01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.io;
22:
23: import com.db4o.*;
24:
25: /**
26: * base class for IoAdapters that delegate to other IoAdapters (decorator pattern)
27: */
28: public abstract class VanillaIoAdapter extends IoAdapter {
29:
30: protected IoAdapter _delegate;
31:
32: public VanillaIoAdapter(IoAdapter delegateAdapter) {
33: _delegate = delegateAdapter;
34: }
35:
36: protected VanillaIoAdapter(IoAdapter delegateAdapter, String path,
37: boolean lockFile, long initialLength, boolean readOnly)
38: throws Db4oIOException {
39: _delegate = delegateAdapter.open(path, lockFile, initialLength,
40: readOnly);
41: }
42:
43: public void close() throws Db4oIOException {
44: _delegate.close();
45: }
46:
47: public void delete(String path) {
48: _delegate.delete(path);
49: }
50:
51: public boolean exists(String path) {
52: return _delegate.exists(path);
53: }
54:
55: public long getLength() throws Db4oIOException {
56: return _delegate.getLength();
57: }
58:
59: public int read(byte[] bytes, int length) throws Db4oIOException {
60: return _delegate.read(bytes, length);
61: }
62:
63: public void seek(long pos) throws Db4oIOException {
64: _delegate.seek(pos);
65: }
66:
67: public void sync() throws Db4oIOException {
68: _delegate.sync();
69: }
70:
71: public void write(byte[] buffer, int length) throws Db4oIOException {
72: _delegate.write(buffer, length);
73: }
74:
75: }
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