109 lines
4.1 KiB
Java
109 lines
4.1 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.latin.personalization;
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import android.content.Context;
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import android.util.Log;
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import com.android.inputmethod.latin.common.FileUtils;
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import java.io.File;
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import java.io.FilenameFilter;
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import java.lang.ref.SoftReference;
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import java.util.Locale;
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import java.util.concurrent.ConcurrentHashMap;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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/**
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* Helps handle and manage personalized dictionaries such as {@link UserHistoryDictionary}.
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*/
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public class PersonalizationHelper {
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private static final String TAG = PersonalizationHelper.class.getSimpleName();
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private static final boolean DEBUG = false;
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private static final ConcurrentHashMap<String, SoftReference<UserHistoryDictionary>>
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sLangUserHistoryDictCache = new ConcurrentHashMap<>();
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@Nonnull
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public static UserHistoryDictionary getUserHistoryDictionary(
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final Context context, final Locale locale, @Nullable final String accountName) {
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String lookupStr = locale.toString();
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if (accountName != null) {
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lookupStr += "." + accountName;
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}
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synchronized (sLangUserHistoryDictCache) {
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if (sLangUserHistoryDictCache.containsKey(lookupStr)) {
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final SoftReference<UserHistoryDictionary> ref =
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sLangUserHistoryDictCache.get(lookupStr);
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final UserHistoryDictionary dict = ref == null ? null : ref.get();
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if (dict != null) {
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if (DEBUG) {
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Log.d(TAG, "Use cached UserHistoryDictionary with lookup: " + lookupStr);
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}
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dict.reloadDictionaryIfRequired();
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return dict;
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}
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}
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final UserHistoryDictionary dict = new UserHistoryDictionary(
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context, locale, accountName);
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sLangUserHistoryDictCache.put(lookupStr, new SoftReference<>(dict));
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return dict;
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}
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}
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public static void removeAllUserHistoryDictionaries(final Context context) {
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synchronized (sLangUserHistoryDictCache) {
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for (final ConcurrentHashMap.Entry<String, SoftReference<UserHistoryDictionary>> entry
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: sLangUserHistoryDictCache.entrySet()) {
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if (entry.getValue() != null) {
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final UserHistoryDictionary dict = entry.getValue().get();
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if (dict != null) {
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dict.clear();
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}
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}
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}
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sLangUserHistoryDictCache.clear();
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final File filesDir = context.getFilesDir();
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if (filesDir == null) {
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Log.e(TAG, "context.getFilesDir() returned null.");
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return;
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}
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final boolean filesDeleted = FileUtils.deleteFilteredFiles(
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filesDir, new DictFilter(UserHistoryDictionary.NAME));
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if (!filesDeleted) {
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Log.e(TAG, "Cannot remove dictionary files. filesDir: " + filesDir.getAbsolutePath()
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+ ", dictNamePrefix: " + UserHistoryDictionary.NAME);
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}
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}
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}
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private static class DictFilter implements FilenameFilter {
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private final String mName;
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DictFilter(final String name) {
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mName = name;
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}
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@Override
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public boolean accept(final File dir, final String name) {
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return name.startsWith(mName);
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}
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}
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}
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