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Add DictDecoder. 

Change-Id: Ia1c32f21fe07081ce04d093660e18146b93275a4
main
Yuichiro Hanada 2013-08-20 15:52:02 +09:00
parent 112257e40f
commit 065aad9501
5 changed files with 143 additions and 113 deletions
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2
java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
View File

@ -546,7 +546,7 @@ public final class BinaryDictIOUtils {
throws FileNotFoundException, IOException, UnsupportedFormatException {
final byte[] buffer = new byte[HEADER_READING_BUFFER_SIZE];
final Ver3DictDecoder dictDecoder = new Ver3DictDecoder(file);
dictDecoder.openDictBuffer(new Ver3DictDecoder.DictionaryBufferFactory() {
dictDecoder.openDictBuffer(new DictDecoder.DictionaryBufferFactory() {
@Override
public DictBuffer getDictionaryBuffer(File file)
throws FileNotFoundException, IOException {

127
java/src/com/android/inputmethod/latin/makedict/DictDecoder.java Normal file
View File

@ -0,0 +1,127 @@
/*
* 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.BinaryDictDecoderUtils.DictBuffer;
import com.android.inputmethod.latin.makedict.FormatSpec.FileHeader;
import com.android.inputmethod.latin.utils.ByteArrayDictBuffer;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
/**
* An interface of binary dictionary decoder.
*/
public interface DictDecoder {
public FileHeader readHeader() throws IOException, UnsupportedFormatException;
public interface DictionaryBufferFactory {
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException;
}
/**
* Creates DictionaryBuffer using a ByteBuffer
*
* This class uses less memory than DictionaryBufferFromByteArrayFactory,
* but doesn't perform as fast.
* When operating on a big dictionary, this class is preferred.
*/
public static final class DictionaryBufferFromReadOnlyByteBufferFactory
implements DictionaryBufferFactory {
@Override
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException {
FileInputStream inStream = null;
ByteBuffer buffer = null;
try {
inStream = new FileInputStream(file);
buffer = inStream.getChannel().map(FileChannel.MapMode.READ_ONLY,
0, file.length());
} finally {
if (inStream != null) {
inStream.close();
}
}
if (buffer != null) {
return new BinaryDictDecoderUtils.ByteBufferDictBuffer(buffer);
}
return null;
}
}
/**
* Creates DictionaryBuffer using a byte array
*
* This class performs faster than other classes, but consumes more memory.
* When operating on a small dictionary, this class is preferred.
*/
public static final class DictionaryBufferFromByteArrayFactory
implements DictionaryBufferFactory {
@Override
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException {
FileInputStream inStream = null;
try {
inStream = new FileInputStream(file);
final byte[] array = new byte[(int) file.length()];
inStream.read(array);
return new ByteArrayDictBuffer(array);
} finally {
if (inStream != null) {
inStream.close();
}
}
}
}
/**
* Creates DictionaryBuffer using a writable ByteBuffer and a RandomAccessFile.
*
* This class doesn't perform as fast as other classes,
* but this class is the only option available for destructive operations (insert or delete)
* on a dictionary.
*/
@UsedForTesting
public static final class DictionaryBufferFromWritableByteBufferFactory
implements DictionaryBufferFactory {
@Override
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException {
RandomAccessFile raFile = null;
ByteBuffer buffer = null;
try {
raFile = new RandomAccessFile(file, "rw");
buffer = raFile.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, file.length());
} finally {
if (raFile != null) {
raFile.close();
}
}
if (buffer != null) {
return new BinaryDictDecoderUtils.ByteBufferDictBuffer(buffer);
}
return null;
}
}
}

108
java/src/com/android/inputmethod/latin/makedict/Ver3DictDecoder.java
View File

