| /* |
| * 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"))); |
| } |
| } |