01: /*
02: * ProGuard -- shrinking, optimization, obfuscation, and preverification
03: * of Java bytecode.
04: *
05: * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
06: *
07: * This program is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU General Public License as published by the Free
09: * Software Foundation; either version 2 of the License, or (at your option)
10: * any later version.
11: *
12: * This program is distributed in the hope that it will be useful, but WITHOUT
13: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15: * more details.
16: *
17: * You should have received a copy of the GNU General Public License along
18: * with this program; if not, write to the Free Software Foundation, Inc.,
19: * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20: */
21: package proguard.io;
22:
23: import java.io.IOException;
24: import java.util.zip.*;
25:
26: /**
27: * This DataEntryReader lets a given DataEntryReader read all data entries of
28: * the read jar/war/zip data entries.
29: *
30: * @author Eric Lafortune
31: */
32: public class JarReader implements DataEntryReader {
33: private final DataEntryReader dataEntryReader;
34:
35: /**
36: * Creates a new JarReader.
37: */
38: public JarReader(DataEntryReader dataEntryReader) {
39: this .dataEntryReader = dataEntryReader;
40: }
41:
42: // Implementation for DataEntryReader.
43:
44: public void read(DataEntry dataEntry) throws IOException {
45: ZipInputStream zipInputStream = new ZipInputStream(dataEntry
46: .getInputStream());
47:
48: try {
49: // Get all entries from the input jar.
50: while (true) {
51: // Can we get another entry?
52: ZipEntry zipEntry = zipInputStream.getNextEntry();
53: if (zipEntry == null) {
54: break;
55: }
56:
57: if (!zipEntry.isDirectory()) {
58: // Delegate the actual reading to the data entry reader.
59: dataEntryReader.read(new ZipDataEntry(dataEntry,
60: zipEntry, zipInputStream));
61: }
62: }
63: } finally {
64: dataEntry.closeInputStream();
65: }
66: }
67: }
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