blob: b7275c1f7644e45942e688553635da0a7696e163 (
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
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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.android.launcher3.util;
import java.util.ArrayList;
import java.util.HashMap;
/**
* A utility map from keys to an ArrayList of values.
*/
public class MultiHashMap<K, V> extends HashMap<K, ArrayList<V>> {
public MultiHashMap() { }
public MultiHashMap(int size) {
super(size);
}
public void addToList(K key, V value) {
ArrayList<V> list = get(key);
if (list == null) {
list = new ArrayList<>();
list.add(value);
put(key, list);
} else {
list.add(value);
}
}
@Override
public MultiHashMap<K, V> clone() {
MultiHashMap<K, V> map = new MultiHashMap<>(size());
for (Entry<K, ArrayList<V>> entry : entrySet()) {
map.put(entry.getKey(), new ArrayList<V>(entry.getValue()));
}
return map;
}
}
|
