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