01: /*
02: * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * 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 com.sun.corba.se.impl.ior.iiop;
26:
27: import org.omg.CORBA_2_3.portable.OutputStream;
28:
29: import com.sun.corba.se.impl.orbutil.ORBConstants;
30: import com.sun.corba.se.impl.orbutil.ORBUtility;
31: import com.sun.corba.se.impl.protocol.giopmsgheaders.Message;
32:
33: import com.sun.corba.se.spi.orb.ORB;
34: import com.sun.corba.se.spi.ior.TaggedComponentBase;
35:
36: /**
37: * Tagged component that contains a value that indicates the Java
38: * serialization version supported by the ORB.
39: *
40: * ORB Java serialization uses IIOP as the transport protocol, but uses
41: * Java serialization mechanism and its accompanying encodings, instead
42: * of IIOP CDR serialization mechanism. Java serialization is generally
43: * observed to be faster than CDR.
44: */
45: public class JavaSerializationComponent extends TaggedComponentBase {
46:
47: private byte version;
48:
49: private static JavaSerializationComponent singleton;
50:
51: public static JavaSerializationComponent singleton() {
52: if (singleton == null) {
53: synchronized (JavaSerializationComponent.class) {
54: singleton = new JavaSerializationComponent(
55: Message.JAVA_ENC_VERSION);
56: }
57: }
58: return singleton;
59: }
60:
61: public JavaSerializationComponent(byte version) {
62: this .version = version;
63: }
64:
65: public byte javaSerializationVersion() {
66: return this .version;
67: }
68:
69: public void writeContents(OutputStream os) {
70: os.write_octet(version);
71: }
72:
73: public int getId() {
74: return ORBConstants.TAG_JAVA_SERIALIZATION_ID;
75: }
76:
77: public boolean equals(Object obj) {
78: if (!(obj instanceof JavaSerializationComponent)) {
79: return false;
80: }
81: JavaSerializationComponent other = (JavaSerializationComponent) obj;
82: return this .version == other.version;
83: }
84:
85: public int hashCode() {
86: return this.version;
87: }
88: }
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