am a4c73066: am ef084229: Merge "Use reentrant lock for main dictionaries." (c8a82edf) · Commits · e / os / android_packages_inputmethods_LatinIME

java/src/com/android/inputmethod/latin/DictionaryFactory.java

+15 −16

Original line number	Diff line number	Diff line
		@@ -51,7 +51,7 @@ public final class DictionaryFactory {
		if (null == locale) {
		Log.e(TAG, "No locale defined for dictionary");
		return new DictionaryCollection(Dictionary.TYPE_MAIN,
		createBinaryDictionary(context, locale));
		createReadOnlyBinaryDictionary(context, locale));
		}

		final LinkedList<Dictionary> dictList = CollectionUtils.newLinkedList();
		@@ -59,11 +59,11 @@ public final class DictionaryFactory {
		BinaryDictionaryGetter.getDictionaryFiles(locale, context);
		if (null != assetFileList) {
		for (final AssetFileAddress f : assetFileList) {
		final BinaryDictionary binaryDictionary = new BinaryDictionary(f.mFilename,
		f.mOffset, f.mLength, useFullEditDistance, locale, Dictionary.TYPE_MAIN,
		false /* isUpdatable */);
		if (binaryDictionary.isValidDictionary()) {
		dictList.add(binaryDictionary);
		final ReadOnlyBinaryDictionary readOnlyBinaryDictionary =
		new ReadOnlyBinaryDictionary(f.mFilename, f.mOffset, f.mLength,
		useFullEditDistance, locale, Dictionary.TYPE_MAIN);
		if (readOnlyBinaryDictionary.isValidDictionary()) {
		dictList.add(readOnlyBinaryDictionary);
		}
		}
		}
		@@ -89,12 +89,12 @@ public final class DictionaryFactory {
		}

		/**
		* Initializes a dictionary from a raw resource file
		* Initializes a read-only binary dictionary from a raw resource file
		* @param context application context for reading resources
		* @param locale the locale to use for the resource
		* @return an initialized instance of BinaryDictionary
		* @return an initialized instance of ReadOnlyBinaryDictionary
		*/
		protected static BinaryDictionary createBinaryDictionary(final Context context,
		protected static ReadOnlyBinaryDictionary createReadOnlyBinaryDictionary(final Context context,
		final Locale locale) {
		AssetFileDescriptor afd = null;
		try {
		@@ -113,9 +113,8 @@ public final class DictionaryFactory {
		Log.e(TAG, "sourceDir is not a file: " + sourceDir);
		return null;
		}
		return new BinaryDictionary(sourceDir, afd.getStartOffset(), afd.getLength(),
		false /* useFullEditDistance */, locale, Dictionary.TYPE_MAIN,
		false /* isUpdatable */);
		return new ReadOnlyBinaryDictionary(sourceDir, afd.getStartOffset(), afd.getLength(),
		false /* useFullEditDistance */, locale, Dictionary.TYPE_MAIN);
		} catch (android.content.res.Resources.NotFoundException e) {
		Log.e(TAG, "Could not find the resource");
		return null;
		@@ -142,10 +141,10 @@ public final class DictionaryFactory {
		final DictionaryCollection dictionaryCollection =
		new DictionaryCollection(Dictionary.TYPE_MAIN);
		for (final AssetFileAddress address : dictionaryList) {
		final BinaryDictionary binaryDictionary = new BinaryDictionary(address.mFilename,
		address.mOffset, address.mLength, useFullEditDistance, locale,
		Dictionary.TYPE_MAIN, false /* isUpdatable */);
		dictionaryCollection.addDictionary(binaryDictionary);
		final ReadOnlyBinaryDictionary readOnlyBinaryDictionary = new ReadOnlyBinaryDictionary(
		address.mFilename, address.mOffset, address.mLength, useFullEditDistance,
		locale, Dictionary.TYPE_MAIN);
		dictionaryCollection.addDictionary(readOnlyBinaryDictionary);
		}
		return dictionaryCollection;
		}

java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java

0 → 100644

+120 −0

Original line number	Diff line number	Diff line
		/*
		* 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;

		import com.android.inputmethod.keyboard.ProximityInfo;
		import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;

		import java.util.ArrayList;
		import java.util.Locale;
		import java.util.concurrent.locks.ReentrantReadWriteLock;

		/**
		* This class provides binary dictionary reading operations with locking. An instance of this class
		* can be used by multiple threads. Note that different session IDs must be used when multiple
		* threads get suggestions using this class.
		*/
		public final class ReadOnlyBinaryDictionary extends Dictionary {
		/**
		* A lock for accessing binary dictionary. Only closing binary dictionary is the operation
		* that change the state of dictionary.
		*/
		private final ReentrantReadWriteLock mLock = new ReentrantReadWriteLock();

		private final BinaryDictionary mBinaryDictionary;

		public ReadOnlyBinaryDictionary(final String filename, final long offset, final long length,
		final boolean useFullEditDistance, final Locale locale, final String dictType) {
		super(dictType);
		mBinaryDictionary = new BinaryDictionary(filename, offset, length, useFullEditDistance,
		locale, dictType, false /* isUpdatable */);
		}

		public boolean isValidDictionary() {
		return mBinaryDictionary.isValidDictionary();
		}

		@Override
		public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
		final String prevWord, final ProximityInfo proximityInfo,
		final boolean blockOffensiveWords, final int[] additionalFeaturesOptions) {
		return getSuggestionsWithSessionId(composer, prevWord, proximityInfo, blockOffensiveWords,
		additionalFeaturesOptions, 0 /* sessionId */);
		}

		@Override
		public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
		final String prevWord, final ProximityInfo proximityInfo,
		final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
		final int sessionId) {
		if (mLock.readLock().tryLock()) {
		try {
		return mBinaryDictionary.getSuggestions(composer, prevWord, proximityInfo,
		blockOffensiveWords, additionalFeaturesOptions);
		} finally {
		mLock.readLock().unlock();
		}
		}
		return null;
		}

		@Override
		public boolean isValidWord(final String word) {
		if (mLock.readLock().tryLock()) {
		try {
		return mBinaryDictionary.isValidWord(word);
		} finally {
		mLock.readLock().unlock();
		}
		}
		return false;
		}

		@Override
		public boolean shouldAutoCommit(final SuggestedWordInfo candidate) {
		if (mLock.readLock().tryLock()) {
		try {
		return mBinaryDictionary.shouldAutoCommit(candidate);
		} finally {
		mLock.readLock().unlock();
		}
		}
		return false;
		}

		@Override
		public int getFrequency(final String word) {
		if (mLock.readLock().tryLock()) {
		try {
		return mBinaryDictionary.getFrequency(word);
		} finally {
		mLock.readLock().unlock();
		}
		}
		return NOT_A_PROBABILITY;
		}

		@Override
		public void close() {
		mLock.writeLock().lock();
		try {
		mBinaryDictionary.close();
		} finally {
		mLock.writeLock().unlock();
		}
		}
		}