1 /* ====================================================================
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2000 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>;.
53 *
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
57 */
58
59 package net.sourceforge.jane;
60
61 import java.io.File;
62 import java.io.IOException;
63 import java.io.InputStream;
64 import java.util.zip.ZipEntry;
65 import java.util.zip.ZipFile;
66
67 /***
68 * An {@link ArtifactPath} that represents a path to a JAR.
69 *
70 * @author Calvin Yu
71 */
72 public class JarArtifactPath extends ArtifactPath
73 {
74
75 /***
76 * Create a new <code>JarArtifactPath</code>.
77 */
78 public JarArtifactPath(String aPath)
79 throws InvalidPathException
80 {
81 super(aPath);
82 if (!new File(aPath).exists()) {
83 throw new InvalidPathException(aPath);
84 }
85 }
86
87 /***
88 * Returns the path to the given artifact.
89 */
90 public String getPathToArtifact(String name)
91 {
92 ZipFile zip = null;
93 try {
94 zip = getZipFile();
95 ZipEntry entry = zip.getEntry(name);
96 if (entry == null) {
97 return null;
98 }
99 return zip.getName() + "!/" + entry.getName();
100
101 } catch (IOException e) {
102 // TODO: Log
103 return null;
104
105 } finally {
106 close(zip);
107 }
108 }
109
110 /***
111 * Find the specified artifact.
112 *
113 * @task Figure out how to go about closing the zip file.
114 */
115 public InputStream findArtifact(String name)
116 throws IOException
117 {
118 ZipFile zip = getZipFile();
119 ZipEntry entry = zip.getEntry(name);
120 if (entry == null) {
121 return null;
122 }
123 return zip.getInputStream(entry);
124 }
125
126 /***
127 * Attempt to close the given zip file.
128 */
129 private static void close(ZipFile zip)
130 {
131 if (zip != null) {
132 try {
133 zip.close();
134 } catch (IOException e) {
135 // TODO: Log.
136 }
137 }
138 }
139
140 /***
141 * Returns the zip file.
142 */
143 private ZipFile getZipFile()
144 throws IOException
145 {
146 return new ZipFile(path);
147 }
148
149 }
150
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