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