org.apache.carbondata.hadoop.util.ObjectSerializationUtil.java Source code

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Here is the source code for org.apache.carbondata.hadoop.util.ObjectSerializationUtil.java

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/*
 * 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.carbondata.hadoop.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import org.apache.carbondata.core.constants.CarbonCommonConstants;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * It provides methods to convert object to Base64 string and vice versa.
 */
public class ObjectSerializationUtil {

    private static final Log LOG = LogFactory.getLog(ObjectSerializationUtil.class);

    /**
     * Convert object to Base64 String
     *
     * @param obj Object to be serialized
     * @return serialized string
     * @throws IOException
     */
    public static String convertObjectToString(Object obj) throws IOException {
        ByteArrayOutputStream baos = null;
        GZIPOutputStream gos = null;
        ObjectOutputStream oos = null;

        try {
            baos = new ByteArrayOutputStream();
            gos = new GZIPOutputStream(baos);
            oos = new ObjectOutputStream(gos);
            oos.writeObject(obj);
        } finally {
            try {
                if (oos != null) {
                    oos.close();
                }
                if (gos != null) {
                    gos.close();
                }
                if (baos != null) {
                    baos.close();
                }
            } catch (IOException e) {
                LOG.error(e);
            }
        }

        return new String(Base64.encodeBase64(baos.toByteArray()), CarbonCommonConstants.DEFAULT_CHARSET);
    }

    /**
     * Converts Base64 string to object.
     *
     * @param objectString serialized object in string format
     * @return Object after convert string to object
     * @throws IOException
     */
    public static Object convertStringToObject(String objectString) throws IOException {
        if (objectString == null) {
            return null;
        }

        byte[] bytes = Base64.decodeBase64(objectString.getBytes(CarbonCommonConstants.DEFAULT_CHARSET));

        ByteArrayInputStream bais = null;
        GZIPInputStream gis = null;
        ObjectInputStream ois = null;

        try {
            bais = new ByteArrayInputStream(bytes);
            gis = new GZIPInputStream(bais);
            ois = new ObjectInputStream(gis);
            return ois.readObject();
        } catch (ClassNotFoundException e) {
            throw new IOException("Could not read object", e);
        } finally {
            try {
                if (ois != null) {
                    ois.close();
                }
                if (gis != null) {
                    gis.close();
                }
                if (bais != null) {
                    bais.close();
                }
            } catch (IOException e) {
                LOG.error(e);
            }
        }
    }
}