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.Strings;
21
22import java.util.List;
23import java.util.Set;
24
25/**
26 * Create string sets for collection tests.
27 *
28 * @author Kevin Bourrillion
29 */
30@GwtCompatible
31public abstract class TestStringSetGenerator implements TestSetGenerator<String>
32{
33  @Override
34  public SampleElements<String> samples() {
35    return new Strings();
36  }
37
38  @Override
39  public Set<String> create(Object... elements) {
40    String[] array = new String[elements.length];
41    int i = 0;
42    for (Object e : elements) {
43      array[i++] = (String) e;
44    }
45    return create(array);
46  }
47
48  protected abstract Set<String> create(String[] elements);
49
50  @Override
51  public String[] createArray(int length) {
52    return new String[length];
53  }
54
55  /**
56   * {@inheritDoc}
57   *
58   * <p>By default, returns the supplied elements in their given order; however,
59   * generators for containers with a known order other than insertion order
60   * must override this method.
61   *
62   * <p>Note: This default implementation is overkill (but valid) for an
63   * unordered container. An equally valid implementation for an unordered
64   * container is to throw an exception. The chosen implementation, however, has
65   * the advantage of working for insertion-ordered containers, as well.
66   */
67  @Override
68  public List<String> order(List<String> insertionOrder) {
69    return insertionOrder;
70  }
71}
72