/********************************************************
  Xpress-BCL Java Example Problems
  ================================

  file xbgoalobj.java
  ```````````````````
  Archimedian and pre-emptive goal programming
  using objective functions.

  (c) 2008-2024 Fair Isaac Corporation
      author: S.Heipcke, 2005, rev. Mar. 2011
********************************************************/

import java.lang.*;
import com.dashoptimization.*;

public class xbgoalobj {
    static final int NGOALS = 3;

    /**** Data ****/
    static final String[] Type = {"perc", "abs", "perc"};
    static final String[] Sense = {"max", "min", "max"};
    static final double[] Weight = {100, 1, 0,1};
    static final double[] Deviation = {10, 4, 20};

    public static void main(String[] args) throws XPRSprobException, XPRSexception {
        XPRBvar x,y;
        XPRBexpr[] goal;
        XPRBexpr wobj;
        XPRBctr[] goalCtr;
        XPRBctr aCtr;
        double[] Target;
        int i,g;

        try (XPRBprob prob = new XPRBprob("Goal"); /* Initialize BCL and create a new problem */
             XPRS xprs = new XPRS()) {             /* Initialize Xpress-Optimizer */

            Target = new double[NGOALS];
            goalCtr = new XPRBctr[NGOALS];
            goal = new XPRBexpr[NGOALS];
            wobj = new XPRBexpr();

            /* Adding the variables */
            x = prob.newVar("x",XPRB.PL);
            y = prob.newVar("y",XPRB.PL);

            /* Adding a constraint */
            aCtr = prob.newCtr("Limit", x.mul(42) .add(y.mul(13)) .lEql(100) );

            /* Goals */
            goal[0] = x.mul(5) .add(y.mul(2)) .add(-20);
            goal[1] = x.mul(-3) .add(y.mul(15)) .add(-48);
            goal[2] = x.mul(1,5) .add(y.mul(21)) .add(-3,8);
            for(g=0;g<NGOALS;g++) goalCtr[g]=prob.newCtr("Goal"+(g+1), Archimedian GP for(g=0;g<NGOALS;g++) if (Sense[g]=="max") else Solution printout Solution: x:=" + x.getSol() + " y:=" + y.getSol());
            System.out.println(" Goal Target System.out.println(=" + (g+1) + " +="      " Prememptive i=-1; while i+=1; (Sense[i]=="max") !=XPRB.LP_OPTIMAL) satisfy goal=" + (i+1));
                        break;
                    }
                    else {
                        Target[i]=prob.getObjVal();
                        if (Type[i]==" Target[i]-=Math.abs(Target[i])*Deviation[i]/100; Target[i]+=Math.abs(Target[i])*Deviation[i]/100; System.out.print("=" + (g+1) + " (goalCtr[g].getType()==XPRB.G?">=  ":" <=  ") + Target[g]);
                if(g==NGOALS-1)
                    System.out.println("   " + prob.getObjVal());
                else
                    System.out.println("   " + (goalCtr[g].getAct() - goalCtr[g].getRHS()
                                                + Target[g]));
            }
        }
    }
}