1 /**
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Intalio, Inc. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Intalio, Inc. Exolab is a registered
23 * trademark of Intalio, Inc.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * INTALIO, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2002 (C) Intalio, Inc. All Rights Reserved.
42 *
43 * $Id$
44 */
45 package org.exolab.castor.net.util;
46
47 import org.exolab.castor.net.URILocation;
48 import java.io.*;
49
50 /**
51 * An implementation of URILocation
52 *
53 * @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
54 * @version $Revision$ $Date: 2005-03-05 06:42:06 -0700 (Sat, 05 Mar 2005) $
55 **/
56 public final class URILocationImpl extends URILocation {
57
58 private String _documentBase = null;
59 private String _absoluteURI = null;
60 private String _relativeURI = null;
61
62
63 private Reader _reader = null;
64 private InputStream _is = null;
65
66
67 /**
68 * Creates a new URILocationImpl
69 **/
70 public URILocationImpl(String href) {
71 this(href, null);
72 } //-- URILocationImpl
73
74 /**
75 * Creates a new URILocationImpl
76 **/
77 public URILocationImpl(String href, String documentBase) {
78 if (href == null)
79 throw new IllegalStateException("href must not be null");
80 _absoluteURI = URIUtils.resolveAsString(href, documentBase);
81 } //-- URILocationImpl
82
83
84 /**
85 * Creates a new URILocationImpl
86 **/
87 public URILocationImpl(Reader reader, String href) {
88 this(href, null);
89 _reader = reader;
90 } //-- URILocationImpl
91
92 /**
93 * Creates a new URILocationImpl
94 **/
95 public URILocationImpl(InputStream is, String href) {
96 this(href, null);
97 _is = is;
98 } //-- URILocationImpl
99
100
101
102 /**
103 * Returns the absolute URI for this URILocation
104 *
105 * @return the absolute URI for this URILocation
106 * @see #getRelativeURI
107 * @see #getBaseURI
108 **/
109 public String getAbsoluteURI() {
110 return _absoluteURI;
111 } //-- getAbsoluteURI
112
113 /**
114 * Returns the base location of this URILocation.
115 * If this URILocation is an URL, the base location
116 * will be equivalent to the document base for the URL.
117 *
118 * @return the base location of this URILocation
119 * @see #getAbsoluteURI
120 * @see #getRelativeURI
121 **/
122 public String getBaseURI() {
123 if (_documentBase == null)
124 _documentBase = URIUtils.getDocumentBase(_absoluteURI);
125 return _documentBase;
126 } //-- getBaseURI
127
128 /**
129 * Returns a Reader for the resource represented
130 * by this URILocation.
131 *
132 * @return a Reader for the resource represented by
133 * this URILocation
134 * @exception java.io.FileNotFoundException
135 * @exception java.io.IOException
136 **/
137 public Reader getReader() throws java.io.IOException {
138
139 if (_reader != null)
140 return _reader;
141 if (_is != null)
142 return new InputStreamReader(_is);
143
144 return URIUtils.getReader(_absoluteURI, null);
145 } //-- getReader
146
147 /**
148 * Returns the relative URI for this URILocation
149 *
150 * @return the relative URI for this URILocation
151 * @see #getAbsoluteURI
152 * @see #getBaseURI
153 **/
154 public String getRelativeURI() {
155
156 if (_relativeURI == null) {
157 int idx = getBaseURI().length();
158 _relativeURI = _absoluteURI.substring(idx);
159 }
160
161 return _relativeURI;
162
163 } //-- getRelativeURI
164
165 /**
166 * Returns the String representation of
167 * this URILocation.
168 *
169 * @return the String representation of this URILocation
170 **/
171 public String toString() {
172 return getAbsoluteURI();
173 }
174
175 } //-- URILocationImpl