/*
* 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.pig.impl.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.input.ClassLoaderObjectInputStream;
public class ObjectSerializer {
public static String serialize(Serializable obj) throws IOException {
if (obj == null)
return "";
try {
ByteArrayOutputStream serialObj = new ByteArrayOutputStream();
Deflater def = new Deflater(Deflater.BEST_COMPRESSION);
ObjectOutputStream objStream = new ObjectOutputStream(new DeflaterOutputStream(
serialObj, def));
objStream.writeObject(obj);
objStream.close();
return encodeBytes(serialObj.toByteArray());
} catch (Exception e) {
throw new IOException("Serialization error: " + e.getMessage(), e);
}
}
public static Object deserialize(String str) throws IOException {
if (str == null || str.length() == 0)
return null;
ObjectInputStream objStream = null;
try {
ByteArrayInputStream serialObj = new ByteArrayInputStream(decodeBytes(str));
objStream = new ClassLoaderObjectInputStream(Thread.currentThread().getContextClassLoader(), new InflaterInputStream(serialObj));
return objStream.readObject();
} catch (Exception e) {
throw new IOException("Deserialization error: " + e.getMessage(), e);
} finally {
IOUtils.closeQuietly(objStream);
}
}
public static String encodeBytes(byte[] bytes) throws UnsupportedEncodingException {
return bytes == null ? null : new String(Base64.encodeBase64(bytes), Charset.forName("UTF-8"));
}
public static byte[] decodeBytes(String str) throws UnsupportedEncodingException {
return Base64.decodeBase64(str.getBytes(Charset.forName("UTF-8")));
}
}