Randomizer.java

import java.util.Random;

/**
 * Provide control over the randomization of the simulation. By using the
 * shared, fixed-seed randomizer, repeated runs will perform exactly the same
 * (which helps with testing). Set 'useShared' to false to get different random
 * behaviour every time.
 *
 * @author Rayan Popat (K21056367) & James Coward (K22004743)
 * @version 2023.02.23
 */

public class Randomizer {
    // The default seed for control of randomization.
    private static final int SEED = 1111;

    // A shared Random object, if required.
    private static final Random rand = new Random(SEED);

    // Determine whether a shared random generator is to be provided.
    private static final boolean useShared = true;

    /**
     * Provide a random generator.
     * 
     * @return A random object.
     */
    public static Random getRandom() {
        if (useShared) {
            return rand;
        } else {
            return new Random();
        }
    }

    /**
     * Reset the randomization.
     * This will have no effect if randomization is not through
     * a shared Random generator.
     */
    public static void reset() {
        if (useShared) {
            rand.setSeed(SEED);
        }
    }
}