105 lines
4.1 KiB
Java
105 lines
4.1 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.latin.makedict;
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import com.android.inputmethod.annotations.UsedForTesting;
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import com.android.inputmethod.latin.BinaryDictionary;
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import com.android.inputmethod.latin.common.FileUtils;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.util.ArrayList;
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/**
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* An implementation of binary dictionary decoder for version 4 binary dictionary.
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*/
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@UsedForTesting
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public class Ver4DictDecoder extends AbstractDictDecoder {
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final File mDictDirectory;
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@UsedForTesting
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/* package */ Ver4DictDecoder(final File dictDirectory) {
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mDictDirectory = dictDirectory;
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}
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@Override
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public DictionaryHeader readHeader() throws IOException, UnsupportedFormatException {
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// dictType is not being used in dicttool. Passing an empty string.
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final BinaryDictionary binaryDictionary= new BinaryDictionary(
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mDictDirectory.getAbsolutePath(), 0 /* offset */, 0 /* length */,
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true /* useFullEditDistance */, null /* locale */,
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"" /* dictType */, true /* isUpdatable */);
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final DictionaryHeader header = binaryDictionary.getHeader();
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binaryDictionary.close();
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if (header == null) {
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throw new IOException("Cannot read the dictionary header.");
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}
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return header;
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}
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@Override
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public FusionDictionary readDictionaryBinary(final boolean deleteDictIfBroken)
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throws FileNotFoundException, IOException, UnsupportedFormatException {
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// dictType is not being used in dicttool. Passing an empty string.
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final BinaryDictionary binaryDictionary = new BinaryDictionary(
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mDictDirectory.getAbsolutePath(), 0 /* offset */, 0 /* length */,
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true /* useFullEditDistance */, null /* locale */,
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"" /* dictType */, true /* isUpdatable */);
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final DictionaryHeader header = readHeader();
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final FusionDictionary fusionDict =
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new FusionDictionary(new FusionDictionary.PtNodeArray(), header.mDictionaryOptions);
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int token = 0;
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final ArrayList<WordProperty> wordProperties = new ArrayList<>();
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do {
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final BinaryDictionary.GetNextWordPropertyResult result =
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binaryDictionary.getNextWordProperty(token);
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final WordProperty wordProperty = result.mWordProperty;
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if (wordProperty == null) {
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binaryDictionary.close();
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if (deleteDictIfBroken) {
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FileUtils.deleteRecursively(mDictDirectory);
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}
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return null;
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}
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wordProperties.add(wordProperty);
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token = result.mNextToken;
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} while (token != 0);
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// Insert unigrams into the fusion dictionary.
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for (final WordProperty wordProperty : wordProperties) {
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fusionDict.add(wordProperty.mWord, wordProperty.mProbabilityInfo,
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wordProperty.mIsNotAWord,
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wordProperty.mIsPossiblyOffensive);
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}
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// Insert bigrams into the fusion dictionary.
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// TODO: Support ngrams.
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for (final WordProperty wordProperty : wordProperties) {
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if (!wordProperty.mHasNgrams) {
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continue;
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}
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final String word0 = wordProperty.mWord;
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for (final WeightedString bigram : wordProperty.getBigrams()) {
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fusionDict.setBigram(word0, bigram.mWord, bigram.mProbabilityInfo);
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}
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}
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binaryDictionary.close();
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return fusionDict;
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}
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}
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