Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
if ( fmt == null )
		{
			fmt = new DateFormatter( value, ULocale.forLocale(locale) );
			dateFormatters.put( value, fmt );
		}
		return fmt;
	}
	/**
	 * set the executor used in the execution context
	 * 
	 * @param executor
	 */
	public void setExecutor( IReportExecutor executor )
	{
		this.executor = executor;
	}
	/**
	 * get the executor used to execute the report
	 * 
	 * @return report executor
	 */
	public IReportExecutor getExecutor( )
	{
		return executor;
	}
	public TOCBuilder getTOCBuilder( )
	{
		return tocBuilder;
	}
	public void setTOCBuilder( TOCBuilder builder )