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
{
	protected DataEngine dataEngine;
	protected ExecutionContext context;
	/*
	 * need not be stored in report document.
	 */
	protected HashMap mapQueryToPreparedQuery = new HashMap( );
	protected HashMap queryIDMap = new HashMap( );
	protected HashMap mapQueryIDToResultSetIDs = new HashMap( );
	/*
	 * store relations of various query ResultSet. Such as relations between
	 * parent ResultSet and nested query ResultSet.
	 * 
	 * need to be stored in report documents.
	 */
	protected ArrayList queryResultRelations = new ArrayList( );
	protected LinkedList queryResultStack = new LinkedList( );
	protected String reportArchName = null;
	protected static final String DATA_META_STREAM = "/Data/hierarchy";
	/*
	 * store expression IDs in the query, which is randomly generated by dte
	 * data engine when preparing the report.
	 *