1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.zip;
24  
25  import com.liferay.portal.kernel.io.FileCacheOutputStream;
26  import com.liferay.portal.kernel.log.Log;
27  import com.liferay.portal.kernel.log.LogFactoryUtil;
28  import com.liferay.portal.kernel.util.StringPool;
29  
30  import java.io.BufferedInputStream;
31  import java.io.ByteArrayInputStream;
32  import java.io.IOException;
33  import java.io.InputStream;
34  import java.io.Serializable;
35  
36  import java.util.zip.ZipEntry;
37  import java.util.zip.ZipOutputStream;
38  
39  /**
40   * <a href="ZipWriter.java.html"><b><i>View Source</i></b></a>
41   *
42   * @author Brian Wing Shun Chan
43   *
44   */
45  public class ZipWriter implements Serializable {
46  
47      public ZipWriter() throws IOException {
48          _fcos = new FileCacheOutputStream();
49          _zos = new ZipOutputStream(_fcos);
50      }
51  
52      public void addEntry(String name, byte[] bytes) throws IOException {
53          addEntry(name, new ByteArrayInputStream(bytes));
54      }
55  
56      public void addEntry(String name, InputStream is) throws IOException {
57          if (name.startsWith(StringPool.SLASH)) {
58              name = name.substring(1);
59          }
60  
61          if (is == null) {
62              return;
63          }
64  
65          if (_log.isDebugEnabled()) {
66              _log.debug("Adding " + name);
67          }
68  
69          ZipEntry entry = new ZipEntry(name);
70  
71          _zos.putNextEntry(entry);
72  
73          BufferedInputStream bis = new BufferedInputStream(is, _BUFFER);
74  
75          int count;
76  
77          while ((count = bis.read(_data, 0, _BUFFER)) != -1) {
78              _zos.write(_data, 0, count);
79          }
80  
81          bis.close();
82  
83          _zos.closeEntry();
84      }
85  
86      public void addEntry(String name, String s) throws IOException {
87          addEntry(name, s.getBytes());
88      }
89  
90      public void addEntry(String name, StringBuilder sb) throws IOException {
91          addEntry(name, sb.toString());
92      }
93  
94      public byte[] finish() throws IOException {
95          _zos.close();
96  
97          return _fcos.getBytes();
98      }
99  
100     public FileCacheOutputStream finishWithStream() throws IOException {
101         _zos.close();
102 
103         return _fcos;
104     }
105 
106     private static final Log _log = LogFactoryUtil.getLog(ZipWriter.class);
107 
108     private static final int _BUFFER = 2048;
109 
110     private FileCacheOutputStream _fcos;
111     private ZipOutputStream _zos;
112     private byte[] _data = new byte[_BUFFER];
113 
114 }