source: EDIS/trunk/java/tracking-ui-core/src/main/flex/gov/va/med/edp/business/ResponderChainingDelegate.as@ 1227

package gov.va.med.edp.business
{
        import com.adobe.cairngorm.business.ServiceLocator;

    import gov.va.med.edp.business.responder.XMLResultFormattingResponder;
    import gov.va.med.edp.business.responder.ServerErrorCheckResponder;
        
        import mx.rpc.AsyncToken;
        import mx.rpc.IResponder;
        
        /**
         * Base class for Cairngorm service delegates that sends IResponder methods
         * to a chain of decorator responders which eventually forward result and fault methods
         * to responder specified on construction. 
         */
        public class ResponderChainingDelegate
        {
                private var responder:IResponder;
                private var service:Object;
                
                public function ResponderChainingDelegate(responder:IResponder, serviceName:String) {
            this.service = ServiceLocator.getInstance().getHTTPService(serviceName);
            this.responder = createResponderChain(responder);
                }
                
                protected function createResponderChain(lastResponder: IResponder) : IResponder {
                        return new XMLResultFormattingResponder(new ServerErrorCheckResponder(lastResponder));
                }
                
                public final function send(params:Object = null) : void {
                        var token:AsyncToken = service.send(params);
                        token.addResponder(responder);
                }
        }
}