//================================================================
// J A V A C O M M U N I T Y P R O C E S S
//
// J S R 3 3 1
//
// CONSTRAINER-BASED REFERENCE IMPLEMENTATION
//
// Copyright (c) Cork Constraint Computation Centre, 2010
// University College Cork, Cork, Ireland, www.4c.ucc.ie
// Constrainer is copyrighted by Exigen Group, USA.
//
//================================================================
package javax.constraints.impl;
import javax.constraints.extra.PropagationEvent;
import javax.constraints.extra.Propagator;
import com.exigen.ie.constrainer.EventOfInterest;
import com.exigen.ie.constrainer.Failure;
import com.exigen.ie.constrainer.Observer;
import com.exigen.ie.constrainer.Subject;
public class ConstrainerPropagator extends Observer {
Propagator propagator;
javax.constraints.Constraint cpConstraint;
PropagationEvent event;
public ConstrainerPropagator(Propagator propagator, PropagationEvent event) {
super();
this.propagator = propagator;
this.event = event;
}
public void update(Subject exp, EventOfInterest interest) throws Failure{
// PropagationEvent event = PropagationEvent.ANY;
// if(interest.isValueEvent())
// event = PropagationEvent.VALUE;
// else
// if(interest.isMinEvent())
// event = PropagationEvent.MIN;
// else
// if(interest.isMaxEvent())
// event = PropagationEvent.MAX;
// else
// if(interest.isRemoveEvent())
// event = PropagationEvent.REMOVE;
// //Range and Any events may not be recognized inside PropagatorI
try {
propagator.propagate(event);
} catch (Exception e) {
throw new Failure();
}
}
public int subscriberMask(){
int eventMask = -1;
switch (event) {
case VALUE:
eventMask = EventOfInterest.VALUE;
break;
case MIN:
eventMask = EventOfInterest.MIN;
break;
case MAX:
eventMask = EventOfInterest.MAX;
break;
case REMOVE:
eventMask = EventOfInterest.REMOVE;
break;
case RANGE:
eventMask = EventOfInterest.MINMAX;
break;
case ANY:
eventMask = EventOfInterest.ALL;
}
if (eventMask == -1)
throw new RuntimeException("ERROR: unknown event "+event);
return eventMask;
}
public Object master(){
return this;
}
}