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1
12 package org.displaytag.pagination;
13
14 import java.text.MessageFormat  ;
15 import java.util.List ;
16
17 import org.apache.commons.lang.builder.ToStringBuilder;
18 import org.apache.commons.lang.builder.ToStringStyle;
19 import org.displaytag.properties.TableProperties;
20 import org.displaytag.util.Href;
21
22
23
28 public class PaginatedListSmartListHelper extends SmartListHelper
29 {
30
31 private PaginatedList paginatedList;
32
33 private TableProperties properties;
34
35 private int pageCount;
36
37 public PaginatedListSmartListHelper(PaginatedList paginatedList, TableProperties tableProperties)
38 {
39 super();
40 this.paginatedList = paginatedList;
41 this.properties = tableProperties;
42 this.pageCount = computePageCount();
43 }
44
45 private int computePageCount()
46 {
47 int pageCount = paginatedList.getFullListSize() / Math.max(1, paginatedList.getObjectsPerPage());
48 if ((paginatedList.getFullListSize() % paginatedList.getObjectsPerPage()) > 0)
49 {
50 pageCount++;
51 }
52 return pageCount;
53 }
54
55 public int getFirstIndexForCurrentPage()
56 {
57 return getFirstIndexForPage(paginatedList.getPageNumber());
58 }
59
60 protected int getFirstIndexForPage(int pageNumber)
61 {
62 if (pageNumber > pageCount)
63 {
64 pageNumber = pageCount;
65 }
66
67 return ((pageNumber - 1) * paginatedList.getObjectsPerPage());
68 }
69
70 protected int getLastIndexForCurrentPage()
71 {
72 return getLastIndexForPage(paginatedList.getPageNumber());
73 }
74
75 protected int getLastIndexForPage(int pageNumber)
76 {
77 if (pageNumber > pageCount)
78 {
79 pageNumber = pageCount;
80 }
81
82 int result = getFirstIndexForPage(pageNumber) + paginatedList.getObjectsPerPage() - 1;
83 if (result >= paginatedList.getFullListSize())
84 {
85 result = paginatedList.getFullListSize() - 1;
86 }
87 return result;
88 }
89
90 public List getListForCurrentPage()
91 {
92 return paginatedList.getList();
93 }
94
95 protected List getListForPage(int pageNumber)
96 {
97 if ((pageNumber) == paginatedList.getPageNumber())
98 {
99 return getListForCurrentPage();
100 }
101 else
102 {
103 return null;
104 }
105 }
106
107 public String getPageNavigationBar(Href baseHref, String pageParameter)
108 {
109
110 int groupSize = this.properties.getPagingGroupSize();
111 int startPage;
112 int endPage;
113
114 Pagination pagination = new Pagination(baseHref, pageParameter);
115 pagination.setCurrent(new Integer (paginatedList.getPageNumber()));
116
117 if (pageCount == 0)
119 {
120 pagination.addPage(1, true);
121 }
122
123 startPage = Math.max(Math.min(paginatedList.getPageNumber() - groupSize / 2, pageCount - (groupSize - 1)), 1);
127 endPage = Math.min(startPage + groupSize - 1, pageCount);
128
129 if (paginatedList.getPageNumber() != 1)
130 {
131 pagination.setFirst(new Integer (1));
132 pagination.setPrevious(new Integer (paginatedList.getPageNumber() - 1));
133 }
134
135 for (int j = startPage; j <= endPage; j++)
136 {
137 pagination.addPage(j, (j == paginatedList.getPageNumber()));
138 }
139
140 if (paginatedList.getPageNumber() != pageCount)
141 {
142 pagination.setNext(new Integer (paginatedList.getPageNumber() + 1));
143 pagination.setLast(new Integer (pageCount));
144 }
145
146 String bannerFormat;
148
149 if (pagination.isOnePage())
150 {
151 bannerFormat = this.properties.getPagingBannerOnePage();
152 }
153 else if (pagination.isFirst())
154 {
155 bannerFormat = this.properties.getPagingBannerFirst();
156 }
157 else if (pagination.isLast())
158 {
159 bannerFormat = this.properties.getPagingBannerLast();
160 }
161 else
162 {
163 bannerFormat = this.properties.getPagingBannerFull();
164 }
165
166 return pagination.getFormattedBanner(this.properties.getPagingPageLink(), this.properties
167 .getPagingPageSelected(), this.properties.getPagingPageSeparator(), bannerFormat);
168 }
169
170 public String getSearchResultsSummary()
171 {
172
173 Object [] objs;
174 String message;
175
176 if (this.paginatedList.getFullListSize() == 0)
177 {
178 objs = new Object []{this.properties.getPagingItemsName()};
179 message = this.properties.getPagingFoundNoItems();
180 }
181 else if (this.paginatedList.getFullListSize() == 1)
182 {
183 objs = new Object []{this.properties.getPagingItemName()};
184 message = this.properties.getPagingFoundOneItem();
185 }
186 else if (pageCount == 1)
187 {
188 objs = new Object []{
189 new Integer (this.paginatedList.getFullListSize()),
190 this.properties.getPagingItemsName(),
191 this.properties.getPagingItemsName()};
192 message = this.properties.getPagingFoundAllItems();
193 }
194 else
195 {
196 objs = new Object []{
197 new Integer (this.paginatedList.getFullListSize()),
198 this.properties.getPagingItemsName(),
199 new Integer (getFirstIndexForCurrentPage() + 1),
200 new Integer (getLastIndexForCurrentPage() + 1),
201 new Integer (this.paginatedList.getPageNumber()),
202 new Integer (pageCount)};
203 message = this.properties.getPagingFoundSomeItems();
204 }
205
206 return MessageFormat.format(message, objs);
207 }
208
209
212 public String toString()
213 {
214 return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE) .append("paginatedList", this.paginatedList) .append("properties", this.properties) .toString();
218 }
219 } |
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