| /* |
| * Copyright (C) 2014 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; |
| |
| import java.util.Locale; |
| import java.util.concurrent.TimeUnit; |
| |
| import android.content.Context; |
| import android.util.Log; |
| |
| /** |
| * Cache for dictionary facilitators of multiple locales. |
| * This class automatically creates and releases up to 3 facilitator instances using LRU policy. |
| */ |
| public class DictionaryFacilitatorLruCache { |
| private static final String TAG = "DictionaryFacilitatorLruCache"; |
| private static final int WAIT_FOR_LOADING_MAIN_DICT_IN_MILLISECONDS = 1000; |
| private static final int MAX_RETRY_COUNT_FOR_WAITING_FOR_LOADING_DICT = 5; |
| |
| private final Context mContext; |
| private final String mDictionaryNamePrefix; |
| private final Object mLock = new Object(); |
| private final DictionaryFacilitator mDictionaryFacilitator; |
| private boolean mUseContactsDictionary; |
| private Locale mLocale; |
| |
| public DictionaryFacilitatorLruCache(final Context context, final String dictionaryNamePrefix) { |
| mContext = context; |
| mDictionaryNamePrefix = dictionaryNamePrefix; |
| mDictionaryFacilitator = DictionaryFacilitatorProvider.getDictionaryFacilitator( |
| true /* isNeededForSpellChecking */); |
| } |
| |
| private static void waitForLoadingMainDictionary( |
| final DictionaryFacilitator dictionaryFacilitator) { |
| for (int i = 0; i < MAX_RETRY_COUNT_FOR_WAITING_FOR_LOADING_DICT; i++) { |
| try { |
| dictionaryFacilitator.waitForLoadingMainDictionaries( |
| WAIT_FOR_LOADING_MAIN_DICT_IN_MILLISECONDS, TimeUnit.MILLISECONDS); |
| return; |
| } catch (final InterruptedException e) { |
| Log.i(TAG, "Interrupted during waiting for loading main dictionary.", e); |
| if (i < MAX_RETRY_COUNT_FOR_WAITING_FOR_LOADING_DICT - 1) { |
| Log.i(TAG, "Retry", e); |
| } else { |
| Log.w(TAG, "Give up retrying. Retried " |
| + MAX_RETRY_COUNT_FOR_WAITING_FOR_LOADING_DICT + " times.", e); |
| } |
| } |
| } |
| } |
| |
| private void resetDictionariesForLocaleLocked() { |
| // Nothing to do if the locale is null. This would be the case before any get() calls. |
| if (mLocale != null) { |
| // Note: Given that personalized dictionaries are not used here; we can pass null account. |
| mDictionaryFacilitator.resetDictionaries(mContext, mLocale, |
| mUseContactsDictionary, false /* usePersonalizedDicts */, |
| false /* forceReloadMainDictionary */, null /* account */, |
| mDictionaryNamePrefix, null /* listener */); |
| } |
| } |
| |
| public void setUseContactsDictionary(final boolean useContactsDictionary) { |
| synchronized (mLock) { |
| if (mUseContactsDictionary == useContactsDictionary) { |
| // The value has not been changed. |
| return; |
| } |
| mUseContactsDictionary = useContactsDictionary; |
| resetDictionariesForLocaleLocked(); |
| waitForLoadingMainDictionary(mDictionaryFacilitator); |
| } |
| } |
| |
| public DictionaryFacilitator get(final Locale locale) { |
| synchronized (mLock) { |
| if (!mDictionaryFacilitator.isForLocale(locale)) { |
| mLocale = locale; |
| resetDictionariesForLocaleLocked(); |
| } |
| waitForLoadingMainDictionary(mDictionaryFacilitator); |
| return mDictionaryFacilitator; |
| } |
| } |
| |
| public void closeDictionaries() { |
| synchronized (mLock) { |
| mDictionaryFacilitator.closeDictionaries(); |
| } |
| } |
| } |