J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package sun.rmi.transport; |
| 26 | |
| 27 | import java.rmi.server.ObjID; |
| 28 | |
| 29 | /** |
| 30 | * An object used as a key to the object table that maps an |
| 31 | * instance of this class to a Target. |
| 32 | * |
| 33 | * @author Ann Wollrath |
| 34 | **/ |
| 35 | class ObjectEndpoint { |
| 36 | |
| 37 | private final ObjID id; |
| 38 | private final Transport transport; |
| 39 | |
| 40 | /** |
| 41 | * Constructs a new ObjectEndpoint instance with the specified id and |
| 42 | * transport. The specified id must be non-null, and the specified |
| 43 | * transport must either be non-null or the specified id must be |
| 44 | * equivalent to an ObjID constructed with ObjID.DGC_ID. |
| 45 | * |
| 46 | * @param id the object identifier |
| 47 | * @param transport the transport |
| 48 | * @throws NullPointerException if id is null |
| 49 | **/ |
| 50 | ObjectEndpoint(ObjID id, Transport transport) { |
| 51 | if (id == null) { |
| 52 | throw new NullPointerException(); |
| 53 | } |
| 54 | assert transport != null || id.equals(new ObjID(ObjID.DGC_ID)); |
| 55 | |
| 56 | this.id = id; |
| 57 | this.transport = transport; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Compares the specified object with this object endpoint for |
| 62 | * equality. |
| 63 | * |
| 64 | * This method returns true if and only if the specified object is an |
| 65 | * ObjectEndpoint instance with the same object identifier and |
| 66 | * transport as this object. |
| 67 | **/ |
| 68 | public boolean equals(Object obj) { |
| 69 | if (obj instanceof ObjectEndpoint) { |
| 70 | ObjectEndpoint oe = (ObjectEndpoint) obj; |
| 71 | return id.equals(oe.id) && transport == oe.transport; |
| 72 | } else { |
| 73 | return false; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Returns the hash code value for this object endpoint. |
| 79 | */ |
| 80 | public int hashCode() { |
| 81 | return id.hashCode() ^ (transport != null ? transport.hashCode() : 0); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Returns a string representation for this object endpoint. |
| 86 | */ |
| 87 | public String toString() { |
| 88 | return id.toString(); |
| 89 | } |
| 90 | } |