KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > fop > tools > URLBuilder


1 /*
2  * $Id: URLBuilder.java,v 1.1.2.2 2003/02/25 15:19:57 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.tools;
52
53 import java.io.File JavaDoc;
54 import java.net.URL JavaDoc;
55 import java.net.MalformedURLException JavaDoc;
56
57 /**
58  * This utility class is used to build URLs from Strings. The String can be
59  * normal URLs but also just filenames. The filenames get converted to a
60  * file URL.
61  *
62  * @author Jeremias Maerki
63  */
64 public class URLBuilder {
65
66     /**
67      * Build an URL based on a String. The String can be a normal URL or a
68      * filename. Filenames get automatically converted to to URLs.
69      *
70      * @param spec A URL or a filename
71      * @return The requested URL
72      * @throws MalformedURLException If spec cannot be converted to a URL.
73      */
74     public static URL JavaDoc buildURL(String JavaDoc spec) throws MalformedURLException JavaDoc {
75         if (spec == null) throw new NullPointerException JavaDoc("spec must not be null");
76         File JavaDoc f = new File JavaDoc(spec);
77         if (f.exists()) {
78             return f.toURL();
79         } else {
80             URL JavaDoc u1 = new URL JavaDoc(spec);
81             return u1;
82         }
83     }
84
85
86     /**
87      * Build an URL based on a String. The String can be a normal URL or a
88      * filename. Filenames get automatically converted to to URLs.
89      *
90      * @param baseURL Base URL for relative paths
91      * @param spec A URL or a filename
92      * @return The requested URL
93      * @throws MalformedURLException If spec cannot be converted to a URL.
94      */
95     public static URL JavaDoc buildURL(URL JavaDoc baseURL, String JavaDoc spec) throws MalformedURLException JavaDoc {
96         if (spec == null) throw new NullPointerException JavaDoc("spec must not be null");
97         try {
98             URL JavaDoc u1 = buildURL(spec);
99             return u1;
100         } catch (MalformedURLException JavaDoc mfue) {
101             if (baseURL == null) throw mfue;
102             URL JavaDoc u2 = new URL JavaDoc(baseURL, spec);
103             return u2;
104         }
105     }
106
107 }
Popular Tags