01: /*
02: * $Id: FileLobSource.java,v 1.6 2005/04/14 00:30:01 ahimanikya Exp $
03: * =======================================================================
04: * Copyright (c) 2002-2005 Axion Development Team. All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: *
10: * 1. Redistributions of source code must retain the above
11: * copyright notice, this list of conditions and the following
12: * disclaimer.
13: *
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in
16: * the documentation and/or other materials provided with the
17: * distribution.
18: *
19: * 3. The names "Tigris", "Axion", nor the names of its contributors may
20: * not be used to endorse or promote products derived from this
21: * software without specific prior written permission.
22: *
23: * 4. Products derived from this software may not be called "Axion", nor
24: * may "Tigris" or "Axion" appear in their names without specific prior
25: * written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
30: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38: * =======================================================================
39: */
40:
41: package org.axiondb.types;
42:
43: import java.io.File;
44: import java.io.InputStream;
45: import java.io.OutputStream;
46:
47: import org.axiondb.AxionException;
48: import org.axiondb.io.AxionFileSystem;
49: import org.axiondb.io.FileUtil;
50:
51: /**
52: * A {@link LobSource}that's backed by a simple {@link File}.
53: *
54: * @version $Revision: 1.6 $ $Date: 2005/04/14 00:30:01 $
55: * @author Rodney Waldhoff
56: * @author Ahimanikya Satapathy
57: */
58: public class FileLobSource implements LobSource {
59:
60: public FileLobSource(File file) {
61: _file = file;
62: }
63:
64: public long length() throws AxionException {
65: return _file.length();
66: }
67:
68: public void truncate(long length) throws AxionException {
69: FileUtil.truncate(getFile(), length);
70: }
71:
72: public InputStream getInputStream() throws AxionException {
73: return FS.openBufferedDIS(getFile());
74: }
75:
76: public OutputStream setOutputStream(long pos) throws AxionException {
77: return FS.openBufferedDOS(_file, pos);
78: }
79:
80: private File getFile() {
81: return _file;
82: }
83:
84: private File _file = null;
85: static AxionFileSystem FS = new AxionFileSystem();
86: }
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