| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| PagedEnumerationBase |
|
| 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 | } |