opennlp.tools.ml.perceptron.BinaryPerceptronModelWriter Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 opennlp.tools.ml.perceptron;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;
import opennlp.tools.ml.model.AbstractModel;
import opennlp.tools.ml.model.ModelParameterChunker;
/**
* A {@link PerceptronModelWriter} that writes models in a binary format.
*/
public class BinaryPerceptronModelWriter extends PerceptronModelWriter {
private final DataOutputStream output;
/**
* Instantiates {@link BinaryPerceptronModelWriter} via an {@link AbstractModel perceptron model}
* and a {@link File}. Prepares writing of the {@code model} to the file.
* Based on whether the file's suffix contains {@code .gz}, it detects whether
* the file is gzipped or not.
*
* @param model The {@link AbstractModel perceptron model} which is to be persisted.
* @param f The {@link File} in which the model is to be persisted.
*
* @see PerceptronModel
*/
public BinaryPerceptronModelWriter(AbstractModel model, File f) throws IOException {
super(model);
if (f.getName().endsWith(".gz")) {
output = new DataOutputStream(
new GZIPOutputStream(new FileOutputStream(f)));
}
else {
output = new DataOutputStream(new FileOutputStream(f));
}
}
/**
* Instantiates {@link BinaryPerceptronModelWriter} via an {@link AbstractModel perceptron model}
* and a {@link DataOutputStream}. Prepares writing a {@code model} to the file.
* Based on whether the file's suffix contains {@code .gz}, it detects whether
* the file is gzipped or not.
*
* @param model The {@link AbstractModel perceptron model} which is to be persisted.
* @param dos The {@link DataOutputStream} which is used to persist the {@code model}.
* The {@code dos} must be opened.
*/
public BinaryPerceptronModelWriter(AbstractModel model, DataOutputStream dos) {
super(model);
output = dos;
}
@Override
public void writeUTF(String s) throws IOException {
ModelParameterChunker.writeUTF(output, s);
}
@Override
public void writeInt(int i) throws IOException {
output.writeInt(i);
}
@Override
public void writeDouble(double d) throws IOException {
output.writeDouble(d);
}
@Override
public void close() throws IOException {
output.flush();
output.close();
}
}