1 /***
2 * ANDFilter.java
3 *
4 * This file is part of the creme library.
5 * The creme library intends to ease the development effort of large
6 * applications by providing easy to use support classes.
7 *
8 * Copyright (C) 2002 Denis Bregeon
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 * contact information: dbregeon@sourceforge.net
25 */
26 package org.jcreme.filters;
27
28 /***
29 * This implementation of the ReportFilter interface enables to combine a number
30 * of other ReportFilter with AND logic operators.
31 *
32 * This means that a value tested through this filter would have to qualify for
33 * each individual component filter.
34 *
35 * @author $Author: dbregeon $
36 * @version $Revision: 1.2 $
37 */
38 public class ANDFilter extends BaseReportFilter {
39 static final long serialVersionUID = 6883172699329218012L;
40
41 /***
42 * The filters to combine in this ANDFilter.
43 */
44 private final ReportFilter[] filters;
45
46 /***
47 * Creates new ANDFilter
48 *
49 * @param filters
50 * the filters combined by this ANDFilter.
51 */
52 public ANDFilter(ReportFilter[] filters) {
53 this.filters = filters;
54 }
55
56 /***
57 * This is the actual filtering method.
58 *
59 * @param obj
60 * object to filter.
61 * @return true if the given object satisfies all the conditions of the
62 * filter.
63 */
64 public boolean accept(final Object obj) {
65 boolean result = true;
66 if (this.filters != null) {
67 for (int i = 0; ((result) && (i < this.filters.length)); i++) {
68 if (this.filters[i] != null) {
69 result = result && this.filters[i].accept(obj);
70 }
71 }
72 }
73 return result;
74 }
75
76 /***
77 * This method gives access to the filters combined by this ANDFilter.
78 *
79 * @return the component filters.
80 */
81 public ReportFilter[] getFilters() {
82 return this.filters;
83 }
84
85 /***
86 * This method clones this filter and the resulting ANDFilter has the
87 * component filters clones as components.
88 *
89 * @return the cloned ANDFilter.
90 */
91 public Object clone() {
92 final ANDFilter clonedFilter = (ANDFilter) super.clone();
93 for (int i = 0; i < this.filters.length; i++) {
94 if (this.filters[i] != null) {
95 clonedFilter.filters[i] = ((ReportFilter) this.filters[i]
96 .clone());
97 }
98 }
99 return clonedFilter;
100 }
101 }