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org.apache.jetspeed.util.JarHelper	0%	0%

1		/*
2		* Licensed to the Apache Software Foundation (ASF) under one or more
3		* contributor license agreements. See the NOTICE file distributed with
4		* this work for additional information regarding copyright ownership.
5		* The ASF licenses this file to You under the Apache License, Version 2.0
6		* (the "License"); you may not use this file except in compliance with
7		* the License. You may obtain a copy of the License at
8		*
9		* http://www.apache.org/licenses/LICENSE-2.0
10		*
11		* Unless required by applicable law or agreed to in writing, software
12		* distributed under the License is distributed on an "AS IS" BASIS,
13		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14		* See the License for the specific language governing permissions and
15		* limitations under the License.
16		*/
17		package org.apache.jetspeed.util;
18
19		import java.io.File;
20		import java.io.FileFilter;
21		import java.io.FileNotFoundException;
22		import java.io.FileOutputStream;
23		import java.io.IOException;
24		import java.io.InputStream;
25		import java.io.OutputStream;
26		import java.util.Enumeration;
27		import java.util.jar.JarEntry;
28		import java.util.jar.JarFile;
29
30		/**
31		* @author <a href="mailto:weaver@apache.org">Scott T. Weaver </a>
32		*
33		* Creates a a temp directory to which a JarFile is expanded and can be
34		* manipulated. All operations are performed by an internal instance of
35		* {@link DirectoryHelper}.
36		*
37		*/
38		public class JarHelper
39		extends
40		AbstractFileSystemHelper
41		implements
42		FileSystemHelper
43		{
44		protected JarFile jarFile;
45		protected DirectoryHelper dirHelper;
46		protected File file;
47		private boolean deleteOnClose;
48		protected File jarRoot;
49
50		/**
51		*
52		* @param jarFile
53		* @throws IOException
54		*/
55		public JarHelper( File file, boolean deleteOnClose ) throws IOException
56	0	{
57	0	this.jarFile = new JarFile(file);
58	0	this.deleteOnClose = deleteOnClose;
59	0	this.file = file;
60	0	String tmpDirPath = System.getProperty("java.io.tmpdir");
61	0	File tmpDir = new File(tmpDirPath);
62	0	jarRoot = null;
63
64	0	jarRoot = new File(tmpDir, "jetspeed-jar-tmp/" + file.getName());
65
66	0	if (!jarRoot.exists())
67		{
68	0	jarRoot.mkdirs();
69		}
70	0	jarRoot.deleteOnExit();
71
72	0	Enumeration entries = this.jarFile.entries();
73	0	while (entries.hasMoreElements())
74		{
75	0	JarEntry jarEntry = (JarEntry) entries.nextElement();
76	0	String name = jarEntry.getName();
77	0	if (jarEntry.isDirectory())
78		{
79	0	File newDir = new File(jarRoot, name);
80	0	newDir.mkdir();
81	0	newDir.deleteOnExit();
82	0	}
83		else
84		{
85	0	copyEntryToFile(jarFile, jarRoot, jarEntry);
86		}
87	0	}
88
89	0	dirHelper = new DirectoryHelper(jarRoot);
90	0	}
91
92		/**
93		* <p>
94		* copyEntryToFile
95		* </p>
96		*
97		* @param jarFile
98		* @param jarRoot
99		* @param jarEntry
100		* @throws IOException
101		* @throws FileNotFoundException
102		*/
103		protected void copyEntryToFile( JarFile jarFile, File jarRoot, JarEntry jarEntry ) throws IOException,
104		FileNotFoundException
105		{
106	0	String name = jarEntry.getName();
107	0	File file = new File(jarRoot, name);
108	0	if (!file.getParentFile().exists())
109		{
110	0	file.getParentFile().mkdirs();
111	0	file.getParentFile().deleteOnExit();
112		}
113	0	file.createNewFile();
114	0	file.deleteOnExit();
115
116	0	InputStream is = null;
117	0	OutputStream os = null;
118		try
119		{
120	0	is = jarFile.getInputStream(jarEntry);
121	0	os = new FileOutputStream(file);
122
123	0	byte[] buf = new byte[1024];
124		int len;
125	0	while ((len = is.read(buf)) > 0)
126		{
127	0	os.write(buf, 0, len);
128		}
129
130		}
131		finally
132		{
133	0	if (is != null)
134		{
135	0	is.close();
136		}
137
138	0	if (os != null)
139		{
140	0	os.close();
141		}
142		}
143	0	}
144
145		/**
146		* <p>
147		* copyFrom
148		* </p>
149		*
150		* @param directory
151		* @param fileFilter
152		* @throws IOException
153		*/
154		public void copyFrom( File directory, FileFilter fileFilter ) throws IOException
155		{
156	0	dirHelper.copyFrom(directory, fileFilter);
157	0	}
158		/**
159		* <p>
160		* copyFrom
161		* </p>
162		*
163		* @see org.apache.jetspeed.util.FileSystemHelper#copyFrom(java.io.File)
164		* @param directory
165		* @throws IOException
166		*/
167		public void copyFrom( File directory ) throws IOException
168		{
169	0	dirHelper.copyFrom(directory);
170	0	}
171
172		/**
173		* <p>
174		* getRootDirectory
175		* </p>
176		*
177		* @see org.apache.jetspeed.util.FileSystemHelper#getRootDirectory()
178		* @return
179		*/
180		public File getRootDirectory()
181		{
182	0	return dirHelper.getRootDirectory();
183		}
184
185		/**
186		* <p>
187		* remove
188		* </p>
189		*
190		* @see org.apache.jetspeed.util.FileSystemHelper#remove()
191		* @return
192		*/
193		public boolean remove()
194		{
195	0	return dirHelper.remove();
196		}
197
198		/**
199		* <p>
200		* close
201		* </p>
202		*
203		* @throws IOException
204		*
205		* @see org.apache.jetspeed.util.FileSystemHelper#close()
206		*
207		*/
208		public void close() throws IOException
209		{
210	0	jarFile.close();
211	0	if (deleteOnClose)
212		{
213		// remove all temporary files
214	0	dirHelper.remove();
215		}
216
217	0	dirHelper.close();
218	0	}
219
220		/**
221		* <p>
222		* getSourcePath
223		* </p>
224		*
225		* @see org.apache.jetspeed.util.FileSystemHelper#getSourcePath()
226		* @return
227		*/
228		public String getSourcePath()
229		{
230	0	return file.getAbsolutePath();
231		}
232		}

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