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
/**
	 * Adapts the specified Model Data Set to a Data Engine API data set design object
	 */
	public IBaseDataSetDesign createDataSetDesign( DataSetHandle dataSet ) 
			throws BirtException
	{
		if ( dataSet instanceof OdaDataSetHandle )
			return newExtendedDataSet( ( OdaDataSetHandle ) dataSet,
					reportContext );
		if ( dataSet instanceof ScriptDataSetHandle )
			return newScriptDataSet( ( ScriptDataSetHandle ) dataSet,
					reportContext );
		
		assert false;
		return null;
	}
	/**
	 * Evaluates a property binding Javascript expression
	 */
	String evaluatePropertyBindingExpr( String expr ) throws BirtException
	{
		Object result = JavascriptEvalUtil.evaluateScript( null,
				jsScope,
				expr,
				"property binding",
				0 );
		return result.toString( );
	}