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 java.util.Map;
20
21/**
22 * A container class for the five sample elements we need for testing.
23 *
24 * <p>This class is GWT compatible.
25 *
26 * @author Kevin Bourrillion
27 */
28public class SampleElements<E> {
29  // TODO: rename e3, e4 => missing1, missing2
30  public final E e0;
31  public final E e1;
32  public final E e2;
33  public final E e3;
34  public final E e4;
35
36  public SampleElements(E e0, E e1, E e2, E e3, E e4) {
37    this.e0 = e0;
38    this.e1 = e1;
39    this.e2 = e2;
40    this.e3 = e3;
41    this.e4 = e4;
42  }
43
44  public static class Strings extends SampleElements<String> {
45    public Strings() {
46      // elements aren't sorted, to better test SortedSet iteration ordering
47      super("b", "a", "c", "d", "e");
48    }
49
50    // for testing SortedSet and SortedMap methods
51    public static final String BEFORE_FIRST = "\0";
52    public static final String BEFORE_FIRST_2 = "\0\0";
53    public static final String MIN_ELEMENT = "a";
54    public static final String AFTER_LAST = "z";
55    public static final String AFTER_LAST_2 = "zz";
56  }
57
58  public static class Enums extends SampleElements<AnEnum> {
59    public Enums() {
60      // elements aren't sorted, to better test SortedSet iteration ordering
61      super(AnEnum.B, AnEnum.A, AnEnum.C, AnEnum.D, AnEnum.E);
62    }
63  }
64
65  public static <K, V> SampleElements<Map.Entry<K, V>> mapEntries(
66      SampleElements<K> keys, SampleElements<V> values) {
67    return new SampleElements<Map.Entry<K, V>>(
68        Helpers.mapEntry(keys.e0, values.e0),
69        Helpers.mapEntry(keys.e1, values.e1),
70        Helpers.mapEntry(keys.e2, values.e2),
71        Helpers.mapEntry(keys.e3, values.e3),
72        Helpers.mapEntry(keys.e4, values.e4));
73  }
74
75  public static class Unhashables extends SampleElements<UnhashableObject> {
76    public Unhashables() {
77      super(new UnhashableObject(1),
78          new UnhashableObject(2),
79          new UnhashableObject(3),
80          new UnhashableObject(4),
81          new UnhashableObject(5));
82    }
83  }
84
85  public static class Colliders extends SampleElements<Object> {
86    public Colliders() {
87      super(new Collider(1),
88          new Collider(2),
89          new Collider(3),
90          new Collider(4),
91          new Collider(5));
92    }
93  }
94
95  private static class Collider {
96    final int value;
97
98    Collider(int value) {
99      this.value = value;
100    }
101
102    @Override public boolean equals(Object obj) {
103      return obj instanceof Collider && ((Collider) obj).value == value;
104    }
105
106    @Override public int hashCode() {
107      return 1; // evil!
108    }
109  }
110}
111