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Java > Open Source Codes > org > krysalis > jcharts > demo > simpleservlet > ChartServlet


1 /***********************************************************************************************
2  * File Info: $Id: ChartServlet.java,v 1.1 2003/08/28 01:17:36 nathaniel_auvil Exp $
3  * Copyright (C) 2002
4  * Author: Nathaniel G. Auvil
5  * Contributor(s):
6  *
7  * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
8  *
9  * Redistribution and use of this software and associated documentation ("Software"), with or
10  * without modification, are permitted provided that the following conditions are met:
11  *
12  * 1. Redistributions of source code must retain copyright statements and notices.
13  * Redistributions must also contain a copy of this document.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
16  * conditions and the following disclaimer in the documentation and/or other materials
17  * provided with the distribution.
18  *
19  * 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to endorse or promote
20  * products derived from this Software without prior written permission of Nathaniel G.
21  * Auvil. For written permission, please contact nathaniel_auvil@users.sourceforge.net
22  *
23  * 4. Products derived from this Software may not be called "jCharts" nor may "jCharts" appear
24  * in their names without prior written permission of Nathaniel G. Auvil. jCharts is a
25  * registered trademark of Nathaniel G. Auvil.
26  *
27  * 5. Due credit should be given to the jCharts Project (http://jcharts.sourceforge.net/).
28  *
29  * THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS ``AS IS'' AND ANY
30  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32  * jCharts OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
33  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,STRICT LIABILITY, OR TORT
36  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
37  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
38  ************************************************************************************************/
39
40 package org.krysalis.jcharts.demo.simpleservlet;
41
42
43 import org.krysalis.jcharts.Chart;
44 import org.krysalis.jcharts.chartData.ChartDataException;
45 import org.krysalis.jcharts.encoders.ServletEncoderHelper;
46 import org.krysalis.jcharts.properties.PropertyException;
47
48 import javax.servlet.ServletException JavaDoc;
49 import javax.servlet.http.HttpServlet JavaDoc;
50 import javax.servlet.http.HttpServletRequest JavaDoc;
51 import javax.servlet.http.HttpServletResponse JavaDoc;
52 import java.io.IOException JavaDoc;
53
54
55 public class ChartServlet extends HttpServlet JavaDoc
56 {
57     public static final String JavaDoc CHART = "CHART";
58     public static final String JavaDoc IMAGE_MAP = "IMAGE_MAP";
59
60
61     /**********************************************************************************************
62      *
63      **********************************************************************************************/
64     public void service( HttpServletRequest JavaDoc httpServletRequest, HttpServletResponse JavaDoc httpServletResponse ) throws ServletException JavaDoc, IOException JavaDoc
65     {
66         Chart chart = (Chart) httpServletRequest.getSession().getAttribute( CHART );
67
68         try
69         {
70             //---call encode just like you would normally
71 ServletEncoderHelper.encodeJPEG13( chart, 1.0f, httpServletResponse );
72         }
73         catch( PropertyException propertyException )
74         {
75             propertyException.printStackTrace();
76         }
77         catch( ChartDataException dataException )
78         {
79             dataException.printStackTrace();
80         }
81
82         httpServletRequest.getSession().removeAttribute( CHART );
83     }
84
85 }
86
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