BufferManagerReadGrow.java revision 608:7e06bf1dcb09 
1/*
2 * Copyright (c) 2000, 2003, Oracle and/or its affiliates. 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.corba.se.impl.encoding;
27
28import java.nio.ByteBuffer;
29import com.sun.corba.se.spi.orb.ORB;
30import com.sun.corba.se.spi.logging.CORBALogDomains;
31import com.sun.corba.se.impl.protocol.giopmsgheaders.FragmentMessage;
32import com.sun.corba.se.impl.protocol.giopmsgheaders.Message;
33import com.sun.corba.se.impl.logging.ORBUtilSystemException;
34
35public class BufferManagerReadGrow
36    implements BufferManagerRead, MarkAndResetHandler
37{
38    // REVISIT - This should go in an abstract class called
39    //           BufferManagerReadBase which should implement
40    //           BufferManagerRead. Then, this class should extend
41    //           BufferManagerReadBase.
42    private ORB orb ;
43
44    private ORBUtilSystemException wrapper ;
45
46    BufferManagerReadGrow( ORB orb )
47    {
48        this.orb = orb ;
49        this.wrapper = ORBUtilSystemException.get( orb,
50            CORBALogDomains.RPC_ENCODING ) ;
51    }
52
53    public void processFragment (ByteBuffer byteBuffer, FragmentMessage header)
54    {
55        // REVISIT - should we consider throwing an exception similar to what's
56        //           done for underflow()???
57    }
58
59    public void init(Message msg) {}
60
61    public ByteBufferWithInfo underflow (ByteBufferWithInfo bbwi)
62    {
63        throw wrapper.unexpectedEof() ;
64    }
65
66    public void cancelProcessing(int requestId) {}
67
68    // Mark and reset handler -------------------------
69
70    private Object streamMemento;
71    private RestorableInputStream inputStream;
72    private boolean markEngaged = false;
73
74    public MarkAndResetHandler getMarkAndResetHandler() {
75        return this;
76    }
77
78    public void mark(RestorableInputStream is) {
79        markEngaged = true;
80        inputStream = is;
81        streamMemento = inputStream.createStreamMemento();
82    }
83
84    // This will never happen
85    public void fragmentationOccured(ByteBufferWithInfo newFragment) {}
86
87    public void reset() {
88
89        if (!markEngaged)
90            return;
91
92        markEngaged = false;
93        inputStream.restoreInternalState(streamMemento);
94        streamMemento = null;
95    }
96
97    // Nothing to close and cleanup.
98    public void close(ByteBufferWithInfo bbwi) {}
99}
100