import java.util.Iterator;

/**
 * An inspectable container contains a collection of elements.
 *
 * @version     1.1    March 1, 2001
 * @author      Franck van Breugel
 */
public interface InspectableContainer 
{
    /** 
     * Returns the size of this container. 
     * @return The size of this container.
     */
    public int size();

    /** 
     * Tests if this container is empty. 
     * @return true if this container is empty, false otherwise.
     */
    public boolean isEmpty();

    /**
     * Returns the collection of elements of this container.
     * @return The collection of elements of this container.
     */
    public Iterator elements();
}