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/GetParameterDefinitionTask.java
Collection original = ( ( ReportRunnable ) runnable )
				.getParameterDefns( includeParameterGroups );
		Iterator iter = original.iterator( );
		
		
		parameterDefns = new ArrayList( );
		while ( iter.hasNext( ) )
		{
			ParameterDefnBase pBase = ( ParameterDefnBase ) iter.next( );
			try
			{
				parameterDefns.add( pBase.clone( ) );
			} catch ( CloneNotSupportedException e ) 
														
			{
				log.log( Level.SEVERE, e.getMessage( ), e );
			}
		}
		if ( parameterDefns != null )
		{
			iter = parameterDefns.iterator( );
			while ( iter.hasNext( ) )
			{
				IParameterDefnBase pBase = ( IParameterDefnBase ) iter.next( );
				if ( pBase instanceof ScalarParameterDefn )
				{
					( ( ScalarParameterDefn ) pBase ).setReportDesign( runnable
							.getDesignHandle( ).getDesign( ) );
					( ( ScalarParameterDefn ) pBase ).setLocale( locale );
					( ( ScalarParameterDefn ) pBase ).evaluateSelectionList( );