01: /*
02: * $Id: FileLobLocatorFactory.java,v 1.5 2005/04/13 00:42:58 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.DataInput;
44: import java.io.DataOutput;
45: import java.io.File;
46: import java.io.IOException;
47: import java.util.Random;
48:
49: import org.axiondb.util.ExceptionConverter;
50:
51: /**
52: * A {@link LobLocatorFactory} for {@link FileLobLocator}s.
53: *
54: * @version $Revision: 1.5 $ $Date: 2005/04/13 00:42:58 $
55: * @author Rodney Waldhoff
56: */
57: public class FileLobLocatorFactory implements LobLocatorFactory {
58: public void write(LobLocator locator, DataOutput out)
59: throws IOException {
60: ((FileLobLocator) locator).write(out);
61: }
62:
63: public LobLocator read(DataInput in) throws IOException {
64: return new FileLobLocator(in.readUTF(), in.readUTF());
65: }
66:
67: public LobLocator makeLobLocator(File parentdir) {
68: try {
69: File dir = getNextLobDir(parentdir);
70: if (!dir.exists()) {
71: dir.mkdirs();
72: }
73: File file = File.createTempFile(_LOB_PREFIX, _LOB_SUFFIX,
74: dir);
75: return new FileLobLocator(file);
76: } catch (IOException e) {
77: throw ExceptionConverter.convertToRuntimeException(e);
78: }
79: }
80:
81: private File getNextLobDir(File parentdir) {
82: return new File(parentdir, String.valueOf(Math
83: .abs(_counter++ % 1000)));
84: }
85:
86: private int _counter = (new Random()).nextInt();
87: private static final String _LOB_PREFIX = "LOB";
88: private static final String _LOB_SUFFIX = ".LOB";
89: private final static long serialVersionUID = 1730401347993196339L;
90:
91: }
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