1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2014 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 proguard.classfile.*;
24import proguard.classfile.io.ProgramClassWriter;
25import proguard.classfile.util.SimplifiedVisitor;
26import proguard.classfile.visitor.ClassVisitor;
27
28import java.io.*;
29
30/**
31 * This ClassVisitor writes out the ProgramClass objects that it visits to the
32 * given DataEntry, modified to have the correct name.
33 *
34 * @author Eric Lafortune
35 */
36public class DataEntryClassWriter
37extends      SimplifiedVisitor
38implements   ClassVisitor
39{
40    private final DataEntryWriter dataEntryWriter;
41    private final DataEntry       templateDataEntry;
42
43
44    /**
45     * Creates a new DataEntryClassWriter for writing to the given
46     * DataEntryWriter, based on the given template DataEntry.
47     */
48    public DataEntryClassWriter(DataEntryWriter dataEntryWriter,
49                                DataEntry       templateDataEntry)
50    {
51        this.dataEntryWriter   = dataEntryWriter;
52        this.templateDataEntry = templateDataEntry;
53    }
54
55
56    // Implementations for ClassVisitor.
57
58    public void visitProgramClass(ProgramClass programClass)
59    {
60        // Rename the data entry if necessary.
61        String    actualClassName = programClass.getName();
62        DataEntry actualDataEntry =
63            new RenamedDataEntry(templateDataEntry,
64                                 actualClassName + ClassConstants.CLASS_FILE_EXTENSION);
65
66        try
67        {
68            // Get the output entry corresponding to this input entry.
69            OutputStream outputStream = dataEntryWriter.getOutputStream(actualDataEntry);
70            if (outputStream != null)
71            {
72                // Write the class to the output entry.
73                DataOutputStream classOutputStream = new DataOutputStream(outputStream);
74
75                new ProgramClassWriter(classOutputStream).visitProgramClass(programClass);
76
77                classOutputStream.flush();
78            }
79        }
80        catch (IOException e)
81        {
82            throw new RuntimeException("Can't write program class ["+actualClassName+"] to ["+actualDataEntry+"] ("+e.getMessage()+")", e);
83        }
84    }
85}
86