@ -21,21 +21,18 @@ import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.CharEncodin
import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer;
import com.android.inputmethod.latin.makedict.FormatSpec.FileHeader;
import com.android.inputmethod.latin.makedict.FormatSpec.FormatOptions;
import com.android.inputmethod.latin.utils.ByteArrayDictBuffer;
import com.android.inputmethod.latin.utils.JniUtils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.HashMap;
// TODO: Make an interface "DictDecoder".
/**
* An implementation of DictDecoder for version 3 binary dictionary.
*/
@UsedForTesting
public class Ver3DictDecoder {
public class Ver3DictDecoder implements DictDecoder {
static {
JniUtils.loadNativeLibrary();
@ -44,96 +41,6 @@ public class Ver3DictDecoder {
// TODO: implement something sensical instead of just a phony method
private static native int doNothing();
public interface DictionaryBufferFactory {
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException;
}
/**
* Creates DictionaryBuffer using a ByteBuffer
*
* This class uses less memory than DictionaryBufferFromByteArrayFactory,
* but doesn't perform as fast.
* When operating on a big dictionary, this class is preferred.
*/
public static final class DictionaryBufferFromReadOnlyByteBufferFactory
implements DictionaryBufferFactory {
@Override
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException {
FileInputStream inStream = null;
ByteBuffer buffer = null;
try {
inStream = new FileInputStream(file);
buffer = inStream.getChannel().map(FileChannel.MapMode.READ_ONLY,
0, file.length());
} finally {
if (inStream != null) {
inStream.close();
}
}
if (buffer != null) {
return new BinaryDictDecoderUtils.ByteBufferDictBuffer(buffer);
}
return null;
}
}
/**
* Creates DictionaryBuffer using a byte array
*
* This class performs faster than other classes, but consumes more memory.
* When operating on a small dictionary, this class is preferred.
*/
public static final class DictionaryBufferFromByteArrayFactory
implements DictionaryBufferFactory {
@Override
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException {
FileInputStream inStream = null;
try {
inStream = new FileInputStream(file);
final byte[] array = new byte[(int) file.length()];
inStream.read(array);
return new ByteArrayDictBuffer(array);
} finally {
if (inStream != null) {
inStream.close();
}
}
}
}
/**
* Creates DictionaryBuffer using a writable ByteBuffer and a RandomAccessFile.
*
* This class doesn't perform as fast as other classes,
* but this class is the only option available for destructive operations (insert or delete)
* on a dictionary.
*/
@UsedForTesting
public static final class DictionaryBufferFromWritableByteBufferFactory
implements DictionaryBufferFactory {
@Override
public DictBuffer getDictionaryBuffer(final File file)
throws FileNotFoundException, IOException {
RandomAccessFile raFile = null;
ByteBuffer buffer = null;
try {
raFile = new RandomAccessFile(file, "rw");
buffer = raFile.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, file.length());
} finally {
if (raFile != null) {
raFile.close();
}
}
if (buffer != null) {
return new BinaryDictDecoderUtils.ByteBufferDictBuffer(buffer);
}
return null;
}
}
private final static class HeaderReader {
protected static int readVersion(final DictBuffer dictBuffer)
throws IOException, UnsupportedFormatException {
@ -171,7 +78,7 @@ public class Ver3DictDecoder {
mDictBuffer = null;
}
public void openDictBuffer(final DictionaryBufferFactory factory)
public void openDictBuffer(final DictDecoder.DictionaryBufferFactory factory)
throws FileNotFoundException, IOException {
mDictBuffer = factory.getDictionaryBuffer(mDictionaryBinaryFile);
}
@ -181,14 +88,13 @@ public class Ver3DictDecoder {
}
@UsedForTesting
public DictBuffer openAndGetDictBuffer(
final DictionaryBufferFactory factory)
public DictBuffer openAndGetDictBuffer(final DictDecoder.DictionaryBufferFactory factory)
throws FileNotFoundException, IOException {
openDictBuffer(factory);
return getDictBuffer();
}
// TODO : Define public functions of decoders
@Override
public FileHeader readHeader() throws IOException, UnsupportedFormatException {
final int version = HeaderReader.readVersion(mDictBuffer);
final int optionsFlags = HeaderReader.readOptionFlags(mDictBuffer);

4
tests/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtilsTests.java
View File

@ -22,12 +22,12 @@ import android.test.suitebuilder.annotation.LargeTest;
import android.util.Log;
import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer;
import com.android.inputmethod.latin.makedict.DictDecoder.
DictionaryBufferFromWritableByteBufferFactory;
import com.android.inputmethod.latin.makedict.FormatSpec.FileHeader;
import com.android.inputmethod.latin.makedict.FusionDictionary.PtNodeArray;
import com.android.inputmethod.latin.makedict.FusionDictionary.WeightedString;
import com.android.inputmethod.latin.utils.CollectionUtils;
import com.android.inputmethod.latin.makedict.Ver3DictDecoder.
DictionaryBufferFromWritableByteBufferFactory;
import java.io.BufferedOutputStream;
import java.io.File;

15
tests/src/com/android/inputmethod/latin/makedict/Ver3DictDecoderTests.java
View File

@ -17,12 +17,11 @@
package com.android.inputmethod.latin.makedict;
import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer;
import com.android.inputmethod.latin.makedict.Ver3DictDecoder.DictionaryBufferFactory;
import com.android.inputmethod.latin.makedict.Ver3DictDecoder.
DictionaryBufferFromByteArrayFactory;
import com.android.inputmethod.latin.makedict.Ver3DictDecoder.
import com.android.inputmethod.latin.makedict.DictDecoder.DictionaryBufferFactory;
import com.android.inputmethod.latin.makedict.DictDecoder.DictionaryBufferFromByteArrayFactory;
import com.android.inputmethod.latin.makedict.DictDecoder.
DictionaryBufferFromReadOnlyByteBufferFactory;
import com.android.inputmethod.latin.makedict.Ver3DictDecoder.
import com.android.inputmethod.latin.makedict.DictDecoder.
DictionaryBufferFromWritableByteBufferFactory;
import android.test.AndroidTestCase;
@ -60,8 +59,7 @@ public class Ver3DictDecoderTests extends AndroidTestCase {
}
@SuppressWarnings("null")
public void runTestOpenBuffer(final String testName,
final DictionaryBufferFactory factory) {
public void runTestOpenBuffer(final String testName, final DictionaryBufferFactory factory) {
File testFile = null;
try {
testFile = File.createTempFile(testName, ".tmp", getContext().getCacheDir());
@ -104,8 +102,7 @@ public class Ver3DictDecoderTests extends AndroidTestCase {
}
@SuppressWarnings("null")
public void runTestGetBuffer(final String testName,
final DictionaryBufferFactory factory) {
public void runTestGetBuffer(final String testName, final DictionaryBufferFactory factory) {
File testFile = null;
try {
testFile = File.createTempFile(testName, ".tmp", getContext().getCacheDir());