1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* Copyright (C) 2009 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.collect;
import com.google.common.annotations.GwtCompatible;
import java.io.Serializable;
import java.util.Arrays;
/**
* A class that implements {@code Comparable} without generics, such as those found in libraries
* that support Java 1.4 and before. Our library needs to do the bare minimum to accommodate such
* types, though their use may still require an explicit type parameter and/or warning suppression.
*
* @author Kevin Bourrillion
*/
@SuppressWarnings("ComparableType")
@GwtCompatible
class LegacyComparable implements Comparable, Serializable {
static final LegacyComparable X = new LegacyComparable("x");
static final LegacyComparable Y = new LegacyComparable("y");
static final LegacyComparable Z = new LegacyComparable("z");
static final Iterable<LegacyComparable> VALUES_FORWARD = Arrays.asList(X, Y, Z);
static final Iterable<LegacyComparable> VALUES_BACKWARD = Arrays.asList(Z, Y, X);
private final String value;
LegacyComparable(String value) {
this.value = value;
}
@Override
public int compareTo(Object object) {
// This method is spec'd to throw CCE if object is of the wrong type
LegacyComparable that = (LegacyComparable) object;
return this.value.compareTo(that.value);
}
@Override
public boolean equals(Object object) {
if (object instanceof LegacyComparable) {
LegacyComparable that = (LegacyComparable) object;
return this.value.equals(that.value);
}
return false;
}
@Override
public int hashCode() {
return value.hashCode();
}
private static final long serialVersionUID = 0;
}
|
