01: /*
02: *
03: *
04: * Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: */
26:
27: package com.sun.perseus.platform;
28:
29: /**
30: * This class is used to provide URL resolution.
31: *
32: * @version $Id: URLResolver.java,v 1.4 2006/04/21 06:34:48 st125089 Exp $
33: */
34: public class URLResolver {
35: /**
36: * @param contect the context URL string, also called the base URL.
37: * @param spec the URL specification. May be a relative URL.
38: * @return an absolute URL value.
39: * @throws IllegalArgumentException if an absolute URL cannot be computed.
40: */
41: public static String resolve(String context, String spec)
42: throws IllegalArgumentException {
43:
44: try {
45: if (context != null) {
46: return (new PURL(new PURL(context), spec)).toString();
47: } else {
48: // We are dealing with a URL and we do not have a base
49: // URI. Check if there is any protocol specified. If there is,
50: // then we use the URL class to make the URL absolute. Otherwise,
51: // we simply return the relative URL.
52: if (spec.indexOf(':') != -1) {
53: return (new PURL(spec)).toString();
54: } else {
55: return spec;
56: }
57: }
58: } catch (Error e) {
59: e.printStackTrace();
60: throw new IllegalArgumentException();
61: }
62: }
63: }
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