TestStringMapGenerator.java revision 0888a09821a98ac0680fad765217302858e70fa4 
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 * @author Chris Povirk
30 * @author Jared Levy
31 * @author George van den Driessche
32 */
33@GwtCompatible
34public abstract class TestStringMapGenerator
35    implements TestMapGenerator<String, String> {
36
37  @Override
38  public SampleElements<Map.Entry<String, String>> samples() {
39    return new SampleElements<Map.Entry<String, String>>(
40        Helpers.mapEntry("one", "January"),
41        Helpers.mapEntry("two", "February"),
42        Helpers.mapEntry("three", "March"),
43        Helpers.mapEntry("four", "April"),
44        Helpers.mapEntry("five", "May")
45    );
46  }
47
48  @Override
49  public Map<String, String> create(Object... entries) {
50    @SuppressWarnings("unchecked")
51    Entry<String, String>[] array = new Entry[entries.length];
52    int i = 0;
53    for (Object o : entries) {
54      @SuppressWarnings("unchecked")
55      Entry<String, String> e = (Entry<String, String>) o;
56      array[i++] = e;
57    }
58    return create(array);
59  }
60
61  protected abstract Map<String, String> create(
62      Entry<String, String>[] entries);
63
64  @Override
65  @SuppressWarnings("unchecked")
66  public final Entry<String, String>[] createArray(int length) {
67    return new Entry[length];
68  }
69
70  @Override
71  public final String[] createKeyArray(int length) {
72    return new String[length];
73  }
74
75  @Override
76  public final String[] createValueArray(int length) {
77    return new String[length];
78  }
79
80  /** Returns the original element list, unchanged. */
81  @Override
82  public Iterable<Entry<String, String>> order(
83      List<Entry<String, String>> insertionOrder) {
84    return insertionOrder;
85  }
86}
87