LatinSquareGenerator.java

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package util;
import java.util.Vector;
import java.util.Collections;


/**
 *
 * @author admin
 */
public class LatinSquareGenerator {

  
    private static Vector subOrders = new Vector();
    private static Vector conditions = new Vector();


    private static void fillConditions(){

        //create a vector of our 15 conditions, from 0-14
        for (int i = 0; i<15; i++){
            conditions.add(i, new Integer(i));
        }
    }



    //make the latin square row to determine axis condition order
    static private Vector getRow(int n){

        Vector result = new Vector();

        if (n == 1){
            result.add(0,new Integer(3));
            result.add(1,new Integer(4));
            result.add(2,new Integer(1));
            result.add(3,new Integer(5));
            result.add(4,new Integer(2));
        }
        if (n == 2){
            result.add(new Integer(5));
            result.add(new Integer(1));
            result.add(new Integer(2));
            result.add(new Integer(4));
            result.add(new Integer(3));
        }
        if (n == 3){
            result.add(new Integer(1));
            result.add(new Integer(3));
            result.add(new Integer(5));
            result.add(new Integer(2));
            result.add(new Integer(4));
        }
        if (n == 4){
            result.add(new Integer(4));
            result.add(new Integer(2));
            result.add(new Integer(3));
            result.add(new Integer(1));
            result.add(new Integer(5));
        }
        if (n == 0){
            result.add(new Integer(2));
            result.add(new Integer(5));
            result.add(new Integer(4));
            result.add(new Integer(3));
            result.add(new Integer(1));
        }

        return result;

    }

    //generates a random order of the 6 possible sub-orders
    private static void generateSubOrder(){

        Vector temp = new Vector();

        for (int i = 1; i < 7; i++){
                temp.add(new Integer(i));
            }

        Collections.shuffle(temp);

        for (int i = 0; i < temp.size(); i++){
            switch (((Integer)temp.get(i)).intValue()){
                case 1:
                    subOrders.add(new Integer(0));
                    subOrders.add(new Integer(1));
                    subOrders.add(new Integer(2));
                    break;
                case 2:
                    subOrders.add(new Integer(0));
                    subOrders.add(new Integer(2));
                    subOrders.add(new Integer(1));
                    break;
                case 3:
                    subOrders.add(new Integer(1));
                    subOrders.add(new Integer(0));
                    subOrders.add(new Integer(2));
                    break;
                case 4:
                    subOrders.add(new Integer(1));
                    subOrders.add(new Integer(2));
                    subOrders.add(new Integer(0));
                    break;
                case 5:
                    subOrders.add(new Integer(2));
                    subOrders.add(new Integer(0));
                    subOrders.add(new Integer(1));
                    break;
                case 6:
                    subOrders.add(new Integer(2));
                    subOrders.add(new Integer(1));
                    subOrders.add(new Integer(0));
                    break;
            }

        }

    }

    //take in subject number and generate condition order for 15 conditions
    static public Vector getConditionOrder(int n) {
        Vector result = new Vector();
        Vector numberOrder = new Vector();

        fillConditions();
        generateSubOrder();

        numberOrder = (Vector)getRow(n%5); //gives the overall axis type order

        int count = 0;

        for (int i = 0; i < 5; i++){

            int start = ((Integer)numberOrder.get(i)).intValue(); //tells us which axis type we are drawing from

            int index = (start - 1)*3; //gets us to the appropriate spot on the read-in conditions from BasicJND config file

            //get the index for .3, .6, or .9
            //drawing from the random ordering generated by generateSuborder()
            for (int j = 0; j < 3; j++){
                int curr = ((Integer)subOrders.get(count)).intValue();
                result.add(new Integer(index + curr));
                count++; //move along the suborder vector
            }

        }

        count = 0; //re-set

        subOrders.clear(); //re-set

        numberOrder.clear(); //re-set

        return result;

    }

}