/**
* 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 org.apache.mahout.classifier.sgd;
import com.google.common.io.Closeables;
import org.apache.hadoop.io.Writable;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Provides the ability to store SGD model-related objects as binary files.
*/
public final class ModelSerializer {
// static class ... don't instantiate
private ModelSerializer() {
}
public static void writeBinary(String path, CrossFoldLearner model) throws IOException {
DataOutputStream out = new DataOutputStream(new FileOutputStream(path));
try {
PolymorphicWritable.write(out, model);
} finally {
Closeables.closeQuietly(out);
}
}
public static void writeBinary(String path, OnlineLogisticRegression model) throws IOException {
DataOutputStream out = new DataOutputStream(new FileOutputStream(path));
try {
PolymorphicWritable.write(out, model);
} finally {
Closeables.closeQuietly(out);
}
}
public static void writeBinary(String path, AdaptiveLogisticRegression model) throws IOException {
DataOutputStream out = new DataOutputStream(new FileOutputStream(path));
try {
PolymorphicWritable.write(out, model);
} finally {
Closeables.closeQuietly(out);
}
}
public static <T extends Writable> T readBinary(InputStream in, Class<T> clazz) throws IOException {
DataInput dataIn = new DataInputStream(in);
try {
return PolymorphicWritable.read(dataIn, clazz);
} finally {
Closeables.closeQuietly(in);
}
}
}