01: /* ====================================================================
02: The Jicarilla Software License
03:
04: Copyright (c) 2003 Leo Simons.
05: All rights reserved.
06:
07: Permission is hereby granted, free of charge, to any person obtaining
08: a copy of this software and associated documentation files (the
09: "Software"), to deal in the Software without restriction, including
10: without limitation the rights to use, copy, modify, merge, publish,
11: distribute, sublicense, and/or sell copies of the Software, and to
12: permit persons to whom the Software is furnished to do so, subject to
13: the following conditions:
14:
15: The above copyright notice and this permission notice shall be
16: included in all copies or substantial portions of the Software.
17:
18: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19: EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20: MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21: IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
22: CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23: TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24: SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25: ==================================================================== */
26: package org.jicarilla.container.selectors;
27:
28: import org.jicarilla.lang.Assert;
29: import org.jicarilla.lang.CriterionExposingSelector;
30:
31: /**
32: *
33: *
34: * @author <a href="mail at leosimons dot com">Leo Simons</a>
35: * @version $Id: InstanceofSelector.java,v 1.5 2004/03/23 13:37:52 lsimons Exp $
36: */
37: public class InstanceofSelector implements CriterionExposingSelector {
38: protected final Class m_criterion;
39:
40: public InstanceofSelector(final Class criterion) {
41: Assert.assertNotNull("criterion argument may not be null",
42: criterion);
43: m_criterion = criterion;
44: }
45:
46: public boolean select(final Object object) {
47: if (object == null)
48: return false;
49: if (m_criterion.isInstance(object))
50: return true;
51:
52: return false;
53: }
54:
55: public Object getCriterion() {
56: return m_criterion;
57: }
58:
59: public boolean equals(Object o) {
60: if (this == o)
61: return true;
62:
63: if (!(o instanceof InstanceofSelector))
64: return false;
65:
66: final InstanceofSelector instanceof Selector = (InstanceofSelector) o;
67:
68: if (!m_criterion.equals(instanceof Selector.m_criterion))
69: return false;
70:
71: return true;
72: }
73:
74: public int hashCode() {
75: return getCriterion().hashCode() + 120;
76: }
77: }
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