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/*
* Copyright (C) 2011 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 org.kelar.inputmethod.latin;
import android.util.Log;
import org.kelar.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
import org.kelar.inputmethod.latin.common.ComposedData;
import org.kelar.inputmethod.latin.settings.SettingsValuesForSuggestion;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Locale;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* Class for a collection of dictionaries that behave like one dictionary.
*/
public final class DictionaryCollection extends Dictionary {
private final String TAG = DictionaryCollection.class.getSimpleName();
protected final CopyOnWriteArrayList<Dictionary> mDictionaries;
public DictionaryCollection(final String dictType, final Locale locale) {
super(dictType, locale);
mDictionaries = new CopyOnWriteArrayList<>();
}
public DictionaryCollection(final String dictType, final Locale locale,
final Dictionary... dictionaries) {
super(dictType, locale);
if (null == dictionaries) {
mDictionaries = new CopyOnWriteArrayList<>();
} else {
mDictionaries = new CopyOnWriteArrayList<>(dictionaries);
mDictionaries.removeAll(Collections.singleton(null));
}
}
public DictionaryCollection(final String dictType, final Locale locale,
final Collection<Dictionary> dictionaries) {
super(dictType, locale);
mDictionaries = new CopyOnWriteArrayList<>(dictionaries);
mDictionaries.removeAll(Collections.singleton(null));
}
@Override
public ArrayList<SuggestedWordInfo> getSuggestions(final ComposedData composedData,
final NgramContext ngramContext, final long proximityInfoHandle,
final SettingsValuesForSuggestion settingsValuesForSuggestion,
final int sessionId, final float weightForLocale,
final float[] inOutWeightOfLangModelVsSpatialModel) {
final CopyOnWriteArrayList<Dictionary> dictionaries = mDictionaries;
if (dictionaries.isEmpty()) return null;
// To avoid creating unnecessary objects, we get the list out of the first
// dictionary and add the rest to it if not null, hence the get(0)
ArrayList<SuggestedWordInfo> suggestions = dictionaries.get(0).getSuggestions(composedData,
ngramContext, proximityInfoHandle, settingsValuesForSuggestion, sessionId,
weightForLocale, inOutWeightOfLangModelVsSpatialModel);
if (null == suggestions) suggestions = new ArrayList<>();
final int length = dictionaries.size();
for (int i = 1; i < length; ++ i) {
final ArrayList<SuggestedWordInfo> sugg = dictionaries.get(i).getSuggestions(
composedData, ngramContext, proximityInfoHandle, settingsValuesForSuggestion,
sessionId, weightForLocale, inOutWeightOfLangModelVsSpatialModel);
if (null != sugg) suggestions.addAll(sugg);
}
return suggestions;
}
@Override
public boolean isInDictionary(final String word) {
for (int i = mDictionaries.size() - 1; i >= 0; --i)
if (mDictionaries.get(i).isInDictionary(word)) return true;
return false;
}
@Override
public int getFrequency(final String word) {
int maxFreq = -1;
for (int i = mDictionaries.size() - 1; i >= 0; --i) {
final int tempFreq = mDictionaries.get(i).getFrequency(word);
maxFreq = Math.max(tempFreq, maxFreq);
}
return maxFreq;
}
@Override
public int getMaxFrequencyOfExactMatches(final String word) {
int maxFreq = -1;
for (int i = mDictionaries.size() - 1; i >= 0; --i) {
final int tempFreq = mDictionaries.get(i).getMaxFrequencyOfExactMatches(word);
maxFreq = Math.max(tempFreq, maxFreq);
}
return maxFreq;
}
@Override
public boolean isInitialized() {
return !mDictionaries.isEmpty();
}
@Override
public void close() {
for (final Dictionary dict : mDictionaries)
dict.close();
}
// Warning: this is not thread-safe. Take necessary precaution when calling.
public void addDictionary(final Dictionary newDict) {
if (null == newDict) return;
if (mDictionaries.contains(newDict)) {
Log.w(TAG, "This collection already contains this dictionary: " + newDict);
}
mDictionaries.add(newDict);
}
// Warning: this is not thread-safe. Take necessary precaution when calling.
public void removeDictionary(final Dictionary dict) {
if (mDictionaries.contains(dict)) {
mDictionaries.remove(dict);
} else {
Log.w(TAG, "This collection does not contain this dictionary: " + dict);
}
}
}
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