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/RenderTask.java
{
		ReportDesignHandle reportDesign = executionContext.getDesign( );
		ReportScriptExecutor.handleBeforeOpenDoc( reportDesign,
				executionContext );
		this.reportDoc = reportDoc;
		executionContext.setReportDocument( reportDoc );
		
		setParameterValues( reportDoc.getParameterValues( ) );
		executionContext.registerGlobalBeans( reportDoc
				.getGlobalVariables( null ) );
		ReportScriptExecutor
				.handleAfterOpenDoc( reportDesign, executionContext );
	}
	protected void closeReportDocument( )
	{
		ReportDesignHandle reportDesign = executionContext.getDesign( );
		ReportScriptExecutor.handleBeforeCloseDoc( reportDesign,
				executionContext );
		reportDoc.close( );
		ReportScriptExecutor.handleAfterCloseDoc( reportDesign,
				executionContext );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IRenderTask#render(long)
	 */
	public void render( long pageNumber ) throws EngineException
	{
		long totalPage = reportDoc.getPageCount( );