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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.Dictionary;
import com.android.inputmethod.latin.ExpandableBinaryDictionary;
import com.android.inputmethod.latin.makedict.DictionaryHeader;
import java.io.File;
import java.util.Locale;
import java.util.Map;
/**
* This class is a base class of a dictionary that supports decaying for the personalized language
* model.
*/
public abstract class DecayingExpandableBinaryDictionaryBase extends ExpandableBinaryDictionary {
private static final boolean DBG_DUMP_ON_CLOSE = false;
/** Any pair being typed or picked */
public static final int FREQUENCY_FOR_TYPED = 2;
public static final int FREQUENCY_FOR_WORDS_IN_DICTS = FREQUENCY_FOR_TYPED;
public static final int FREQUENCY_FOR_WORDS_NOT_IN_DICTS = Dictionary.NOT_A_PROBABILITY;
/** The locale for this dictionary. */
public final Locale mLocale;
protected DecayingExpandableBinaryDictionaryBase(final Context context,
final String dictName, final Locale locale, final String dictionaryType,
final File dictFile) {
super(context, dictName, locale, dictionaryType, dictFile);
mLocale = locale;
if (mLocale != null && mLocale.toString().length() > 1) {
reloadDictionaryIfRequired();
}
}
@Override
public void close() {
if (DBG_DUMP_ON_CLOSE) {
dumpAllWordsForDebug();
}
// Flush pending writes.
asyncFlushBinaryDictionary();
super.close();
}
@Override
protected Map<String, String> getHeaderAttributeMap() {
final Map<String, String> attributeMap = super.getHeaderAttributeMap();
attributeMap.put(DictionaryHeader.USES_FORGETTING_CURVE_KEY,
DictionaryHeader.ATTRIBUTE_VALUE_TRUE);
attributeMap.put(DictionaryHeader.HAS_HISTORICAL_INFO_KEY,
DictionaryHeader.ATTRIBUTE_VALUE_TRUE);
return attributeMap;
}
@Override
protected void loadInitialContentsLocked() {
// No initial contents.
}
/* package */ void runGCIfRequired() {
runGCIfRequired(false /* mindsBlockByGC */);
}
@Override
public boolean isValidWord(final String word) {
// Strings out of this dictionary should not be considered existing words.
return false;
}
}
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