
}

Current output:
Error: TransformerException is thrown
javax.xml.transform.TransformerConfigurationException: javax.xml.transform.Trans
formerConfigurationException: javax.xml.transform.TransformerException: javax.xm
l.transform.TransformerException: "a" attribute is not allowed on the xsl:templa
te element!

The expected behavior is that there is no TransformerException thrown, and the 
error is reported to System.err. You should not see the line "Error: 
TransformerException is thrown". Only the error message is displayed.