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/api/impl/RenderTask.java
}
		ExtensionManager extManager = ExtensionManager.getInstance( );
		if ( !extManager.getSupportedFormat( ).contains( format ) )
		{
			log.log( Level.SEVERE,
					MessageConstants.FORMAT_NOT_SUPPORTED_EXCEPTION, format );
			throw new EngineException(
					MessageConstants.FORMAT_NOT_SUPPORTED_EXCEPTION, format );
		}
		IContentEmitter emitter = extManager.createEmitter( format, emitterID );
		if ( emitter == null )
		{
			log.log( Level.SEVERE, "Report engine can not create {0} emitter.",
					format ); 
			throw new EngineException(
					MessageConstants.CANNOT_CREATE_EMITTER_EXCEPTION );
		}
		
		emitter = new LocalizedEmitter( executionContext, emitter );
		
		if ( format.equalsIgnoreCase( "html" ) )
		{
			emitter = new HTMLPaginationEmitter( executor, null, emitter );
		}
		else if ( format.equalsIgnoreCase( "fo" )
				|| format.equalsIgnoreCase( "fop" ) )
		{
			emitter = new DefaultPaginationEmitter( executor, null, emitter );
		}