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1   /*
2    * Copyright (C) 2008 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 java.util.Collections;
21  import java.util.List;
22  import java.util.SortedSet;
23  
24  /**
25   * Create string sets for testing collections that are sorted by natural
26   * ordering.
27   *
28   * @author Jared Levy
29   */
30  @GwtCompatible
31  public abstract class TestStringSortedSetGenerator extends TestStringSetGenerator
32      implements TestSortedSetGenerator<String> {
33  
34    @Override
35    public SortedSet<String> create(Object... elements) {
36      return (SortedSet<String>) super.create(elements);
37    }
38  
39    @Override
40    protected abstract SortedSet<String> create(String[] elements);
41  
42    /** Sorts the elements by their natural ordering. */
43    @Override
44    public List<String> order(List<String> insertionOrder) {
45      Collections.sort(insertionOrder);
46      return insertionOrder;
47    }
48  
49    @Override
50    public String belowSamplesLesser() {
51      return "!! a";
52    }
53  
54    @Override
55    public String belowSamplesGreater() {
56      return "!! b";
57    }
58  
59    @Override
60    public String aboveSamplesLesser() {
61      return "~~ a";
62    }
63  
64    @Override
65    public String aboveSamplesGreater() {
66      return "~~ b";
67    }
68  }