org.openhie.openempi.util.SerializationUtil.java Source code

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Here is the source code for org.openhie.openempi.util.SerializationUtil.java

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/**
 * 
 *  Copyright (C) 2013 Vanderbilt University <csaba.toth, b.malin @vanderbilt.edu>
 *
 *  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.openhie.openempi.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Utility class for serialization.
 * 
 * @author <a href="mailto:csaba.toth@vanderbilt.edu">Csaba Toth</a>
 */
public final class SerializationUtil {
    private static final Log log = LogFactory.getLog(SerializationUtil.class);

    /**
     * Checkstyle rule: utility classes should not have public constructor
     */
    private SerializationUtil() {
    }

    public static void serializeObject(String configDirectory, String fileName, Object o) {
        String fullFilename = configDirectory + "/" + fileName;
        log.debug("Attempting to serialize object into file: " + fullFilename);
        try {
            ObjectOutputStream ois = new ObjectOutputStream(
                    new BufferedOutputStream(new FileOutputStream(fullFilename)));
            ois.writeObject(o);
            ois.flush();
            ois.close();
        } catch (Exception e) {
            log.error("Failed while serializing object (into the file" + fullFilename + " ): " + e.getMessage(), e);
            throw new RuntimeException(
                    "Failed while serializing object (into the file" + fullFilename + " ): " + e.getMessage());
        }
    }

    public static Object deserializeObject(String configDirectory, String fileName) {
        String fullFilename = configDirectory + "/" + fileName;
        return deserializeObject(fullFilename);
    }

    public static Object deserializeObject(String fullFilename) {
        Object obj;
        log.debug("Attempting to deserialize object from file: " + fullFilename);
        try {
            ObjectInputStream ois = new ObjectInputStream(
                    new BufferedInputStream(new FileInputStream(fullFilename)));
            obj = ois.readObject();
            ois.close();
        } catch (Exception e) {
            log.error("Failed while deserializing object (from file " + fullFilename + "): " + e.getMessage(), e);
            throw new RuntimeException(
                    "Failed while deserializing object (from file " + fullFilename + "): " + e.getMessage());
        }
        return obj;
    }

    public static byte[] serializeObject(Object o) {
        log.debug("Attempting to serialize object into memory");
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        try {
            ObjectOutputStream ois = new ObjectOutputStream(new BufferedOutputStream(byteArrayOutputStream));
            ois.writeObject(o);
            ois.flush();
            ois.close();
        } catch (Exception e) {
            log.error("Failed while serializing matchConfiguration (into memory): " + e.getMessage(), e);
            throw new RuntimeException("Failed while serializing object (into memory): " + e.getMessage());
        }
        return byteArrayOutputStream.toByteArray();
    }

    public static Object deserializeObject(byte[] o) {
        Object obj;
        log.debug("Attempting to deserialize object from memory");
        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(o);
        try {
            ObjectInputStream ois = new ObjectInputStream(new BufferedInputStream(byteArrayInputStream));
            obj = ois.readObject();
            ois.close();
        } catch (Exception e) {
            log.error("Failed while deserializing object (from memory): " + e.getMessage(), e);
            throw new RuntimeException("Failed while deserializing object (from memory): " + e.getMessage());
        }
        return obj;
    }

}