sensoradapter.aj

designpatterns for aop

package designpatterns.adapter.aspectj;

import designpatterns.adapter.model.*;


public aspect SensorAdapter {
	
	declare parents : 
		(TemperatureGauge || RadiationDetector) 
		implements StatusSensor;

	public String TemperatureGauge.getStatus(){
		if(this.readTemperature() > 160){
			return "DANGER";
		}
		return "OK";
	}
	
	public String RadiationDetector.getStatus(){
		if(this.getCurrentRadiationLevel() > 1.5){
			return "DANGER";
		}
		return "OK";
	}
	
	//restricts the use of StatusSensor to a  given package
//	declare error :
//		call(* StatusSensor.*(..)) && !within(designpatterns.adapter.aspectj..*)
//		: "The StatusSensor interface is restricted.";

	//prevents the use of Sensor methods directly, all access must go through
	//StatusSensor
//	declare error :
//		call(* StatusSensor+.*(..)) 
//		&& !call(* StatusSensor.*(..))
//		&& within(AspectJReadout) :
//		"The readout class can only interact with Sensors through StatusSensor";
}