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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 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<DynamicPredictionDictionaryBase> mPredictionDictionary;
public String mLocale;
public abstract void onDictionaryReady();
public abstract void onDictionaryClosed(Context context);
public void setPredictionDictionary(String locale, DynamicPredictionDictionaryBase dictionary) {
mPredictionDictionary = new WeakReference<DynamicPredictionDictionaryBase>(dictionary);
mLocale = locale;
}
protected DynamicPredictionDictionaryBase getPredictionDictionary() {
return mPredictionDictionary == null ? null : mPredictionDictionary.get();
}
private void unsetPredictionDictionary() {
final DynamicPredictionDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
return;
}
dictionary.unRegisterUpdateSession(this);
}
public void closeSession(Context context) {
unsetPredictionDictionary();
onDictionaryClosed(context);
}
public void addBigramToPersonalizationDictionary(String word0, String word1, boolean isValid,
int frequency) {
final DynamicPredictionDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
return;
}
dictionary.addToPersonalizationPredictionDictionary(word0, word1, isValid);
}
// Bulk import
public void addBigramsToPersonalizationDictionary(
final ArrayList<PersonalizationLanguageModelParam> lmParams) {
final DynamicPredictionDictionaryBase dictionary = getPredictionDictionary();
if (dictionary == null) {
return;
}
for (final PersonalizationLanguageModelParam lmParam : lmParams) {
dictionary.addToPersonalizationPredictionDictionary(
lmParam.mWord0, lmParam.mWord1, lmParam.mIsValid);
}
}
}
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