/interpreter/tags/at2dist170907/src/edu/vub/at/actors/natives/Packet.java
Java | 97 lines | 52 code | 11 blank | 34 comment | 0 complexity | 203be5c1ee6096a163fb9779ba1f6ff1 MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * Packet.java created on 29-dec-2006 at 19:15:00 4 * (c) Programming Technology Lab, 2006 - 2007 5 * Authors: Tom Van Cutsem & Stijn Mostinckx 6 * 7 * Permission is hereby granted, free of charge, to any person 8 * obtaining a copy of this software and associated documentation 9 * files (the "Software"), to deal in the Software without 10 * restriction, including without limitation the rights to use, 11 * copy, modify, merge, publish, distribute, sublicense, and/or 12 * sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following 14 * conditions: 15 * 16 * The above copyright notice and this permission notice shall be 17 * included in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 21 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 23 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 */ 28package edu.vub.at.actors.natives; 29 30import edu.vub.at.actors.net.SerializationException; 31import edu.vub.at.exceptions.InterpreterException; 32import edu.vub.at.exceptions.XClassNotFound; 33import edu.vub.at.exceptions.XIOProblem; 34import edu.vub.at.objects.ATObject; 35 36import java.io.ByteArrayInputStream; 37import java.io.ByteArrayOutputStream; 38import java.io.IOException; 39import java.io.ObjectInputStream; 40import java.io.ObjectOutputStream; 41import java.io.Serializable; 42 43/** 44 * Packet instances are the serialized representation of AmbientTalk messages or other objects. 45 * They are exchanged directly in between local actors and in a wrapped VMCommand object between 46 * remote actors. 47 * 48 * @author tvcutsem 49 */ 50public class Packet implements Serializable { 51 52 private final byte[] payload_; 53 private final String description_; 54 55 public Packet(String description, ATObject object) throws XIOProblem { 56 description_ = description; 57 try { 58 payload_ = serialize(object); 59 } catch (IOException e) { 60 throw new XIOProblem(e); 61 } 62 } 63 64 public Packet(ATObject object) throws XIOProblem { 65 this(object.toString(), object); 66 } 67 68 public ATObject unpack() throws InterpreterException { 69 try { 70 return (ATObject) deserialize(payload_); 71 } catch (SerializationException e) { 72 throw e.getWrappedException(); 73 } catch (IOException e) { 74 throw new XIOProblem(e); 75 } catch (ClassNotFoundException e) { 76 throw new XClassNotFound(e.getMessage(), e); 77 } 78 } 79 80 public String toString() { return "packet["+description_+"]"; } 81 82 private static byte[] serialize(Object o) throws IOException { 83 ByteArrayOutputStream out = new ByteArrayOutputStream(); 84 ObjectOutputStream stream = new ObjectOutputStream(out); 85 stream.writeObject(o); 86 stream.flush(); 87 stream.close(); 88 return out.toByteArray(); 89 } 90 91 private static Object deserialize(byte[] b) throws IOException, ClassNotFoundException { 92 ByteArrayInputStream in = new ByteArrayInputStream(b); 93 ObjectInputStream instream = new ObjectInputStream(in); 94 return instream.readObject(); 95 } 96 97}