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/executor/ExecutionContext.java
DesignElementHandle element;
		ArrayList exList = new ArrayList( );
		ArrayList countList = new ArrayList( );
		public ElementExceptionInfo( DesignElementHandle element )
		{
			this.element = element;
		}
		public void addException( BirtException e )
		{
			for ( int i = 0; i < exList.size( ); i++ )
			{
				BirtException err = (BirtException) exList.get( i );
				if ( e.getErrorCode( ) != null
						&& e.getErrorCode( ).equals( err.getErrorCode( ) )
						&& e.getLocalizedMessage( ) != null
						&& e.getLocalizedMessage( ).equals(
								err.getLocalizedMessage( ) ) )
				{
					countList.set( i, new Integer( ( (Integer) countList
							.get( i ) ).intValue( ) + 1 ) );
					return;
				}
			}
			exList.add( e );
			countList.add( new Integer( 1 ) );
		}
		public String getType( )
		{
			if ( element == null )
			{