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Java > Open Source Codes > org > apache > fop > apps > InputHandler


1 /*
2  * $Id: InputHandler.java,v 1.5.2.3 2003/02/25 10:18:32 jeremias Exp $
3  * ============================================================================
4  * The Apache Software License, Version 1.1
5  * ============================================================================
6  *
7  * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without modifica-
10  * tion, are permitted provided that the following conditions are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  *
19  * 3. The end-user documentation included with the redistribution, if any, must
20  * include the following acknowledgment: "This product includes software
21  * developed by the Apache Software Foundation (http://www.apache.org/)."
22  * Alternately, this acknowledgment may appear in the software itself, if
23  * and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. The names "FOP" and "Apache Software Foundation" must not be used to
26  * endorse or promote products derived from this software without prior
27  * written permission. For written permission, please contact
28  * apache@apache.org.
29  *
30  * 5. Products derived from this software may not be called "Apache", nor may
31  * "Apache" appear in their name, without prior written permission of the
32  * Apache Software Foundation.
33  *
34  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44  * ============================================================================
45  *
46  * This software consists of voluntary contributions made by many individuals
47  * on behalf of the Apache Software Foundation and was originally created by
48  * James Tauber <jtauber@jtauber.com>. For more information on the Apache
49  * Software Foundation, please see <http://www.apache.org/>.
50  */
51 package org.apache.fop.apps;
52
53 // SAX
54 import org.xml.sax.InputSource JavaDoc;
55 import org.xml.sax.XMLReader JavaDoc;
56
57 // Java
58 import java.net.URL JavaDoc;
59 import java.io.File JavaDoc;
60 import javax.xml.parsers.*;
61
62 // FOP
63 import org.apache.fop.messaging.MessageHandler;
64
65 abstract public class InputHandler {
66
67     abstract public InputSource JavaDoc getInputSource();
68     abstract public XMLReader JavaDoc getParser() throws FOPException;
69     abstract public void run(Driver driver) throws FOPException;
70
71
72     static public InputSource JavaDoc urlInputSource(URL JavaDoc url) {
73         return new InputSource JavaDoc(url.toString());
74     }
75
76     /**
77      * create an InputSource from a File
78      *
79      * @param file the File
80      * @return the InputSource created
81      */
82     static public InputSource JavaDoc fileInputSource(File JavaDoc file) {
83         /* this code adapted from James Clark's in XT */
84         String JavaDoc path = file.getAbsolutePath();
85         String JavaDoc fSep = System.getProperty("file.separator");
86         if (fSep != null && fSep.length() == 1)
87             path = path.replace(fSep.charAt(0), '/');
88         if (path.length() > 0 && path.charAt(0) != '/')
89             path = '/' + path;
90         try {
91             return new InputSource JavaDoc(new URL JavaDoc("file", null, path).toString());
92         } catch (java.net.MalformedURLException JavaDoc e) {
93             throw new Error JavaDoc("unexpected MalformedURLException");
94         }
95     }
96
97     /**
98      * creates a SAX parser
99      *
100      * @return the created SAX parser
101      */
102     protected static XMLReader JavaDoc createParser() throws FOPException {
103         try {
104             SAXParserFactory spf = javax.xml.parsers.SAXParserFactory.newInstance();
105             spf.setNamespaceAware(true);
106             XMLReader JavaDoc xmlReader = spf.newSAXParser().getXMLReader();
107             MessageHandler.logln("Using " + xmlReader.getClass().getName() + " as SAX2 Parser");
108             return xmlReader;
109         } catch (javax.xml.parsers.ParserConfigurationException JavaDoc e) {
110           throw new FOPException(e);
111         } catch (org.xml.sax.SAXException JavaDoc e) {
112           throw new FOPException( e);
113         }
114     }
115
116 }
117
118
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