import java.util.Iterator;

/**
 * Iterable collection of Pair objects
 * 
 * @author Michael S. Kirkpatrick and Nathan Sprague
 * @version V1, 8/2017
 */
public class Pairs<K, V> implements Iterable<Pair<K, V>> {

  /* Declare a fixed-size array (maximum 10 elements) of Pair objects */

  /**
   * Create a collection that will store items added as pairs.
   */
  public Pairs() {}

  /**
   * Create a new Pair and add it to the collection if there's space.
   * 
   * @param first The first object.
   * @param second The second object.
   */
  public boolean addPair(K first, V second) {
    return true;
  }

  /*
   * Implement an Iterator here based on the API documentation at
   * https://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html Throw the
   * exceptions as specified
   */
  @Override
  public Iterator<Pair<K, V>> iterator() {
    return new Iterator<Pair<K, V>>() {
      /**
       * Return a Boolean indicating whether more items are left.
       */
      @Override
      public boolean hasNext() {
        throw new UnsupportedOperationException();
      }

      /**
       * Return the next Pair in the iterator.
       */
      @Override
      public Pair<K, V> next() {
        throw new UnsupportedOperationException();
      }

      /**
       * Remove the previous Pair returned by next() from the LinkedList.
       */
      @Override
      public void remove() {
        throw new UnsupportedOperationException();
      }
    };
  }

}