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
fmt = new NumberFormatter( value, locale );
			numberFormatters.put( value, fmt );
		}
		return fmt;
	}
	/**
	 * get a date formatter object
	 * 
	 * @param value
	 *            date format
	 * @return formatter object
	 */
	public DateFormatter getDateFormatter( String value )
	{
		DateFormatter fmt = (DateFormatter) dateFormatters.get( value );
		if ( fmt == null )
		{
			fmt = new DateFormatter( value, locale );
			dateFormatters.put( value, fmt );
		}
		return fmt;
	}
	/**
	 * set the executor used in the execution context
	 * 
	 * @param executor
	 */
	public void setExecutor( ReportExecutor executor )
	{
		this.executor = executor;