/** Chapter 2, Exercise Set 2, Question 1
 *  Write a simple driver program that constructs a BoundedEnv
 *  environment and then tests answers to Analysis Question Set 3.
 **/

public class Ch2ExSet2Q1
{
  // Specify number of rows and columns in environment.
  private static final int ENV_ROWS = 20;  // rows in environment
  private static final int ENV_COLS = 20;  // columns in environment

  /** Start the Marine Biology Simulation program.
   *  The String arguments (args) are not used in this application.
   **/
  public static void main(String[] args)
  {
    // Construct an empty environment and several fish in the context
    // of that environment.
    BoundedEnv env = new BoundedEnv(ENV_ROWS, ENV_COLS);

    // Set up the information given in Analysis Question Set 3
    Location loc1 = new Location(7, 3);
    Location loc2 = new Location(2, 6);
    Location loc3 = new Location(4, 8);
    Fish f1 = new Fish(env, loc1);
    Fish f2 = new Fish(env, loc2);

    // Question 1
    System.out.println("number of objects:  " + env.numObjects());

    // Question 2
    System.out.println("Objects in the environment are: ");
    Locatable[] fishList = env.allObjects();
    for ( int index = 0; index < fishList.length; index++ )
    {
      System.out.println((Fish) fishList[index]);
    }

    // Question 3
    System.out.println("Is loc1 empty? " + env.isEmpty(loc1));

    // Question 4
    System.out.println("Is loc3 empty? " + env.isEmpty(loc3));

    // Question 5
    System.out.println("The object at loc2 is  " +
                         (Fish)env.objectAt(loc2));

    // Question 6 (documentation says should return null)
    System.out.println("The object at loc3 is  " +
                         (Fish)env.objectAt(loc3));
  }
}