Scalaskel.java

package codeStory2013;

import java.util.*;

/**
 * .
 *
 * @author fsznajderman
 *         date :  03/02/13
 */
public class Scalaskel {


    private List<Integer> bars = new ArrayList<Integer>();
    private List<Integer> qixs = new ArrayList<Integer>();
    private List<Integer> bazs = new ArrayList<Integer>();


    public Scalaskel() {
        bars = range(Cent.BAR.getVal());
        qixs = range(Cent.QIX.getVal());
        bazs = range(Cent.BAZ.getVal());
    }


    public Map<Cent, Integer> compute(final Integer sum) {

        //bar
        Integer barVal = isInDomain(sum, bars, Cent.BAR);
        //qix
        Integer qixVal = isInDomain(sum, qixs, Cent.QIX);
        //baz
        Integer bazVal = isInDomain(sum, bazs, Cent.BAZ);

        final Map<Cent, Integer> result = new HashMap<Cent, Integer>();
        if (barVal != null) {
            result.put(Cent.BAR, barVal);
        }
        if (qixVal != null) {
            result.put(Cent.QIX, qixVal);
        }
        if (bazVal != null) {
            result.put(Cent.BAZ, bazVal);
        }

        result.put(Cent.FOO, sum);

        return result;

    }

    private Integer isInDomain(final Integer sum, final List l, final Cent cents) {

        int idx = l.indexOf(sum);
        if (idx != -1) {
            return idx;
        }
        return null;
    }


    private List<Integer> range(final Integer step) {

        final List<Integer> r = new ArrayList<Integer>();
        for (int i = 0; i < 100; i = i + step) {
            r.add(i);
        }

        return r;
    }

}


enum Cent {

    FOO( 1),
    BAR(7),
    QIX(11),
    BAZ(21);

    private int val;

    Cent(int val) {
       
        this.val = val;
    }

    public int getVal() {
        return val;
    }
}