01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: *
23: * Free Software Foundation, Inc.
24: * 59 Temple Place, Suite 330
25: * Boston, MA 02111-1307 USA
26: *
27: * @author Nam Nguyen
28: */
29:
30: package com.caucho.quercus.lib.zip;
31:
32: import com.caucho.quercus.lib.file.BinaryInput;
33: import com.caucho.quercus.lib.file.ReadStreamInput;
34: import com.caucho.quercus.env.Env;
35: import com.caucho.vfs.*;
36: import com.caucho.util.L10N;
37:
38: import java.io.IOException;
39: import java.util.zip.ZipEntry;
40: import java.util.zip.ZipInputStream;
41:
42: /**
43: * Input from a compressed stream.
44: */
45: public class ZipEntryInputStream extends ReadStreamInput {
46: private static final L10N L = new L10N(ZipEntryInputStream.class);
47:
48: private final BinaryInput _in;
49: private final long _position;
50:
51: public ZipEntryInputStream(BinaryInput in, long position)
52: throws IOException {
53: super (Env.getInstance());
54:
55: _in = in;
56: _position = position;
57:
58: in.setPosition(_position);
59:
60: ZipInputStream zipInputStream = new ZipInputStream(in
61: .getInputStream());
62:
63: ZipEntry curEntry = zipInputStream.getNextEntry();
64:
65: if (curEntry == null)
66: throw new IOException(L.l(
67: "ZipEntry at position {0} not found", _position));
68:
69: init(new ReadStream(new VfsStream(zipInputStream, null)));
70: }
71:
72: /**
73: * Opens a copy.
74: */
75: public BinaryInput openCopy() throws IOException {
76: return new ZipEntryInputStream(_in.openCopy(), _position);
77: }
78:
79: public String toString() {
80: return "ZipEntryInputStream[]";
81: }
82: }
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