KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > net > sf > jasperreports > j2ee > servlets > BaseHttpServlet


1 /*
2  * ============================================================================
3  * GNU Lesser General Public License
4  * ============================================================================
5  *
6  * JasperReports - Free Java report-generating library.
7  * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22  *
23  * JasperSoft Corporation
24  * 303 Second Street, Suite 450 North
25  * San Francisco, CA 94107
26  * http://www.jaspersoft.com
27  */
28 package net.sf.jasperreports.j2ee.servlets;
29
30 import java.util.ArrayList JavaDoc;
31 import java.util.List JavaDoc;
32
33 import javax.servlet.http.HttpServlet JavaDoc;
34 import javax.servlet.http.HttpServletRequest JavaDoc;
35
36 import net.sf.jasperreports.engine.JasperPrint;
37
38
39 /**
40  * @author Teodor Danciu (teodord@users.sourceforge.net)
41  * @version $Id: BaseHttpServlet.java 1229 2006-04-19 13:27:35 +0300 (Wed, 19 Apr 2006) teodord $
42  */
43 public abstract class BaseHttpServlet extends HttpServlet JavaDoc
44 {
45
46
47     /**
48      *
49      */
50     public static final String JavaDoc DEFAULT_JASPER_PRINT_LIST_SESSION_ATTRIBUTE = "net.sf.jasperreports.j2ee.jasper_print_list";
51     public static final String JavaDoc DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE = "net.sf.jasperreports.j2ee.jasper_print";
52
53     public static final String JavaDoc JASPER_PRINT_LIST_REQUEST_PARAMETER = "jrprintlist";
54     public static final String JavaDoc JASPER_PRINT_REQUEST_PARAMETER = "jrprint";
55
56     public static final String JavaDoc BUFFERED_OUTPUT_REQUEST_PARAMETER = "buffered";
57     
58             
59     /**
60      *
61      */
62     public static List JavaDoc getJasperPrintList(HttpServletRequest JavaDoc request)
63     {
64         String JavaDoc jasperPrintListSessionAttr = request.getParameter(JASPER_PRINT_LIST_REQUEST_PARAMETER);
65         if (jasperPrintListSessionAttr == null)
66         {
67             jasperPrintListSessionAttr = DEFAULT_JASPER_PRINT_LIST_SESSION_ATTRIBUTE;
68         }
69
70         String JavaDoc jasperPrintSessionAttr = request.getParameter(JASPER_PRINT_REQUEST_PARAMETER);
71         if (jasperPrintSessionAttr == null)
72         {
73             jasperPrintSessionAttr = DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE;
74         }
75         
76         List JavaDoc jasperPrintList = (List JavaDoc)request.getSession().getAttribute(jasperPrintListSessionAttr);
77         if (jasperPrintList == null)
78         {
79             JasperPrint jasperPrint = (JasperPrint)request.getSession().getAttribute(jasperPrintSessionAttr);
80             if (jasperPrint != null)
81             {
82                 jasperPrintList = new ArrayList JavaDoc();
83                 jasperPrintList.add(jasperPrint);
84             }
85         }
86         
87         return jasperPrintList;
88     }
89
90
91 }
92
Popular Tags