1 /*
2 * Copyright (C) 2009 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 static com.google.common.collect.testing.Helpers.orderEntriesByKey;
20
21 import com.google.common.annotations.GwtCompatible;
22 import java.util.List;
23 import java.util.Map;
24 import java.util.Map.Entry;
25
26 /**
27 * Implementation helper for {@link TestMapGenerator} for use with enum maps.
28 *
29 * @author Kevin Bourrillion
30 */
31 @GwtCompatible
32 public abstract class TestEnumMapGenerator implements TestMapGenerator<AnEnum, String> {
33
34 @Override
35 public SampleElements<Entry<AnEnum, String>> samples() {
36 return new SampleElements<>(
37 Helpers.mapEntry(AnEnum.A, "January"),
38 Helpers.mapEntry(AnEnum.B, "February"),
39 Helpers.mapEntry(AnEnum.C, "March"),
40 Helpers.mapEntry(AnEnum.D, "April"),
41 Helpers.mapEntry(AnEnum.E, "May"));
42 }
43
44 @Override
45 public final Map<AnEnum, String> create(Object... entries) {
46 @SuppressWarnings("unchecked")
47 Entry<AnEnum, String>[] array = new Entry[entries.length];
48 int i = 0;
49 for (Object o : entries) {
50 @SuppressWarnings("unchecked")
51 Entry<AnEnum, String> e = (Entry<AnEnum, String>) o;
52 array[i++] = e;
53 }
54 return create(array);
55 }
56
57 protected abstract Map<AnEnum, String> create(Entry<AnEnum, String>[] entries);
58
59 @Override
60 @SuppressWarnings("unchecked")
61 public final Entry<AnEnum, String>[] createArray(int length) {
62 return new Entry[length];
63 }
64
65 @Override
66 public final AnEnum[] createKeyArray(int length) {
67 return new AnEnum[length];
68 }
69
70 @Override
71 public final String[] createValueArray(int length) {
72 return new String[length];
73 }
74
75 /** Returns the elements sorted in natural order. */
76 @Override
77 public Iterable<Entry<AnEnum, String>> order(List<Entry<AnEnum, String>> insertionOrder) {
78 return orderEntriesByKey(insertionOrder);
79 }
80 }