ParentDataEntryWriter.java revision b72c5c2e5482cf10117b2b25f642f7616b2326c3 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * 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 */
21package proguard.io;
22
23import java.io.*;
24
25/**
26 * This DataEntryWriter lets another DataEntryWriter write the parent data
27 * entries.
28 *
29 * @author Eric Lafortune
30 */
31public class ParentDataEntryWriter implements DataEntryWriter
32{
33    private DataEntryWriter dataEntryWriter;
34
35
36    /**
37     * Creates a new ParentDataEntryWriter.
38     * @param dataEntryWriter the DataEntryWriter to which the writing will be
39     *                        delegated, passing the data entries' parents.
40     */
41    public ParentDataEntryWriter(DataEntryWriter dataEntryWriter)
42    {
43        this.dataEntryWriter = dataEntryWriter;
44    }
45
46
47    // Implementations for DataEntryWriter.
48
49
50    public boolean createDirectory(DataEntry dataEntry) throws IOException
51    {
52        return getOutputStream(dataEntry) != null;
53    }
54
55
56    public OutputStream getOutputStream(DataEntry dataEntry) throws IOException
57    {
58        return getOutputStream(dataEntry, null);
59    }
60
61
62    public OutputStream getOutputStream(DataEntry dataEntry,
63                                        Finisher  finisher) throws IOException
64    {
65        return dataEntryWriter.getOutputStream(dataEntry.getParent(),
66                                               finisher);
67    }
68
69
70    public void close() throws IOException
71    {
72        dataEntryWriter.close();
73        dataEntryWriter = null;
74    }
75}
76