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 proguard.classfile.ClassConstants;
24: import proguard.util.ExtensionMatcher;
25:
26: import java.io.IOException;
27:
28: /**
29: * This DataEntryReader delegates to one of two other DataEntryReader instances,
30: * depending on the extension of the data entry.
31: *
32: * @author Eric Lafortune
33: */
34: public class ClassFilter implements DataEntryReader {
35: private final FilteredDataEntryReader filteredDataEntryReader;
36:
37: /**
38: * Creates a new ClassFilter that delegates reading classes to the
39: * given reader.
40: */
41: public ClassFilter(DataEntryReader classReader) {
42: this (classReader, null);
43: }
44:
45: /**
46: * Creates a new ClassFilter that delegates to either of the two given
47: * readers.
48: */
49: public ClassFilter(DataEntryReader classReader,
50: DataEntryReader dataEntryReader) {
51: filteredDataEntryReader = new FilteredDataEntryReader(
52: new DataEntryNameFilter(new ExtensionMatcher(
53: ClassConstants.CLASS_FILE_EXTENSION)),
54: classReader, dataEntryReader);
55: }
56:
57: // Implementations for DataEntryReader.
58:
59: public void read(DataEntry dataEntry) throws IOException {
60: filteredDataEntryReader.read(dataEntry);
61: }
62: }
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