ADF Custom error handler not working.

Question

Hi All,
i am using jdev version 11.1.1.5.0. i have created one custom error handler class in model layer which extend DcErrorHandlerImpl class.
and do the entry in Databinding.cpx file
*<Application ErrorHandlerClass="mypackage.classname"/>*
i have override getDisplayMessage(BindingContext ctx, Exception ex) method to show SQL Exception which comes from database table trigger.
code is following-
package com.in.jagran.view.services;
    import java.sql.SQLException;
    import oracle.adf.model.BindingContext;
    import oracle.adf.model.binding.DCErrorHandlerImpl;
    import oracle.jbo.JboException;
    public class AclasErrorHandler extends DCErrorHandlerImpl {
      public AclasErrorHandler(boolean setToThrow) {
        super(setToThrow);
        System.out.println("Inside Error Handler class");
      public AclasErrorHandler() {
          super(true);
       // this(true);
       * Returns the message that will be reported to JSF for each error that occurs.
       * Returning "null" is the way the custom error handler signals that a given exception
       * should not be reported to the client.
      @Override
      public String getDisplayMessage(BindingContext ctx, Exception ex)
        if (ex instanceof oracle.jbo.ValidationException) {
          return super.getDisplayMessage(ctx, ex);
        else {
          // Extract and return the error message that has to be displayed
          Exception exception = ex;
          String message = "";
          // If this exception is an instance of JboException,
          // try to find the cause by recursing over the eventual causing exceptions
          if (exception instanceof JboException)
            Throwable[] exceptionList = ((JboException)exception).getExceptions();
            while (exception instanceof JboException
                    && exceptionList != null && exceptionList.length > 0)
              exception = (Exception)exceptionList[0];
              if (exception instanceof JboException) {
                exceptionList = ((JboException)exception).getExceptions();
          // *** Special processing of SQLExceptions
          if (exception instanceof SQLException) {
            message = exception.getMessage();
            // Ignore the lines in the error message that indicate the line number in the PLSQL code that the error resulted on.
            int ind = message.indexOf("ORA-06512");
            if (ind > 0)
              message = message.substring(0, ind);
          // *** If the the reason for the JboException was data creation exception then display the message
          // of the top JboException (i.e. JBO-*****: Invalid numeric value, date format or time format)
          else if (exception instanceof NumberFormatException || exception instanceof IllegalArgumentException) {
            // Report the top exception
            message = ex.getMessage();
          // Otherwise report the message of the lowest exception in the hierarchy
          else {
            message = exception.getMessage();
          return message;
    }but it is not working for me.
thanks in Advance.

Answer 1

yes i have used dubugger.
i have set break point to following line-
return super.getDisplayMessage(ctx, ex);
if (ex instanceof oracle.jbo.ValidationException) {
        return super.getDisplayMessage(ctx, ex);   
}when atttribute validation done like i have attribute of type number and i have done the validation "must be greater than 0" now when i have given negative value control go to above line.
and i have added following code also in handler class
        @Override
           public void reportException(DCBindingContainer dCBindingContainer,
                                       Exception exception) {
System.out.println(exception.getMessage());
                   super.reportException(dCBindingContainer, exception);
               }now when i have done commit operation control go to here and println statement print follwoing error on log window.
JBO-26041: Failed to post data to database during "Rollback to Savepoint": SQL Statement "null".