1 /*
2  * Copyright (C) 2007 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 com.google.common.collect.testing.SampleElements.Enums;
21 
22 import java.util.Collections;
23 import java.util.List;
24 import java.util.Set;
25 
26 /**
27  * An abstract TestSetGenerator for generating sets containing enum values.
28  *
29  * @author Kevin Bourrillion
30  */
31 @GwtCompatible
32 public abstract class TestEnumSetGenerator implements TestSetGenerator<AnEnum> {
33   @Override
samples()34   public SampleElements<AnEnum> samples() {
35     return new Enums();
36   }
37 
38   @Override
create(Object... elements)39   public Set<AnEnum> create(Object... elements) {
40     AnEnum[] array = new AnEnum[elements.length];
41     int i = 0;
42     for (Object e : elements) {
43       array[i++] = (AnEnum) e;
44     }
45     return create(array);
46   }
47 
create(AnEnum[] elements)48   protected abstract Set<AnEnum> create(AnEnum[] elements);
49 
50   @Override
createArray(int length)51   public AnEnum[] createArray(int length) {
52     return new AnEnum[length];
53   }
54 
55   /**
56    * Sorts the enums according to their natural ordering.
57    */
58   @Override
order(List<AnEnum> insertionOrder)59   public List<AnEnum> order(List<AnEnum> insertionOrder) {
60     Collections.sort(insertionOrder);
61     return insertionOrder;
62   }
63 }
64