01: /*
02: *
03: *
04: * Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: */
26:
27: package com.sun.midp.services;
28:
29: import java.io.DataInput;
30: import java.io.DataOutput;
31:
32: /**
33: * Message is what is passed between service and client. At low
34: * level message body is just array of bytes. It is also possible
35: * to write/extract a sequence of primitive types from the message.
36: * In other words, message body can be seen as data stream from which
37: * you can read/write primitive types.
38: */
39: public abstract class SystemServiceMessage {
40: /**
41: * Creates an empty message.
42: *
43: * @return empty message
44: */
45: public static SystemServiceMessage newMessage() {
46: return new SystemServiceWriteMessage();
47: }
48:
49: /**
50: * Gets message body as DataInput.
51: *
52: * @return DataInput interface for reading data from message
53: */
54: abstract public DataInput getDataInput();
55:
56: /**
57: * Gets message body as DataOutput.
58: *
59: * @return DataOutput interface for writing data to message
60: */
61: abstract public DataOutput getDataOutput();
62: }
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