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/data/dte/AbstractDataEngine.java
* queryExpressionIDs need to be stored in DocumentArchive.
	 */
	protected ArrayList queryExpressionIDs = new ArrayList( );
	/**
	 * the logger
	 */
	protected static Logger logger = Logger.getLogger( DteDataEngine.class
			.getName( ) );
	public void prepare( Report report, Map appContext )
	{
		ReportDesignHandle rptHandle = report.getReportDesign( );
		
		ModelDteApiAdapter adaptor = new ModelDteApiAdapter(
				context.getReportContext(), 
				context.getSharedScope() );
		
		List dataSourceList = rptHandle.getAllDataSources( );
		for ( int i = 0; i < dataSourceList.size( ); i++ )
		{
			DataSourceHandle dataSource = ( DataSourceHandle ) dataSourceList
					.get( i );
			try
			{
				dataEngine.defineDataSource( adaptor.createDataSourceDesign( dataSource));
			} catch ( BirtException be )
			{
				logger.log( Level.SEVERE, be.getMessage( ), be );
				context.addException( dataSource, be );
			}
		}