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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;
import com.android.inputmethod.latin.makedict.DictEncoder;
import com.android.inputmethod.latin.makedict.FormatSpec;
import com.android.inputmethod.latin.makedict.FusionDictionary;
import com.android.inputmethod.latin.makedict.FusionDictionary.PtNodeArray;
import com.android.inputmethod.latin.makedict.FusionDictionary.WeightedString;
import com.android.inputmethod.latin.makedict.ProbabilityInfo;
import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
import com.android.inputmethod.latin.utils.CollectionUtils;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/**
* An in memory dictionary for memorizing entries and writing a binary dictionary.
*/
public class DictionaryWriter extends AbstractDictionaryWriter {
private static final int BINARY_DICT_VERSION = FormatSpec.VERSION4;
private static final FormatSpec.FormatOptions FORMAT_OPTIONS =
new FormatSpec.FormatOptions(BINARY_DICT_VERSION, false /* hasTimestamp */);
private FusionDictionary mFusionDictionary;
public DictionaryWriter() {
clear();
}
@Override
public void clear() {
final HashMap<String, String> attributes = CollectionUtils.newHashMap();
mFusionDictionary = new FusionDictionary(new PtNodeArray(),
new FusionDictionary.DictionaryOptions(attributes));
}
/**
* Adds a word unigram to the fusion dictionary.
*/
// TODO: Create "cache dictionary" to cache fresh words for frequently updated dictionaries,
// considering performance regression.
@Override
public void addUnigramWord(final String word, final String shortcutTarget,
final int probability, final int shortcutProbability, final boolean isNotAWord) {
if (shortcutTarget == null) {
mFusionDictionary.add(word, new ProbabilityInfo(probability), null, isNotAWord);
} else {
// TODO: Do this in the subclass, with this class taking an arraylist.
final ArrayList<WeightedString> shortcutTargets = CollectionUtils.newArrayList();
shortcutTargets.add(new WeightedString(shortcutTarget, shortcutProbability));
mFusionDictionary.add(word, new ProbabilityInfo(probability), shortcutTargets,
isNotAWord);
}
}
@Override
public void addBigramWords(final String word0, final String word1, final int probability,
final boolean isValid, final long lastModifiedTime) {
mFusionDictionary.setBigram(word0, word1, new ProbabilityInfo(probability));
}
@Override
public void removeBigramWords(final String word0, final String word1) {
// This class don't support removing bigram words.
}
@Override
protected void writeDictionary(final DictEncoder dictEncoder,
final Map<String, String> attributeMap) throws IOException, UnsupportedFormatException {
for (final Map.Entry<String, String> entry : attributeMap.entrySet()) {
mFusionDictionary.addOptionAttribute(entry.getKey(), entry.getValue());
}
dictEncoder.writeDictionary(mFusionDictionary, FORMAT_OPTIONS);
}
}
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