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 
17 package com.google.common.collect.testing;
18 
19 import com.google.common.annotations.GwtCompatible;
20 
21 import java.util.List;
22 import java.util.Map;
23 import java.util.Set;
24 
25 /**
26  * Creates map entries using sample keys and sample values.
27  *
28  * @author Jesse Wilson
29  */
30 @GwtCompatible
31 public abstract class TestMapEntrySetGenerator<K, V>
32     implements TestSetGenerator<Map.Entry<K, V>> {
33   private final SampleElements<K> keys;
34   private final SampleElements<V> values;
35 
TestMapEntrySetGenerator( SampleElements<K> keys, SampleElements<V> values)36   protected TestMapEntrySetGenerator(
37       SampleElements<K> keys, SampleElements<V> values) {
38     this.keys = keys;
39     this.values = values;
40   }
41 
42   @Override
samples()43   public SampleElements<Map.Entry<K, V>> samples() {
44     return SampleElements.mapEntries(keys, values);
45   }
46 
47   @Override
create(Object... elements)48   public Set<Map.Entry<K, V>> create(Object... elements) {
49     Map.Entry<K, V>[] entries = createArray(elements.length);
50     System.arraycopy(elements, 0, entries, 0, elements.length);
51     return createFromEntries(entries);
52   }
53 
createFromEntries( Map.Entry<K, V>[] entries)54   public abstract Set<Map.Entry<K, V>> createFromEntries(
55       Map.Entry<K, V>[] entries);
56 
57   @Override
58   @SuppressWarnings("unchecked") // generic arrays make typesafety sad
createArray(int length)59   public Map.Entry<K, V>[] createArray(int length) {
60     return new Map.Entry[length];
61   }
62 
63   /** Returns the original element list, unchanged. */
64   @Override
order(List<Map.Entry<K, V>> insertionOrder)65   public List<Map.Entry<K, V>> order(List<Map.Entry<K, V>> insertionOrder) {
66     return insertionOrder;
67   }
68 }
69