KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > fulcrum > intake > transform > DTDResolver


1 package org.apache.fulcrum.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 JavaDoc;
58 import java.io.InputStream JavaDoc;
59 import java.net.URL JavaDoc;
60 import org.xml.sax.EntityResolver JavaDoc;
61 import org.xml.sax.InputSource JavaDoc;
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 2004/11/12 10:25:56 epugh Exp $
71  */
72 public class DTDResolver implements EntityResolver JavaDoc
73 {
74     /** InputSource for database.dtd */
75     InputSource JavaDoc databaseDTD = null;
76
77     /**
78      * constructor
79      */
80     public DTDResolver()
81     {
82         try
83         {
84             InputStream JavaDoc 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 JavaDoc(dtdStream);
93             }
94         }
95         catch (Exception JavaDoc 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 JavaDoc resolveEntity(String JavaDoc publicId, String JavaDoc 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 JavaDoc getInputSource(String JavaDoc urlString)
128     {
129         try
130         {
131             URL JavaDoc url = new URL JavaDoc(urlString);
132             return new InputSource JavaDoc(url.openStream());
133         }
134         catch (IOException JavaDoc ex)
135         {
136             ex.printStackTrace();
137         }
138         return new InputSource JavaDoc();
139     }
140 }
141
142
143
144
145
146
Popular Tags