01: package com.quadcap.sql.file;
02:
03: /* Copyright 1997 - 2003 Quadcap Software. All rights reserved.
04: *
05: * This software is distributed under the Quadcap Free Software License.
06: * This software may be used or modified for any purpose, personal or
07: * commercial. Open Source redistributions are permitted. Commercial
08: * redistribution of larger works derived from, or works which bundle
09: * this software requires a "Commercial Redistribution License"; see
10: * http://www.quadcap.com/purchase.
11: *
12: * Redistributions qualify as "Open Source" under one of the following terms:
13: *
14: * Redistributions are made at no charge beyond the reasonable cost of
15: * materials and delivery.
16: *
17: * Redistributions are accompanied by a copy of the Source Code or by an
18: * irrevocable offer to provide a copy of the Source Code for up to three
19: * years at the cost of materials and delivery. Such redistributions
20: * must allow further use, modification, and redistribution of the Source
21: * Code under substantially the same terms as this license.
22: *
23: * Redistributions of source code must retain the copyright notices as they
24: * appear in each source code file, these license terms, and the
25: * disclaimer/limitation of liability set forth as paragraph 6 below.
26: *
27: * Redistributions in binary form must reproduce this Copyright Notice,
28: * these license terms, and the disclaimer/limitation of liability set
29: * forth as paragraph 6 below, in the documentation and/or other materials
30: * provided with the distribution.
31: *
32: * The Software is provided on an "AS IS" basis. No warranty is
33: * provided that the Software is free of defects, or fit for a
34: * particular purpose.
35: *
36: * Limitation of Liability. Quadcap Software shall not be liable
37: * for any damages suffered by the Licensee or any third party resulting
38: * from use of the Software.
39: */
40:
41: import java.io.IOException;
42: import java.io.InputStream;
43: import java.io.OutputStream;
44:
45: /**
46: * Interface to be implemented by page (and sub-page) allocators.
47: *
48: * @author Stan Bailes
49: */
50: public interface PageManager {
51: /**
52: * Allocate a new page.
53: */
54: public long newPage() throws IOException;
55:
56: /**
57: * Free a page.
58: *
59: * @param page a previously allocated page
60: */
61: public void freePage(long page) throws IOException;
62:
63: /**
64: * Return this manager's page size
65: */
66: public int getPageSize();
67:
68: /**
69: * Return the specified page
70: */
71: public Page getPage(long page) throws IOException;
72:
73: /**
74: * Return the file lock
75: */
76: public Object getLock();
77: }
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