javax.constraints.impl.search.goal.GoalLog Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jsr331 Show documentation

JCP Standard JSR331 “Java Constraint Programming API”. It is used for Modeling and Solving Constraint Satisfaction and Optimization Problems using Java and off-the-shelf Constraint/Linear Solvers

The newest version!

//=============================================
// 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
// 
// Common Implementation
// 
//=============================================
package javax.constraints.impl.search.goal;

import javax.constraints.Solver;
import javax.constraints.Var;

public class GoalLog extends Goal {

	String text;
	Var    var;
	Var[]  vars;

	public GoalLog(Solver solver, String text) {
		super(solver, "log");
		this.text = text;
		var = null;
		vars = null;
	}

	public GoalLog(Var var) {
		this("", var);
	}

	public GoalLog(String text, Var var) {
		super(var.getProblem().getSolver(),"log");
		this.text = text;
		this.var = var;
		this.vars = null;
	}

	public GoalLog(Var[] vars) {
		this("",vars);
	}

	public GoalLog(String text, Var[] vars) {
		super(vars[0].getProblem().getSolver(),"log");
		this.text = text;
		this.var = null;
		this.vars = vars;
	}

	public Goal execute() throws Exception {
		StringBuffer buf = new StringBuffer();
		buf.append("\n" + text);
		if (var != null) {
			buf.append(" " + var.toString());
		}
		else {
			if (vars != null) {
				for (int i = 0; i < vars.length; i++) {
					Var v = vars[i];
					buf.append(" " + v.toString());
				}
			}
		}
		getProblem().log(buf.toString());
		return null;
	}
}