TestIntegerSetGenerator.java revision 3c77433663281544363151bf284b0240dfd22a42 
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
17package com.google.common.collect.testing;
18
19import com.google.common.annotations.GwtCompatible;
20import com.google.common.collect.testing.SampleElements.Ints;
21
22import java.util.List;
23import java.util.Set;
24
25/**
26 * Create integer sets for collection tests.
27 *
28 * <p>This class is GWT compatible.
29 *
30 * @author Gregory Kick
31 */
32@GwtCompatible
33public abstract class TestIntegerSetGenerator implements TestSetGenerator<Integer> {
34  @Override public SampleElements<Integer> samples() {
35    return new Ints();
36  }
37
38  @Override public Set<Integer> create(Object... elements) {
39    Integer[] array = new Integer[elements.length];
40    int i = 0;
41    for (Object e : elements) {
42      array[i++] = (Integer) e;
43    }
44    return create(array);
45  }
46
47  protected abstract Set<Integer> create(Integer[] elements);
48
49  @Override public Integer[] createArray(int length) {
50    return new Integer[length];
51  }
52
53  /**
54   * {@inheritDoc}
55   *
56   * <p>By default, returns the supplied elements in their given order; however,
57   * generators for containers with a known order other than insertion order
58   * must override this method.
59   *
60   * <p>Note: This default implementation is overkill (but valid) for an
61   * unordered container. An equally valid implementation for an unordered
62   * container is to throw an exception. The chosen implementation, however, has
63   * the advantage of working for insertion-ordered containers, as well.
64   */
65  @Override public List<Integer> order(List<Integer> insertionOrder) {
66    return insertionOrder;
67  }
68}
69