blob: 77fe58d4cfd8893e059aaec51cc160b4e233ce95 (
plain)
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
69
70
71
72
73
74
75
|
/*
* Copyright (C) 2007 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 static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.annotations.GwtCompatible;
import java.io.Serializable;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.annotation.Nullable;
/** An ordering for a pre-existing comparator. */
@GwtCompatible(serializable = true)
final class ComparatorOrdering<T> extends Ordering<T> implements Serializable {
final Comparator<T> comparator;
ComparatorOrdering(Comparator<T> comparator) {
this.comparator = checkNotNull(comparator);
}
@Override public int compare(T a, T b) {
return comparator.compare(a, b);
}
// Override just to remove a level of indirection from inner loops
@Override public int binarySearch(List<? extends T> sortedList, T key) {
return Collections.binarySearch(sortedList, key, comparator);
}
// Override just to remove a level of indirection from inner loops
@Override public <E extends T> List<E> sortedCopy(Iterable<E> iterable) {
List<E> list = Lists.newArrayList(iterable);
Collections.sort(list, comparator);
return list;
}
@Override public boolean equals(@Nullable Object object) {
if (object == this) {
return true;
}
if (object instanceof ComparatorOrdering) {
ComparatorOrdering<?> that = (ComparatorOrdering<?>) object;
return this.comparator.equals(that.comparator);
}
return false;
}
@Override public int hashCode() {
return comparator.hashCode();
}
@Override public String toString() {
return comparator.toString();
}
private static final long serialVersionUID = 0;
}
|
