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/*
* 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 com.android.inputmethod.latin.utils.CollectionUtils;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;
import java.lang.ref.SoftReference;
import java.util.concurrent.ConcurrentHashMap;
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 = CollectionUtils.newConcurrentHashMap();
private static final ConcurrentHashMap<String, SoftReference<PersonalizationDictionary>>
sLangPersonalizationDictCache = CollectionUtils.newConcurrentHashMap();
private static final ConcurrentHashMap<String,
SoftReference<PersonalizationPredictionDictionary>>
sLangPersonalizationPredictionDictCache =
CollectionUtils.newConcurrentHashMap();
public static UserHistoryDictionary getUserHistoryDictionary(
final Context context, final String locale) {
synchronized (sLangUserHistoryDictCache) {
if (sLangUserHistoryDictCache.containsKey(locale)) {
final SoftReference<UserHistoryDictionary> ref =
sLangUserHistoryDictCache.get(locale);
final UserHistoryDictionary dict = ref == null ? null : ref.get();
if (dict != null) {
if (DEBUG) {
Log.w(TAG, "Use cached UserHistoryDictionary for " + locale);
}
dict.reloadDictionaryIfRequired();
return dict;
}
}
final UserHistoryDictionary dict = new UserHistoryDictionary(context, locale);
sLangUserHistoryDictCache.put(locale, new SoftReference<UserHistoryDictionary>(dict));
return dict;
}
}
public static void tryDecayingAllOpeningUserHistoryDictionary() {
for (final ConcurrentHashMap.Entry<String, SoftReference<UserHistoryDictionary>> entry
: sLangUserHistoryDictCache.entrySet()) {
if (entry.getValue() != null) {
final UserHistoryDictionary dict = entry.getValue().get();
if (dict != null) {
dict.decayIfNeeded();
}
}
}
}
public static void registerPersonalizationDictionaryUpdateSession(final Context context,
final PersonalizationDictionaryUpdateSession session, String locale) {
final PersonalizationPredictionDictionary predictionDictionary =
getPersonalizationPredictionDictionary(context, locale);
predictionDictionary.registerUpdateSession(session);
final PersonalizationDictionary dictionary = getPersonalizationDictionary(context, locale);
dictionary.registerUpdateSession(session);
}
public static PersonalizationDictionary getPersonalizationDictionary(
final Context context, final String locale) {
synchronized (sLangPersonalizationDictCache) {
if (sLangPersonalizationDictCache.containsKey(locale)) {
final SoftReference<PersonalizationDictionary> ref =
sLangPersonalizationDictCache.get(locale);
final PersonalizationDictionary dict = ref == null ? null : ref.get();
if (dict != null) {
if (DEBUG) {
Log.w(TAG, "Use cached PersonalizationDictCache for " + locale);
}
return dict;
}
}
final PersonalizationDictionary dict = new PersonalizationDictionary(context, locale);
sLangPersonalizationDictCache.put(
locale, new SoftReference<PersonalizationDictionary>(dict));
return dict;
}
}
public static PersonalizationPredictionDictionary getPersonalizationPredictionDictionary(
final Context context, final String locale) {
synchronized (sLangPersonalizationPredictionDictCache) {
if (sLangPersonalizationPredictionDictCache.containsKey(locale)) {
final SoftReference<PersonalizationPredictionDictionary> ref =
sLangPersonalizationPredictionDictCache.get(locale);
final PersonalizationPredictionDictionary dict = ref == null ? null : ref.get();
if (dict != null) {
if (DEBUG) {
Log.w(TAG, "Use cached PersonalizationPredictionDictionary for " + locale);
}
return dict;
}
}
final PersonalizationPredictionDictionary dict =
new PersonalizationPredictionDictionary(context, locale);
sLangPersonalizationPredictionDictCache.put(
locale, new SoftReference<PersonalizationPredictionDictionary>(dict));
return dict;
}
}
}
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