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Java > Open Source Codes > org > krysalis > barcode > xalan > BarcodeExt


1 /*
2  * $Id: BarcodeExt.java,v 1.8 2003/10/29 07:50:27 jmaerki Exp $
3  * ============================================================================
4  * The Krysalis Patchy Software License, Version 1.1_01
5  * Copyright (c) 2002-2003 Nicola Ken Barozzi. All rights reserved.
6  *
7  * This Licence is compatible with the BSD licence as described and
8  * approved by http://www.opensource.org/, and is based on the
9  * Apache Software Licence Version 1.1.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions and the following disclaimer.
17  *
18  * 2. Redistributions in binary form must reproduce the above copyright
19  * notice, this list of conditions and the following disclaimer in
20  * the documentation and/or other materials provided with the
21  * distribution.
22  *
23  * 3. The end-user documentation included with the redistribution,
24  * if any, must include the following acknowledgment:
25  * "This product includes software developed for project
26  * Krysalis (http://www.krysalis.org/)."
27  * Alternately, this acknowledgment may appear in the software itself,
28  * if and wherever such third-party acknowledgments normally appear.
29  *
30  * 4. The names "Krysalis" and "Nicola Ken Barozzi" and
31  * "Krysalis Barcode" must not be used to endorse or promote products
32  * derived from this software without prior written permission. For
33  * written permission, please contact nicolaken@krysalis.org.
34  *
35  * 5. Products derived from this software may not be called "Krysalis",
36  * "Krysalis Barcode", nor may "Krysalis" appear in their name,
37  * without prior written permission of Nicola Ken Barozzi.
38  *
39  * 6. This software may contain voluntary contributions made by many
40  * individuals, who decided to donate the code to this project in
41  * respect of this licence, and was originally created by
42  * Jeremias Maerki <jeremias@maerki.org>.
43  *
44  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
45  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
47  * DISCLAIMED. IN NO EVENT SHALL THE KRYSALIS PROJECT OR
48  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
49  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
50  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
51  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
52  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
53  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
54  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55  * SUCH DAMAGE.
56  * ====================================================================
57  */
58 package org.krysalis.barcode.xalan;
59
60 import javax.xml.transform.TransformerException JavaDoc;
61
62 import org.apache.avalon.framework.configuration.Configuration;
63 import org.apache.avalon.framework.logger.Logger;
64 import org.apache.xalan.extensions.XSLProcessorContext;
65 import org.apache.xalan.templates.ElemExtensionCall;
66 import org.krysalis.barcode.BarcodeGenerator;
67 import org.krysalis.barcode.BarcodeUtil;
68 import org.krysalis.barcode.output.svg.SVGCanvasProvider;
69 import org.krysalis.barcode.tools.ConfigurationUtil;
70 import org.w3c.dom.DocumentFragment JavaDoc;
71 import org.w3c.dom.NodeList JavaDoc;
72
73 import org.xml.sax.SAXException JavaDoc;
74
75 /**
76  * This class is an Extension for Apache XML Xalan to generate SVG barcodes.
77  *
78  * @author Jeremias Maerki
79  */
80 public class BarcodeExt {
81
82     private Logger log = new org.apache.avalon.framework.logger.ConsoleLogger();
83
84     /**
85      * Generates a barcode in SVG format as a DOM fragment.
86      * @param nl node list with the XML configuration
87      * @param message the message to encode
88      * @return the DOM fragment
89      * @throws SAXException if generation fails
90      */
91     public DocumentFragment JavaDoc generate(NodeList JavaDoc nl, String JavaDoc message)
92                     throws SAXException JavaDoc {
93         try {
94             
95             //Build configuration
96 final Configuration cfg = ConfigurationUtil.buildConfiguration(nl.item(0));
97             
98             //Acquire BarcodeGenerator
99 final BarcodeGenerator gen =
100                     BarcodeUtil.getInstance().createBarcodeGenerator(cfg, log);
101     
102             //Setup Canvas
103 final SVGCanvasProvider svg;
104             if (cfg.getAttributeAsBoolean("useNamespace", true)) {
105                 svg = new SVGCanvasProvider(cfg.getAttribute("prefix", "svg"));
106             } else {
107                 svg = new SVGCanvasProvider(false);
108             }
109             //Generate barcode
110 gen.generateBarcode(svg, message);
111     
112             return svg.getDOMFragment();
113         } catch (Exception JavaDoc e) {
114             e.printStackTrace();
115             throw new SAXException JavaDoc(e);
116         }
117     }
118
119     /**
120      * Extension element: Generates a barcode in SVG format as a DOM fragment.
121      * @param context the processor context
122      * @param elem the extension element
123      * @return a DOM fragment containing the SVG barcode
124      * @throws javax.xml.transform.TransformerException if an Exception occurs
125      * during barcode generation
126      */
127     public DocumentFragment JavaDoc barcode(XSLProcessorContext context, ElemExtensionCall elem)
128             throws javax.xml.transform.TransformerException JavaDoc {
129         try {
130             String JavaDoc message = elem.getAttribute("message",
131                     context.getContextNode(), context.getTransformer());
132             
133             //Build configuration
134 final Configuration cfg = new ElemWrappingConfiguration(elem);
135             
136             //Acquire BarcodeGenerator
137 final BarcodeGenerator gen =
138                     BarcodeUtil.getInstance().createBarcodeGenerator(cfg, log);
139     
140             //Setup Canvas
141 final SVGCanvasProvider svg;
142             if (cfg.getAttributeAsBoolean("useNamespace", true)) {
143                 svg = new SVGCanvasProvider(cfg.getAttribute("prefix", "svg"));
144             } else {
145                 svg = new SVGCanvasProvider(false);
146             }
147             //Generate barcode
148 gen.generateBarcode(svg, message);
149     
150             return svg.getDOMFragment();
151         } catch (Exception JavaDoc e) {
152             e.printStackTrace();
153             throw new TransformerException JavaDoc(e);
154         }
155                   
156     }
157   
158
159 }
160
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