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Java > Open Source Codes > com > jsptags > navigation > pager > PagerTagExtraInfo


1 /*
2  * Pager Tag Library
3  *
4  * Copyright (C) 2002 James Klicman <james@jsptags.com>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  */

20
21 package com.jsptags.navigation.pager;
22
23 import javax.servlet.jsp.*;
24 import javax.servlet.jsp.tagext.*;
25 import com.jsptags.navigation.pager.parser.*;
26
27 public final class PagerTagExtraInfo extends TagExtraInfo {
28
29     public VariableInfo[] getVariableInfo(TagData tagData) {
30         String JavaDoc export = tagData.getAttributeString("export");
31         if (export != null) {
32             try {
33                 PagerTagExport pagerTagExport =
34                     TagExportParser.parsePagerTagExport(export);
35                 int len = 0;
36                 if (pagerTagExport.getPageOffset() != null)
37                     len++;
38                 if (pagerTagExport.getPageNumber() != null)
39                     len++;
40
41                 VariableInfo[] varinfo = new VariableInfo[len];
42                 int i = 0;
43
44                 String JavaDoc name;
45                 if ((name = pagerTagExport.getPageOffset()) != null)
46                     varinfo[i++] = new VariableInfo(name,
47                             java.lang.Integer JavaDoc.class.getName(),
48                             true, VariableInfo.NESTED);
49                 if ((name = pagerTagExport.getPageNumber()) != null)
50                     varinfo[i++] = new VariableInfo(name,
51                             java.lang.Integer JavaDoc.class.getName(),
52                             true, VariableInfo.NESTED);
53
54                 return varinfo;
55             } catch (ParseException ex) {
56                 return new VariableInfo[0];
57             }
58         }
59         return new VariableInfo[0];
60     }
61
62     public boolean isValid(TagData tagData) {
63         String JavaDoc export = tagData.getAttributeString("export");
64         if (export != null) {
65             try {
66                 TagExportParser.parsePagerTagExport(export);
67             } catch (ParseException ex) {
68                 return false;
69             }
70         }
71         return true;
72     }
73 }
74
75 /* vim:set ts=4 sw=4: */
76
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