| /** |
| * 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.apex.malhar.lib.codec; |
| |
| 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 com.datatorrent.api.StreamCodec; |
| import com.datatorrent.netlet.util.Slice; |
| |
| /** |
| * This codec is used for serializing the objects of class which implements |
| * java.io.Serializable. It's not optimized for speed and should be used as the |
| * last resort if you know that the slowness of it is not going to prevent you |
| * from operating your application in realtime. |
| * |
| * @param <T> |
| * Type of the object which gets serialized/deserialized using this |
| * codec. |
| * @since 0.3.3 |
| */ |
| public class JavaSerializationStreamCodec<T extends Serializable> implements StreamCodec<T>, Serializable |
| { |
| @Override |
| public Object fromByteArray(Slice fragment) |
| { |
| ByteArrayInputStream bis = new ByteArrayInputStream(fragment.buffer, |
| fragment.offset, fragment.length); |
| try { |
| ObjectInputStream ois = new ObjectInputStream(bis); |
| return ois.readObject(); |
| } catch (Exception ioe) { |
| throw new RuntimeException(ioe); |
| } |
| } |
| |
| @Override |
| public Slice toByteArray(T object) |
| { |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| try { |
| ObjectOutputStream oos = new ObjectOutputStream(bos); |
| oos.writeObject(object); |
| oos.flush(); |
| byte[] buffer = bos.toByteArray(); |
| return new Slice(buffer, 0, buffer.length); |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| @Override |
| public int getPartition(T o) |
| { |
| return o.hashCode(); |
| } |
| } |