//================================================================
// 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.search;
import javax.constraints.Problem;
import com.exigen.ie.constrainer.Constrainer;
import com.exigen.ie.constrainer.Failure;
import com.exigen.ie.constrainer.Goal;
/**
* This is a native Constrainer's goal created based on a high-level Goal
* passed to it as a parameter. GoalThis simple execute the method "execute"
* of the high-level goal. It is used to implement high-level goals using a low-level
* solver.
*
*/
public class GoalThis extends com.exigen.ie.constrainer.GoalImpl {
javax.constraints.impl.search.goal.Goal goal;
public GoalThis(Constrainer c, javax.constraints.impl.search.goal.Goal goal) {
super(c,goal.getName());
this.goal = goal;
}
public Goal execute() throws Failure {
//goal.trace();
Problem problem = goal.getProblem();
try {
javax.constraints.impl.search.goal.Goal newGoal = goal.execute();
if (newGoal == null)
return null;
else
return (Goal)newGoal.getImpl();
} catch (Failure f) {
//problem.debug("Failure during execution of goal '" + goal.getName()+"'");
throw new Failure();
}
catch (Exception e) {
String msg = "Unexpected exception during execution of goal '" + goal.getName()+"'";
problem.log(msg);
problem.log(e.toString());
e.printStackTrace();
throw new RuntimeException(msg);
}
}
}