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/script/internal/ScriptExecutor.java
{
	public static final String PROPERTYSEPARATOR = ";";
	public static final String WEBAPP_CLASSPATH_KEY = "webapplication.projectclasspath";
	public static final String WORKSPACE_CLASSPATH_KEY = "workspace.projectclasspath";
	public static final String PROJECT_CLASSPATH_KEY = "user.projectclasspath";
	protected static Logger log = Logger.getLogger( ScriptExecutor.class
			.getName( ) );
	protected static JSScriptStatus handleJS( Object scope, Expression js,
			ExecutionContext context )
	{
		return handleJSInternal( scope, js, context );
	}
	protected static JSScriptStatus handleJS( Object scope, String js,
			ExecutionContext context )
	{
		return handleJSInternal( scope, js, context );
	}
	private static JSScriptStatus handleJSInternal( Object scope, Object js,
			ExecutionContext context )
	{
		if ( js != null )
		{
			if ( !( js instanceof String || js instanceof Expression ) )
				return JSScriptStatus.NO_RUN;
			try