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
* @param labelStmt
	 *            label statement
	 * @param valueStmt
	 *            value statement
	 * @param dataType
	 *            value type
	 * @return
	 */
	private Collection createDynamicSelectionChoices( String dataSetName,
			String labelStmt, String valueStmt, String dataType, int limit,
			boolean fixedOrder )
	{
		ArrayList choices = new ArrayList( );
		ReportDesignHandle report = ( ReportDesignHandle ) this.runnable
				.getDesignHandle( );
		DataSetHandle dataSet = report.findDataSet( dataSetName );
		if ( dataSet != null )
		{
			try
			{
				DataEngine dataEngine = getDataEngine( );
				
				DataSourceHandle dataSource = dataSet.getDataSource( );
				ModelDteApiAdapter adaptor = new ModelDteApiAdapter(
						executionContext.getReportContext(), 
						executionContext.getSharedScope() );
				try
				{
					dataEngine.defineDataSource( adaptor.createDataSourceDesign( dataSource));
					dataEngine.defineDataSet( adaptor.createDataSetDesign( dataSet));