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Java example source code file (DefaultModelSaver.java)

This example Java source code file (DefaultModelSaver.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

defaultmodelsaver, file, logger, override, saving, string

The DefaultModelSaver.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    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 org.deeplearning4j.scaleout.actor.core;

import java.io.File;
import java.io.Serializable;

import org.deeplearning4j.util.SerializationUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Saves a file to the relative path nn-model.bin
 * or another location specified by the user.
 * Renames the file to another file indicated by the timestamp
 * if this file already exists.
 * @author Adam Gibson
 *
 */
public class DefaultModelSaver implements ModelSaver {

	/**
	 * 
	 */
	private static final long serialVersionUID = -7563476748417989927L;
	private File file;
	private boolean rewrite = false;
    private static final Logger log = LoggerFactory.getLogger(DefaultModelSaver.class);

	public DefaultModelSaver(File file) {
		this(file,false);
	}



	public DefaultModelSaver(File file, boolean rewrite) {
		super();
		this.file = file;
		this.rewrite = rewrite;
	}



	public DefaultModelSaver() {
		super();
		file = new File("nn-model.bin");
	}



	@Override
	public void save(Serializable ser)  {
		if(!rewrite) {
			String path = file.getAbsolutePath();
			if(file.exists()) {
				file.renameTo(new File(file.getParentFile(),file.getName() + "-" + System.currentTimeMillis()));
			}

			file = new File(path);

		}
        log.info("Saving to " + file);

		SerializationUtils.saveObject(ser, file);


	}

    /**
     * Returns whether a model exists or not
     *
     * @return true if the model exists, false otherwise
     */
    @Override
    public boolean exists() {
       return file.exists();
    }

    /**
     * Loads the model from the location that it saves to
     */
    @Override
    public <E>  E load(Class clazz) {
        return SerializationUtils.readObject(file);
    }
}

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