1 /*
2  * Copyright (C) 2007 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.google.common.collect.testing;
18 
19 import com.google.common.annotations.GwtCompatible;
20 import com.google.common.collect.testing.SampleElements.Ints;
21 
22 import java.util.List;
23 import java.util.Set;
24 
25 /**
26  * Create integer sets for collection tests.
27  *
28  * @author Gregory Kick
29  */
30 @GwtCompatible
31 public abstract class TestIntegerSetGenerator implements TestSetGenerator<Integer> {
32   @Override public SampleElements<Integer> samples() {
33     return new Ints();
34   }
35 
36   @Override public Set<Integer> create(Object... elements) {
37     Integer[] array = new Integer[elements.length];
38     int i = 0;
39     for (Object e : elements) {
40       array[i++] = (Integer) e;
41     }
42     return create(array);
43   }
44 
45   protected abstract Set<Integer> create(Integer[] elements);
46 
47   @Override public Integer[] createArray(int length) {
48     return new Integer[length];
49   }
50 
51   /**
52    * {@inheritDoc}
53    *
54    * <p>By default, returns the supplied elements in their given order; however,
55    * generators for containers with a known order other than insertion order
56    * must override this method.
57    *
58    * <p>Note: This default implementation is overkill (but valid) for an
59    * unordered container. An equally valid implementation for an unordered
60    * container is to throw an exception. The chosen implementation, however, has
61    * the advantage of working for insertion-ordered containers, as well.
62    */
63   @Override public List<Integer> order(List<Integer> insertionOrder) {
64     return insertionOrder;
65   }
66 }
67