Bug 121111 Bad event handler class name does not cause an error
Open a report design, open any Data Set's Property editor. Type in an invalid Java class name for the "Event Handler Class" property, say "aaa". Preview a report that uses that Data Set. The report executes normally. No error is shown. Event handlers are an integral part of a report design, and if a script handler class is not found, or if the handler throws a runtime exception, Report Engine should either stop the report execution, or show the error message in the generated report. (Tested with the 2005-12-15 nightly build)
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/DteDataEngine.java
{
		if ( expr == null )
		{
			return null;
		}
		if ( expr.getHandle( ) != null && !rsStack.isEmpty( ) ) 
		
		{
			try
			{
				Object value = ( ( DteResultSet ) rsStack.getLast( ) )
						.getResultIterator( ).getValue( expr );
				if ( value != null )
				{
					return context.jsToJava( value );
				}
				return null;
			} catch ( BirtException e )
			{
				logger.log( Level.SEVERE, e.getMessage( ), e );
				context.addException( e );
				return null;
			} catch ( JavaScriptException ee )
			{
				logger.log( Level.SEVERE, ee.getMessage( ), ee );
				context.addException( new EngineException(
						MessageConstants.INVALID_EXPRESSION_ERROR, expr, ee ) );
				return null;
			}
		}