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/ScriptedDesignVisitor.java
for ( int i = 0; i < headerSlot.getCount( ); i++ )
		{
			apply( headerSlot.get( i ) );
		}
		
		SlotHandle detailSlot = handle.getDetail( );
		for ( int i = 0; i < detailSlot.getCount( ); i++ )
		{
			apply( detailSlot.get( i ) );
		}
		
		SlotHandle footerSlot = handle.getFooter( );
		for ( int i = 0; i < footerSlot.getCount( ); i++ )
		{
			apply( footerSlot.get( i ) );
		}
		
		SlotHandle groupsSlot = handle.getGroups( );
		for ( int i = 0; i < groupsSlot.getCount( ); i++ )
		{
			apply( groupsSlot.get( i ) );
		}
	}
	public void visitFreeForm( FreeFormHandle handle )
	{
		handleOnPrepare( handle );
		
		SlotHandle slot = handle.getReportItems( );
		for ( int i = 0; i < slot.getCount( ); i++ )
		{