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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 android.content.Context;
import com.android.inputmethod.latin.ExpandableBinaryDictionary;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
/**
* This class is a session where a data provider can communicate with a personalization
* dictionary.
*/
public abstract class PersonalizationDictionaryUpdateSession {
/**
* This class is a parameter for a new unigram or bigram word which will be added
* to the personalization dictionary.
*/
public static class PersonalizationLanguageModelParam {
public final String mWord0;
public final String mWord1;
public final boolean mIsValid;
public final int mFrequency;
public PersonalizationLanguageModelParam(String word0, String word1, boolean isValid,
int frequency) {
mWord0 = word0;
mWord1 = word1;
mIsValid = isValid;
mFrequency = frequency;
}
}
// TODO: Use a dynamic binary dictionary instead
public WeakReference<PersonalizationDictionary> mDictionary;
public WeakReference<DecayingExpandableBinaryDictionaryBase> mPredictionDictionary;
public final String mSystemLocale;
public PersonalizationDictionaryUpdateSession(String locale) {
mSystemLocale = locale;
}
public abstract void onDictionaryReady();
public abstract void onDictionaryClosed(Context context);
public void setDictionary(PersonalizationDictionary dictionary) {
mDictionary = new WeakReference<PersonalizationDictionary>(dictionary);
}
public void setPredictionDictionary(DecayingExpandableBinaryDictionaryBase dictionary) {
mPredictionDictionary =
new WeakReference<DecayingExpandableBinaryDictionaryBase>(dictionary);
}
protected PersonalizationDictionary getDictionary() {
return mDictionary == null ? null : mDictionary.get();
}
protected DecayingExpandableBinaryDictionaryBase getPredictionDictionary() {
return mPredictionDictionary == null ? null : mPredictionDictionary.get();
}
private void unsetDictionary() {
final PersonalizationDictionary dictionary = getDictionary();
if (dictionary == null) {
return;
}
dictionary.unRegisterUpdateSession(this);
}
private void unsetPredictionDictionary() {
final DecayingExpandableBinaryDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
return;
}
dictionary.unRegisterUpdateSession(this);
}
public void clearAndFlushPredictionDictionary(Context context) {
final DecayingExpandableBinaryDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
return;
}
dictionary.clearAndFlushDictionary();
}
public void closeSession(Context context) {
unsetDictionary();
unsetPredictionDictionary();
onDictionaryClosed(context);
}
// TODO: Support multi locale to add bigram
public void addBigramToPersonalizationDictionary(String word0, String word1, boolean isValid,
int frequency) {
final DecayingExpandableBinaryDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
return;
}
dictionary.addToDictionary(word0, word1, isValid);
}
// TODO: Support multi locale.
public void addMultipleDictionaryEntriesToPersonalizationDictionary(
final ArrayList<ExpandableBinaryDictionary.LanguageModelParam> languageModelParams,
final ExpandableBinaryDictionary.AddMultipleDictionaryEntriesCallback callback) {
final DecayingExpandableBinaryDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
if (callback != null) {
callback.onFinished();
}
return;
}
dictionary.addMultipleDictionaryEntriesToDictionary(languageModelParams, callback);
}
// Bulk import
// TODO: Support multi locale to add bigram
public void addBigramsToPersonalizationDictionary(
final ArrayList<PersonalizationLanguageModelParam> lmParams) {
final DecayingExpandableBinaryDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
return;
}
for (final PersonalizationLanguageModelParam lmParam : lmParams) {
dictionary.addToDictionary(lmParam.mWord0, lmParam.mWord1, lmParam.mIsValid);
}
}
}
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