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/AbstractDataEngine.java
List dataSetList = rptHandle.getAllDataSets( );
		for ( int i = 0; i < dataSetList.size( ); i++ )
		{
			DataSetHandle dataset = ( DataSetHandle ) dataSetList.get( i );
			try
			{
				dataEngine.defineDataSet( adaptor.createDataSetDesign( dataset));
			} catch ( BirtException be )
			{
				logger.log( Level.SEVERE, be.getMessage( ), be );
				context.addException( dataset, be );
			}
		}
		
		new ReportQueryBuilder( ).build( report, context );
		doPrepareQueryID( report, appContext );
	}
	abstract protected void doPrepareQueryID( Report report, Map appContext );
	public IResultSet execute( IBaseQueryDefinition query )
	{
		if ( query instanceof IQueryDefinition )
		{
			return doExecute( query );
		} else if ( query instanceof ISubqueryDefinition )
		{
			return getSubqueryResult( query );
		}
		return null;
	}