01: /*
02: * $Id: ValuePool.java,v 1.1 2005/12/20 18:32:42 ahimanikya Exp $
03: * =======================================================================
04: * Copyright (c) 2006 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: package org.axiondb.util;
41:
42: /**
43: * Supports pooling of small range of integer values.
44: *
45: * @author Ahimanikya Satapathy
46: */
47: public class ValuePool {
48:
49: private static final int MAX_POOL_SIZE = 256;
50: private static final int MIN_POOL_SIZE = 16;
51: private static final Integer[] _ints = new Integer[ValuePool.MAX_POOL_SIZE];
52:
53: static {
54: for (int i = 0; i < ValuePool.MIN_POOL_SIZE; i++) {
55: _ints[i] = new Integer(i);
56: }
57: }
58:
59: // This is not really intended to be used by prepare statement setInt
60: // or IntergerType.convert, they can coviniently call this
61: // and if we exceeded max_size we will always create a new object
62: // But for some heavy duty methods like buildRowDecorators()
63: // the range is very small and they create Integer over and over,
64: // we have some benefit there if we are using this pool
65: public static Integer getInt(int key) {
66: if (key > -1 && key < ValuePool.MAX_POOL_SIZE) {
67: if (_ints[key] == null) {
68: _ints[key] = new Integer(key);
69: }
70: return _ints[key];
71: }
72: return new Integer(key);
73: }
74:
75: public static Boolean getBoolean(boolean b) {
76: return b ? Boolean.TRUE : Boolean.FALSE;
77: }
78: }
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