TestStringMapGenerator.java revision 3c77433663281544363151bf284b0240dfd22a42 
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
17package com.google.common.collect.testing;
18
19import com.google.common.annotations.GwtCompatible;
20
21import java.util.List;
22import java.util.Map;
23import java.util.Map.Entry;
24
25/**
26 * Implementation helper for {@link TestMapGenerator} for use with maps of
27 * strings.
28 *
29 * <p>This class is GWT compatible.
30 *
31 * @author Chris Povirk
32 * @author Jared Levy
33 * @author George van den Driessche
34 */
35@GwtCompatible
36public abstract class TestStringMapGenerator
37    implements TestMapGenerator<String, String> {
38
39  @Override
40  public SampleElements<Map.Entry<String, String>> samples() {
41    return new SampleElements<Map.Entry<String, String>>(
42        Helpers.mapEntry("one", "January"),
43        Helpers.mapEntry("two", "February"),
44        Helpers.mapEntry("three", "March"),
45        Helpers.mapEntry("four", "April"),
46        Helpers.mapEntry("five", "May")
47    );
48  }
49
50  @Override
51  public Map<String, String> create(Object... entries) {
52    @SuppressWarnings("unchecked")
53    Entry<String, String>[] array = new Entry[entries.length];
54    int i = 0;
55    for (Object o : entries) {
56      @SuppressWarnings("unchecked")
57      Entry<String, String> e = (Entry<String, String>) o;
58      array[i++] = e;
59    }
60    return create(array);
61  }
62
63  protected abstract Map<String, String> create(
64      Entry<String, String>[] entries);
65
66  @Override
67  @SuppressWarnings("unchecked")
68  public final Entry<String, String>[] createArray(int length) {
69    return new Entry[length];
70  }
71
72  @Override
73  public final String[] createKeyArray(int length) {
74    return new String[length];
75  }
76
77  @Override
78  public final String[] createValueArray(int length) {
79    return new String[length];
80  }
81
82  /** Returns the original element list, unchanged. */
83  @Override
84  public Iterable<Entry<String, String>> order(
85      List<Entry<String, String>> insertionOrder) {
86    return insertionOrder;
87  }
88}
89