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/adapter/ModelDteApiAdapter.java
if ( needPropertyBinding( )
						&& bindingExpr != null && bindingExpr.length( ) > 0 )
				{
					propValue = this.evaluatePropertyBindingExpr( bindingExpr );
				}
				else
				{
					propValue = ( String ) staticProps.get( propName );
				}
				dteDataSet.addPublicProperty( ( String ) propName, propValue );
			}
		}
		
		Iterator elmtIter = modelDataSet.privateDriverPropertiesIterator( );
		if ( elmtIter != null )
		{
			while ( elmtIter.hasNext( ) )
			{
				ExtendedPropertyHandle modelProp = ( ExtendedPropertyHandle ) elmtIter
						.next( );
				dteDataSet.addPrivateProperty( modelProp.getName( ), modelProp
						.getValue( ) );
			}
		}
		return dteDataSet;
	}
	IScriptDataSetDesign newScriptDataSet( ScriptDataSetHandle modelDataSet,
			IReportContext reportContext ) throws BirtException
	{
		ScriptDataSetDesign dteDataSet = new ScriptDataSetDesign( modelDataSet