Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
PagedEnumerationBase |
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| 1.3636363636363635;1.364 |
1 | /* | |
2 | * $Source: /usr/cvsroot/melati/melati/src/site/resources/withWebmacro/org.melati.util.PagedEnumerationBase.html,v $ | |
3 | * $Revision: 1.1 $ | |
4 | * | |
5 | * Copyright (C) 2003 Tim Pizey | |
6 | * | |
7 | * Part of Melati (http://melati.org), a framework for the rapid | |
8 | * development of clean, maintainable web applications. | |
9 | * | |
10 | * Melati is free software; Permission is granted to copy, distribute | |
11 | * and/or modify this software under the terms either: | |
12 | * | |
13 | * a) the GNU General Public License as published by the Free Software | |
14 | * Foundation; either version 2 of the License, or (at your option) | |
15 | * any later version, | |
16 | * | |
17 | * or | |
18 | * | |
19 | * b) any version of the Melati Software License, as published | |
20 | * at http://melati.org | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License and | |
23 | * the Melati Software License along with this program; | |
24 | * if not, write to the Free Software Foundation, Inc., | |
25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the | |
26 | * GNU General Public License and visit http://melati.org to obtain the | |
27 | * Melati Software License. | |
28 | * | |
29 | * Feel free to contact the Developers of Melati (http://melati.org), | |
30 | * if you would like to work out a different arrangement than the options | |
31 | * outlined here. It is our intention to allow Melati to be used by as | |
32 | * wide an audience as possible. | |
33 | * | |
34 | * This program is distributed in the hope that it will be useful, | |
35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
37 | * GNU General Public License for more details. | |
38 | * | |
39 | * Contact details for copyright holder: | |
40 | * | |
41 | * Tim Pizey <timp At paneris.org> | |
42 | */ | |
43 | ||
44 | package org.melati.util; | |
45 | ||
46 | import java.util.Vector; | |
47 | import java.util.Enumeration; | |
48 | ||
49 | ||
50 | /** | |
51 | * All the code common to {@link CountedDumbPagedEnumeration} | |
52 | * and {@link DumbPagedEnumeration}. | |
53 | */ | |
54 | 174 | public abstract class PagedEnumerationBase<T> implements PagedEnumeration<T> { |
55 | ||
56 | int pageStart, pageSize; | |
57 | Vector<T> page; | |
58 | int totalCount; | |
59 | Enumeration<T> us; | |
60 | int currentPosition; | |
61 | ||
62 | ||
63 | // | |
64 | // ------------- | |
65 | // Enumeration | |
66 | // ------------- | |
67 | // | |
68 | ||
69 | /** | |
70 | * {@inheritDoc} | |
71 | * @see java.util.Enumeration#hasMoreElements() | |
72 | */ | |
73 | public boolean hasMoreElements() { | |
74 | 1150 | return us.hasMoreElements(); |
75 | } | |
76 | ||
77 | /** | |
78 | * {@inheritDoc} | |
79 | * @see java.util.Enumeration#nextElement() | |
80 | */ | |
81 | public T nextElement() { | |
82 | 1020 | currentPosition++; |
83 | 1020 | return us.nextElement(); |
84 | } | |
85 | ||
86 | // | |
87 | // ----------------- | |
88 | // PagedEnumeration | |
89 | // ----------------- | |
90 | // | |
91 | /** | |
92 | * {@inheritDoc} | |
93 | * @see org.melati.poem.util.PagedEnumeration#getPageStart() | |
94 | */ | |
95 | public int getPageStart() { | |
96 | 138 | return pageStart; |
97 | } | |
98 | ||
99 | /** | |
100 | * {@inheritDoc} | |
101 | * @see org.melati.poem.util.PagedEnumeration#getPageEnd() | |
102 | */ | |
103 | public int getPageEnd() { | |
104 | 126 | return pageStart + page.size() - 1; |
105 | } | |
106 | ||
107 | /** | |
108 | * {@inheritDoc} | |
109 | * @see org.melati.poem.util.PagedEnumeration#getTotalCount() | |
110 | */ | |
111 | public int getTotalCount() { | |
112 | 122 | return totalCount; |
113 | } | |
114 | ||
115 | /** | |
116 | * {@inheritDoc} | |
117 | * @see org.melati.poem.util.PagedEnumeration#getPrevPageStart() | |
118 | */ | |
119 | public Integer getPrevPageStart() { | |
120 | 132 | int it = pageStart - pageSize; |
121 | 132 | return it < 0 ? null : new Integer(it); |
122 | } | |
123 | ||
124 | /** | |
125 | * {@inheritDoc} | |
126 | * @see org.melati.poem.util.PagedEnumeration#getCurrentPosition() | |
127 | */ | |
128 | public int getCurrentPosition() { | |
129 | 4 | return currentPosition; |
130 | } | |
131 | ||
132 | /** | |
133 | * {@inheritDoc} | |
134 | * @see org.melati.poem.util.PagedEnumeration#getNextPosition() | |
135 | */ | |
136 | public int getNextPosition() { | |
137 | 8 | return hasMoreElements() ? currentPosition + 1 : 0; |
138 | } | |
139 | ||
140 | /** | |
141 | * {@inheritDoc} | |
142 | * @see org.melati.poem.util.PagedEnumeration#nextElementOnThisPage() | |
143 | */ | |
144 | public boolean nextElementOnThisPage() { | |
145 | 4 | return hasMoreElements() && getPageEnd() >= getNextPosition(); |
146 | } | |
147 | ||
148 | /** | |
149 | * {@inheritDoc} | |
150 | * @see org.melati.poem.util.PagedEnumeration#getPageSize() | |
151 | */ | |
152 | public int getPageSize() { | |
153 | 4 | return page.size(); |
154 | } | |
155 | ||
156 | ||
157 | ||
158 | /** | |
159 | * @return All Pages | |
160 | */ | |
161 | public Vector<Page> getPages() { | |
162 | 8 | Vector<Page> ret = new Vector<Page>(totalCount / pageSize); |
163 | 8 | int i = 1; |
164 | 32 | while(((i - 1) * pageSize) < totalCount) { |
165 | 24 | ret.addElement(new Page(i, ((i - 1) * pageSize) + 1)); |
166 | 24 | i++; |
167 | } | |
168 | 8 | return ret; |
169 | } | |
170 | ||
171 | } |