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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* Copyright (C) 2013 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.inputmethod.latin.personalization;
import android.content.Context;
import android.util.Log;
import com.android.inputmethod.latin.common.FileUtils;
import java.io.File;
import java.io.FilenameFilter;
import java.lang.ref.SoftReference;
import java.util.Locale;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
/**
* Helps handle and manage personalized dictionaries such as {@link UserHistoryDictionary} and
* {@link PersonalizationDictionary}.
*/
public class PersonalizationHelper {
private static final String TAG = PersonalizationHelper.class.getSimpleName();
private static final boolean DEBUG = false;
private static final ConcurrentHashMap<String, SoftReference<UserHistoryDictionary>>
sLangUserHistoryDictCache = new ConcurrentHashMap<>();
private static final ConcurrentHashMap<String, SoftReference<PersonalizationDictionary>>
sLangPersonalizationDictCache = new ConcurrentHashMap<>();
@Nonnull
public static UserHistoryDictionary getUserHistoryDictionary(
final Context context, final Locale locale, @Nullable final String accountName) {
String lookupStr = locale.toString();
if (accountName != null) {
lookupStr += "." + accountName;
}
synchronized (sLangUserHistoryDictCache) {
if (sLangUserHistoryDictCache.containsKey(lookupStr)) {
final SoftReference<UserHistoryDictionary> ref =
sLangUserHistoryDictCache.get(lookupStr);
final UserHistoryDictionary dict = ref == null ? null : ref.get();
if (dict != null) {
if (DEBUG) {
Log.d(TAG, "Use cached UserHistoryDictionary for " + locale +
" & account" + accountName);
}
dict.reloadDictionaryIfRequired();
return dict;
}
}
final UserHistoryDictionary dict = new UserHistoryDictionary(context, locale);
sLangUserHistoryDictCache.put(lookupStr, new SoftReference<>(dict));
return dict;
}
}
private static int sCurrentTimestampForTesting = 0;
public static void currentTimeChangedForTesting(final int currentTimestamp) {
if (TimeUnit.MILLISECONDS.toSeconds(
DictionaryDecayBroadcastReciever.DICTIONARY_DECAY_INTERVAL)
< currentTimestamp - sCurrentTimestampForTesting) {
runGCOnAllOpenedUserHistoryDictionaries();
runGCOnAllOpenedPersonalizationDictionaries();
}
}
public static void runGCOnAllOpenedUserHistoryDictionaries() {
runGCOnAllDictionariesIfRequired(sLangUserHistoryDictCache);
}
public static void runGCOnAllOpenedPersonalizationDictionaries() {
runGCOnAllDictionariesIfRequired(sLangPersonalizationDictCache);
}
private static <T extends DecayingExpandableBinaryDictionaryBase>
void runGCOnAllDictionariesIfRequired(
final ConcurrentHashMap<String, SoftReference<T>> dictionaryMap) {
for (final ConcurrentHashMap.Entry<String, SoftReference<T>> entry
: dictionaryMap.entrySet()) {
final DecayingExpandableBinaryDictionaryBase dict = entry.getValue().get();
if (dict != null) {
dict.runGCIfRequired();
} else {
dictionaryMap.remove(entry.getKey());
}
}
}
public static PersonalizationDictionary getPersonalizationDictionary(
final Context context, final Locale locale) {
final String localeStr = locale.toString();
synchronized (sLangPersonalizationDictCache) {
if (sLangPersonalizationDictCache.containsKey(localeStr)) {
final SoftReference<PersonalizationDictionary> ref =
sLangPersonalizationDictCache.get(localeStr);
final PersonalizationDictionary dict = ref == null ? null : ref.get();
if (dict != null) {
if (DEBUG) {
Log.w(TAG, "Use cached PersonalizationDictionary for " + locale);
}
return dict;
}
}
final PersonalizationDictionary dict = new PersonalizationDictionary(context, locale);
sLangPersonalizationDictCache.put(localeStr, new SoftReference<>(dict));
return dict;
}
}
public static void removeAllPersonalizationDictionaries(final Context context) {
removeAllDictionaries(context, sLangPersonalizationDictCache,
PersonalizationDictionary.NAME);
}
public static void removeAllUserHistoryDictionaries(final Context context) {
removeAllDictionaries(context, sLangUserHistoryDictCache,
UserHistoryDictionary.NAME);
}
private static <T extends DecayingExpandableBinaryDictionaryBase> void removeAllDictionaries(
final Context context, final ConcurrentHashMap<String, SoftReference<T>> dictionaryMap,
final String dictNamePrefix) {
synchronized (dictionaryMap) {
for (final ConcurrentHashMap.Entry<String, SoftReference<T>> entry
: dictionaryMap.entrySet()) {
if (entry.getValue() != null) {
final DecayingExpandableBinaryDictionaryBase dict = entry.getValue().get();
if (dict != null) {
dict.clear();
}
}
}
dictionaryMap.clear();
final File filesDir = context.getFilesDir();
if (filesDir == null) {
Log.e(TAG, "context.getFilesDir() returned null.");
return;
}
if (!FileUtils.deleteFilteredFiles(filesDir, new DictFilter(dictNamePrefix))) {
Log.e(TAG, "Cannot remove all existing dictionary files. filesDir: "
+ filesDir.getAbsolutePath() + ", dictNamePrefix: " + dictNamePrefix);
}
}
}
private static class DictFilter implements FilenameFilter {
private final String mName;
DictFilter(final String name) {
mName = name;
}
@Override
public boolean accept(final File dir, final String name) {
return name.startsWith(mName);
}
}
}
|
