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16
31 package org.apache.commons.vfs.provider.jar;
32
33 import org.apache.commons.vfs.FileName;
34 import org.apache.commons.vfs.FileObject;
35 import org.apache.commons.vfs.FileSystemException;
36 import org.apache.commons.vfs.FileSystemOptions;
37 import org.apache.commons.vfs.provider.zip.ZipFileObject;
38 import org.apache.commons.vfs.provider.zip.ZipFileSystem;
39
40 import java.io.File  ;
41 import java.io.IOException ;
42 import java.util.Collection ;
43 import java.util.jar.Attributes ;
44 import java.util.jar.Attributes.Name;
45 import java.util.jar.JarFile ;
46 import java.util.jar.Manifest ;
47 import java.util.zip.ZipEntry ;
48 import java.util.zip.ZipFile ;
49
50
55 public class JarFileSystem
56 extends ZipFileSystem
57 {
58 private Attributes attributes;
59
60 protected JarFileSystem(final FileName rootName,
61 final FileObject file,
62 final FileSystemOptions fileSystemOptions) throws FileSystemException
63 {
64 super(rootName, file, fileSystemOptions);
65 }
66
67 protected ZipFile createZipFile(File file) throws FileSystemException
68 {
69 try
70 {
71 return new JarFile (file);
72 }
73 catch (IOException ioe)
74 {
75 throw new FileSystemException("vfs.provider.jar/open-jar-file.error", file, ioe);
76 }
77 }
78
79 protected ZipFileObject createZipFileObject(FileName name,
80 ZipEntry entry) throws FileSystemException
81 {
82 return new JarFileObject(name, entry, this, true);
83 }
84
85
88 protected void addCapabilities(final Collection caps)
89 {
90 caps.addAll(JarFileProvider.capabilities);
92 }
93
94 Attributes getAttributes() throws IOException
95 {
96 if (attributes == null)
97 {
98 final Manifest man = ((JarFile ) getZipFile()).getManifest();
99 if (man == null)
100 {
101 attributes = new Attributes (1);
102 }
103 else
104 {
105 attributes = man.getMainAttributes();
106 if (attributes == null)
107 {
108 attributes = new Attributes (1);
109 }
110 }
111 }
112
113 return attributes;
114 }
115
116 Object getAttribute(Name attrName)
117 throws FileSystemException
118 {
119 try
120 {
121 final Attributes attr = getAttributes();
122 final String value = attr.getValue(attrName);
123 return value;
124 }
125 catch (IOException ioe)
126 {
127 throw new FileSystemException(attrName.toString(), ioe);
128 }
129 }
130
131 Name lookupName(String attrName)
132 {
133 if (Name.CLASS_PATH.equals(attrName))
134 {
135 return Name.CLASS_PATH;
136 }
137 else if (Name.CONTENT_TYPE.equals(attrName))
138 {
139 return Name.CONTENT_TYPE;
140 }
141 else if (Name.EXTENSION_INSTALLATION.equals(attrName))
142 {
143 return Name.EXTENSION_INSTALLATION;
144 }
145 else if (Name.EXTENSION_LIST.equals(attrName))
146 {
147 return Name.EXTENSION_LIST;
148 }
149 else if (Name.EXTENSION_NAME.equals(attrName))
150 {
151 return Name.EXTENSION_NAME;
152 }
153 else if (Name.IMPLEMENTATION_TITLE.equals(attrName))
154 {
155 return Name.IMPLEMENTATION_TITLE;
156 }
157 else if (Name.IMPLEMENTATION_URL.equals(attrName))
158 {
159 return Name.IMPLEMENTATION_URL;
160 }
161 else if (Name.IMPLEMENTATION_VENDOR.equals(attrName))
162 {
163 return Name.IMPLEMENTATION_VENDOR;
164 }
165 else if (Name.IMPLEMENTATION_VENDOR_ID.equals(attrName))
166 {
167 return Name.IMPLEMENTATION_VENDOR_ID;
168 }
169 else if (Name.IMPLEMENTATION_VERSION.equals(attrName))
170 {
171 return Name.IMPLEMENTATION_VENDOR;
172 }
173 else if (Name.MAIN_CLASS.equals(attrName))
174 {
175 return Name.MAIN_CLASS;
176 }
177 else if (Name.MANIFEST_VERSION.equals(attrName))
178 {
179 return Name.MANIFEST_VERSION;
180 }
181 else if (Name.SEALED.equals(attrName))
182 {
183 return Name.SEALED;
184 }
185 else if (Name.SIGNATURE_VERSION.equals(attrName))
186 {
187 return Name.SIGNATURE_VERSION;
188 }
189 else if (Name.SPECIFICATION_TITLE.equals(attrName))
190 {
191 return Name.SPECIFICATION_TITLE;
192 }
193 else if (Name.SPECIFICATION_VENDOR.equals(attrName))
194 {
195 return Name.SPECIFICATION_VENDOR;
196 }
197 else if (Name.SPECIFICATION_VERSION.equals(attrName))
198 {
199 return Name.SPECIFICATION_VERSION;
200 }
201 else
202 {
203 return new Name(attrName);
204 }
205 }
206
207
211 public Object getAttribute(String attrName) throws FileSystemException
212 {
213 final Name name = lookupName(attrName);
214 return getAttribute(name);
215 }
216
217
218 protected ZipFile getZipFile() throws FileSystemException
219 {
220 return super.getZipFile();
221 }
222 }
223 |
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