1 /* 2 * Written by Doug Lea and Martin Buchholz with assistance from 3 * members of JCP JSR-166 Expert Group and released to the public 4 * domain, as explained at 5 * http://creativecommons.org/publicdomain/zero/1.0/ 6 */ 7 8 package jsr166; 9 10 import java.util.Collection; 11 12 /** Allows tests to work with different Collection implementations. */ 13 public interface CollectionImplementation { 14 /** Returns the Collection class. */ 15 public Class<?> klazz(); 16 /** Returns an empty collection. */ 17 public Collection emptyCollection(); 18 public Object makeElement(int i); 19 public boolean isConcurrent(); 20 public boolean permitsNulls(); 21 } 22
