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
samples()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
create(Object... entries)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 
create(Entry<AnEnum, String>[] entries)57   protected abstract Map<AnEnum, String> create(Entry<AnEnum, String>[] entries);
58 
59   @Override
60   @SuppressWarnings("unchecked")
createArray(int length)61   public final Entry<AnEnum, String>[] createArray(int length) {
62     return new Entry[length];
63   }
64 
65   @Override
createKeyArray(int length)66   public final AnEnum[] createKeyArray(int length) {
67     return new AnEnum[length];
68   }
69 
70   @Override
createValueArray(int length)71   public final String[] createValueArray(int length) {
72     return new String[length];
73   }
74 
75   /** Returns the elements sorted in natural order. */
76   @Override
order(List<Entry<AnEnum, String>> insertionOrder)77   public Iterable<Entry<AnEnum, String>> order(List<Entry<AnEnum, String>> insertionOrder) {
78     return orderEntriesByKey(insertionOrder);
79   }
80 }
81