1 /* ====================================================================
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2003 Digital Clash LLC. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following 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 end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * ChronicJ team (http://www.chronicj.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "ChronicJ" and "Digital Clash" not be used to endorse or
27 * promote products derived from this software without prior written
28 * permission. For written permission, please contact
29 * info@digitalclash.com.
30 *
31 * 5. Products derived from this software may not be called "ChronicJ",
32 * "Digital Clash", nor may "ChronicJ" or "Digital Clash" appear in
33 * their name, without prior written permission of Digital Clash LLC.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 * This product includes software developed by the by the
49 * Apache Software Foundation (http://www.apache.org/).
50 * ====================================================================
51 */
52 package org.chronicj.impl;
53
54 import org.chronicj.TemporalExpression;
55 import org.chronicj.TimePoint;
56
57 import java.util.Iterator;
58
59
60 /***
61 * <p>
62 * Composite {@link org.chronicj.TemporalExpression} that provides a union of
63 * the composing expressions for use in a set expression.
64 * </p>
65 * <p>
66 * This class is based directly on patterns described in a paper by Martin
67 * Fowler which can be found
68 * <a href="http://martinfowler.com/apsupp/recurring.pdf">here</a>.
69 * </p>
70 *
71 * @author <a href="mlipper@US-ABP.com">Matthew Lipper</a>
72 * @see <a href="http://martinfowler.com/apsupp/recurring.pdf">Recurring Events
73 * for Calendars</a> by Martin Fowler
74 */
75 public class UnionTE extends CollectionTE {
76 /***
77 * Creates an instance of UnionTE.
78 */
79 public UnionTE() {
80 super();
81 }
82
83 /*
84 * @see org.chronicj.TemporalExpression#includes(org.chronicj.TimePoint)
85 */
86 public boolean includes(TimePoint aTimePoint) {
87 if (!containsExpressions()) {
88 return false;
89 }
90
91 for (Iterator i = getExpressions().iterator(); i.hasNext();) {
92 TemporalExpression anExpression = (TemporalExpression) i.next();
93
94 if (anExpression.includes(aTimePoint)) {
95 return true;
96 }
97 }
98
99 return false;
100 }
101 }
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