/interpreter/tags/at_build150307/src/edu/vub/at/actors/id/ATObjectID.java
Java | 114 lines | 47 code | 19 blank | 48 comment | 7 complexity | eb4fc0371376dbf560b20a6a584e073f MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * ATObjectID.java created on 21-dec-2006 at 12:04:03 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.id; 29 30 31import edu.vub.at.actors.natives.ELVirtualMachine; 32import edu.vub.at.exceptions.InterpreterException; 33import edu.vub.at.objects.natives.OBJLexicalRoot; 34 35import java.io.Serializable; 36 37/** 38 * An ATObjectID instance represents a globally unique identifier denoting 39 * an AmbientTalk/2 object. It is represented by a triplet: 40 * ( VM id, Host actor id, object id ) 41 * 42 * @author tvcutsem 43 */ 44public class ATObjectID implements Serializable { 45 46 private static final long serialVersionUID = -2108704271907943887L; 47 48 // Virtual Machines are identified by IP address + port 49 private final GUID virtualMachineId_; 50 51 // Inside a Virtual Machine actors (which accept the messages for this far object) 52 // are denoted by their hashcode 53 private final int actorId_; 54 55 // Inside an NATActorMirror, objects are denoted by their hashcode 56 private final int objectId_; 57 58 public ATObjectID(GUID vmId, int actorId, int objectId) { 59 virtualMachineId_ = vmId; 60 actorId_ = actorId; 61 objectId_ = objectId; 62 } 63 64 /* 65 * Three cases to consider: 66 * an object can be: 67 * - local to an actor (isFar -> false, isRemote -> false) 68 * - hosted by another local actor (isFar -> true, isRemote -> false) 69 * - hosted by a remote actor (isFar -> true, isRemote -> true) 70 */ 71 public boolean isFar() throws InterpreterException { 72 return (actorId_ != OBJLexicalRoot._INSTANCE_.base_getActor().hashCode()); 73 } 74 75 public boolean isRemote() { 76 return (!virtualMachineId_.equals(ELVirtualMachine.currentVM().getGUID())); 77 } 78 79 /* ----------------------- 80 * -- Structural Access -- 81 * ----------------------- */ 82 83 public int getActorId() { 84 return actorId_; 85 } 86 87 public int getObjectId() { 88 return objectId_; 89 } 90 91 public GUID getVirtualMachineId() { 92 return virtualMachineId_; 93 } 94 95 public int hashCode() { 96 return virtualMachineId_.hashCode() | actorId_ | objectId_; 97 } 98 99 public boolean equals(Object other) { 100 if (other instanceof ATObjectID) { 101 ATObjectID id = (ATObjectID) other; 102 return (id.getVirtualMachineId().equals(virtualMachineId_) 103 && (id.getActorId() == actorId_) 104 && (id.getObjectId() == objectId_)); 105 } else { 106 return false; 107 } 108 } 109 110 public String toString() { 111 return virtualMachineId_.toString() + ":" + actorId_ + ":" + objectId_; 112 } 113 114}