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Java > Open Source Codes > com > quadcap > io > dir > Directory


1 package com.quadcap.io.dir;
2
3 /* Copyright 2000 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.File JavaDoc;
42 import java.io.IOException JavaDoc;
43
44 import java.util.Enumeration JavaDoc;
45
46 import java.net.MalformedURLException JavaDoc;
47 import java.net.URL JavaDoc;
48
49 /**
50  * Read-only directory abstract interface.
51  *
52  * @author Stan Bailes
53  */
54 public abstract class Directory {
55     public abstract Enumeration JavaDoc entries();
56     public abstract Entry getEntry(String JavaDoc name);
57     public abstract URL JavaDoc getURL(String JavaDoc name) throws MalformedURLException JavaDoc;
58     public abstract String JavaDoc getRealPath(String JavaDoc name);
59     public abstract String JavaDoc getRootPath();
60     public abstract void close() throws IOException JavaDoc;
61     public abstract boolean isFile();
62
63     public static Directory getDirectory(File JavaDoc f) throws IOException JavaDoc {
64         if (f.isDirectory()) {
65             return new FileDirectory(f);
66         } else if (f.exists()) {
67             return new JarDirectory(f);
68         } else {
69             throw new IOException JavaDoc("Can't open: " + f.getAbsolutePath());
70         }
71     }
72 }
73
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