KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > krysalis > jcharts > encoders > PNGEncoder


1 /***********************************************************************************************
2  * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
3  *
4  * Redistribution and use of this software and associated documentation ("Software"), with or
5  * without modification, are permitted provided that the following conditions are met:
6  *
7  * 1. Redistributions of source code must retain copyright statements and notices.
8  * Redistributions must also contain a copy of this document.
9  *
10  * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
11  * conditions and the following disclaimer in the documentation and/or other materials
12  * provided with the distribution.
13  *
14  * 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to endorse or promote
15  * products derived from this Software without prior written permission of Nathaniel G.
16  * Auvil. For written permission, please contact nathaniel_auvil@users.sourceforge.net
17  *
18  * 4. Products derived from this Software may not be called "jCharts" nor may "jCharts" appear
19  * in their names without prior written permission of Nathaniel G. Auvil. jCharts is a
20  * registered trademark of Nathaniel G. Auvil.
21  *
22  * 5. Due credit should be given to the jCharts Project (http://jcharts.sourceforge.net/).
23  *
24  * THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS ``AS IS'' AND ANY
25  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
27  * jCharts OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,STRICT LIABILITY, OR TORT
31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
33  ************************************************************************************************/

34
35 package org.krysalis.jcharts.encoders;
36
37
38 import org.krysalis.jcharts.Chart;
39 import org.krysalis.jcharts.chartData.ChartDataException;
40 import org.krysalis.jcharts.properties.PropertyException;
41
42 import javax.imageio.ImageIO JavaDoc;
43 import java.awt.image.BufferedImage JavaDoc;
44 import java.io.IOException JavaDoc;
45 import java.io.OutputStream JavaDoc;
46
47
48 /*************************************************************************************
49  * This class REQUIRES the jdk 1.4
50  *
51  * @author Nathaniel Auvil
52  * @version $Id: PNGEncoder.java,v 1.2 2003/05/26 13:40:20 nathaniel_auvil Exp $
53  ************************************************************************************/

54 public class PNGEncoder
55 {
56     private static final String JavaDoc PNG = "png";
57
58
59     static
60     {
61         //---do not use a file cache as hurts performance
62
ImageIO.setUseCache( false );
63     }
64
65
66     /******************************************************************************************
67      *
68      *
69      ******************************************************************************************/

70     private PNGEncoder() throws Exception JavaDoc
71     {
72         throw new Exception JavaDoc( "No need to create an instance of this class!" );
73     }
74
75
76     /******************************************************************************************
77      * Encodes the Chart to an OutputStream which can be a file or any other OutputStream
78      * implementation.
79      *
80      * @param chart
81      * @param outputStream
82      * @throws ChartDataException
83      * @throws PropertyException
84      * @throws IOException
85      *******************************************************************************************/

86     public static void encode( Chart chart, OutputStream JavaDoc outputStream ) throws ChartDataException, PropertyException, IOException JavaDoc
87     {
88         BufferedImage JavaDoc bufferedImage = BinaryEncoderUtil.render( chart );
89         ImageIO.write( bufferedImage, PNG, outputStream );
90     }
91 }
92
Popular Tags