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/script/internal/DynamicTextScriptExecutor.java
private static IDynamicTextInstance createDynamicTextInstance(
			IContent content, ExecutionContext context )
	{
		return new DynamicTextInstance( content, context );
	}
	private static IDynamicTextEventHandler getEventHandler(
			ReportItemDesign design, ExecutionContext context )
	{
		TextDataHandle handle = (TextDataHandle) design.getHandle( );
		if ( handle == null )
			return null;
		return getEventHandler( handle, context );
	}
	private static IDynamicTextEventHandler getEventHandler(
			TextDataHandle handle, ExecutionContext context )
	{
		IDynamicTextEventHandler eh = null;
		try
		{
			eh = (IDynamicTextEventHandler) getInstance( handle, context );
		}
		catch ( ClassCastException e )
		{
			addClassCastException( context, e, handle.getEventHandlerClass( ),
					IDynamicTextEventHandler.class );
		}
		return eh;
	}
}