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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.makedict;
import com.android.inputmethod.annotations.UsedForTesting;
import com.android.inputmethod.latin.makedict.FusionDictionary.WeightedString;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
/**
* An implementation of DictUpdater for version 3 binary dictionary.
*/
@UsedForTesting
public class Ver3DictUpdater extends Ver3DictDecoder implements DictUpdater {
private OutputStream mOutStream;
@UsedForTesting
public Ver3DictUpdater(final File dictFile, final int factoryType) {
// DictUpdater must have an updatable DictBuffer.
super(dictFile, ((factoryType & MASK_DICTBUFFER) == USE_BYTEARRAY)
? USE_BYTEARRAY : USE_WRITABLE_BYTEBUFFER);
mOutStream = null;
}
private void openStreamAndBuffer() throws FileNotFoundException, IOException {
super.openDictBuffer();
mOutStream = new FileOutputStream(mDictionaryBinaryFile, true /* append */);
}
private void close() throws IOException {
if (mOutStream != null) {
mOutStream.close();
mOutStream = null;
}
}
@Override @UsedForTesting
public void deleteWord(final String word) throws IOException, UnsupportedFormatException {
if (mOutStream == null) openStreamAndBuffer();
mDictBuffer.position(0);
super.readHeader();
final int wordPos = getTerminalPosition(word);
if (wordPos != FormatSpec.NOT_VALID_WORD) {
mDictBuffer.position(wordPos);
final int flags = mDictBuffer.readUnsignedByte();
mDictBuffer.position(wordPos);
mDictBuffer.put((byte) DynamicBinaryDictIOUtils.markAsDeleted(flags));
}
close();
}
@Override @UsedForTesting
public void insertWord(final String word, final int frequency,
final ArrayList<WeightedString> bigramStrings,
final ArrayList<WeightedString> shortcuts,
final boolean isNotAWord, final boolean isBlackListEntry)
throws IOException, UnsupportedFormatException {
if (mOutStream == null) openStreamAndBuffer();
DynamicBinaryDictIOUtils.insertWord(this, mOutStream, word, frequency, bigramStrings,
shortcuts, isNotAWord, isBlackListEntry);
close();
}
}
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