/**
* Copyright 2010-2013 Atilika Inc. and contributors (see CONTRIBUTORS.md)
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. A copy of the
* License is distributed with this work in the LICENSE.md file. You may
* also obtain a copy of the License from
*
* 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.atilika.kuromoji.dict;
import com.atilika.kuromoji.ClassLoaderResolver;
import com.atilika.kuromoji.ResourceResolver;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ShortBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
public class ConnectionCosts {
public static final String FILENAME = "cc.dat";
private int dimension;
private ShortBuffer costs;
public ConnectionCosts(int forwardSize, int backwardSize) {
this.costs = ShortBuffer.allocate(backwardSize * forwardSize);
this.dimension = backwardSize;
}
public void add(short forwardId, short backwardId, short cost) {
this.costs.put(backwardId + forwardId * dimension, cost);
}
public int get(int forwardId, int backwardId) {
return costs.get(backwardId + forwardId * dimension);
}
public static ConnectionCosts newInstance(ResourceResolver resolver) throws IOException, ClassNotFoundException {
return read(resolver.resolve(FILENAME));
}
public static ConnectionCosts newInstance() throws IOException, ClassNotFoundException {
return newInstance(new ClassLoaderResolver(ConnectionCosts.class));
}
public void write(OutputStream stream) throws IOException {
DataOutputStream daos = new DataOutputStream(stream);
daos.writeShort(dimension);
daos.writeInt(costs.array().length * 2);
ByteBuffer outBuffer = ByteBuffer.allocate(costs.array().length * 2);
for (short s : costs.array()) {
outBuffer.putShort(s);
}
WritableByteChannel channel = Channels.newChannel(stream);
outBuffer.flip();
channel.write(outBuffer);
stream.close();
}
public static ConnectionCosts read(InputStream is) throws IOException, ClassNotFoundException {
BufferedInputStream bis = new BufferedInputStream(is);
DataInputStream dais = new DataInputStream(bis);
ConnectionCosts instance = new ConnectionCosts(0, 0);
instance.dimension = dais.readShort();
int size = dais.readInt();
ByteBuffer tmpBuffer = ByteBuffer.allocate(size);
ReadableByteChannel channel = Channels.newChannel(bis);
channel.read(tmpBuffer);
dais.close();
tmpBuffer.rewind();
instance.costs = tmpBuffer.asShortBuffer();
return instance;
}
}