1 package org.apache.turbine.services.intake.transform;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Turbine" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache Turbine", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 import java.io.IOException;
58 import java.io.InputStream;
59 import java.net.URL;
60 import org.xml.sax.EntityResolver;
61 import org.xml.sax.InputSource;
62
63 /***
64 * A resolver to get the database.dtd file for the XML parser from the jar.
65 * This does not work with jdk1.3 on linux and OSX, see
66 * <a href="http://developer.java.sun.com/developer/bugParade/bugs/4337703.html">
67 * Bug 4337703</a>
68 *
69 * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a>
70 * @version $Id: DTDResolver.java,v 1.1.1.1 2001/08/16 05:08:57 jvanzyl Exp $
71 */
72 public class DTDResolver implements EntityResolver
73 {
74 /*** InputSource for database.dtd */
75 InputSource databaseDTD = null;
76
77 /***
78 * constructor
79 */
80 public DTDResolver()
81 {
82 try
83 {
84 InputStream dtdStream =
85 getClass().getResourceAsStream("intake.dtd");
86
87 // getResource was buggy on many systems including Linux,
88 // OSX, and some versions of windows in jdk1.3.
89 // getResourceAsStream works on linux, maybe others?
90 if (dtdStream != null)
91 {
92 databaseDTD = new InputSource(dtdStream);
93 }
94 }
95 catch (Exception ex)
96 {
97 ex.printStackTrace();
98 }
99 }
100
101 /***
102 * called by the XML parser
103 *
104 * @return an InputSource for the database.dtd file
105 */
106 public InputSource resolveEntity(String publicId, String systemId)
107 {
108 if (databaseDTD != null &&
109 "http://jakarta.apache.org/turbine/dtd/intake.dtd".equals(systemId))
110 {
111 System.out.println("Resolver: used intake.dtd");
112 return databaseDTD;
113 }
114 else
115 {
116 System.out.println("Resolver: used " + systemId);
117 return getInputSource(systemId);
118 }
119 }
120
121 /***
122 * get an InputSource for an URL String
123 *
124 * @param urlString
125 * @return an InputSource for the URL String
126 */
127 public InputSource getInputSource(String urlString)
128 {
129 try
130 {
131 URL url = new URL(urlString);
132 return new InputSource(url.openStream());
133 }
134 catch (IOException ex)
135 {
136 ex.printStackTrace();
137 }
138 return new InputSource();
139 }
140 }
141
142
143
144
145
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