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/DteDataEngine.java
{
	/**
	 * execution context
	 */
	protected ExecutionContext context;
	/**
	 * data engine
	 */
	protected DataEngine engine;
	/**
	 * Hashmap which map <code>ReportQuery</code> to
	 * <code>PreparedQuery</code>
	 */
	protected HashMap queryMap = new HashMap( );
	/**
	 * the logger
	 */
	protected static Logger logger = Logger.getLogger( DteDataEngine.class
			.getName( ) );
	/**
	 * resultset stack
	 */
	protected LinkedList rsStack = new LinkedList( );
	/**
	 * creates data engine, by first look into the directory specified by
	 * configuration variable odadriver, for oda configuration file. The oda
	 * configuration file is at $odadriver/drivers/driverType/odaconfig.xml.
	 * <p>
	 * 
	 * If the config variable is not set, search configuration file at