TestUnhashableCollectionGenerator.java revision 7dd252788645e940eada959bdde927426e2531c9 
1/*
2 * Copyright (C) 2009 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
17package com.google.common.collect.testing;
18
19import com.google.common.annotations.GwtCompatible;
20import com.google.common.collect.testing.SampleElements.Unhashables;
21
22import java.util.Collection;
23import java.util.List;
24
25/**
26 * Creates collections containing unhashable sample elements, to be tested.
27 *
28 * <p>This class is GWT compatible.
29 *
30 * @author Regina O'Dell
31 */
32@GwtCompatible
33public abstract class
34    TestUnhashableCollectionGenerator<T extends Collection<UnhashableObject>>
35    implements TestCollectionGenerator<UnhashableObject> {
36  @Override
37  public SampleElements<UnhashableObject> samples() {
38    return new Unhashables();
39  }
40
41  @Override
42  public T create(Object... elements) {
43    UnhashableObject[] array = createArray(elements.length);
44    int i = 0;
45    for (Object e : elements) {
46      array[i++] = (UnhashableObject) e;
47    }
48    return create(array);
49  }
50
51  /**
52   * Creates a new collection containing the given elements; implement this
53   * method instead of {@link #create(Object...)}.
54   */
55  protected abstract T create(UnhashableObject[] elements);
56
57  @Override
58  public UnhashableObject[] createArray(int length) {
59    return new UnhashableObject[length];
60  }
61
62  @Override
63  public Iterable<UnhashableObject> order(
64      List<UnhashableObject> insertionOrder) {
65    return insertionOrder;
66  }
67}
68