GZipCompressor


1   /* 
2    * This file is part of the Echo Web Application Framework (hereinafter "Echo").
3    * Copyright (C) 2002-2005 NextApp, Inc.
4    *
5    * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6    *
7    * The contents of this file are subject to the Mozilla Public License Version
8    * 1.1 (the "License"); you may not use this file except in compliance with
9    * the License. You may obtain a copy of the License at
10   * http://www.mozilla.org/MPL/
11   *
12   * Software distributed under the License is distributed on an "AS IS" basis,
13   * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14   * for the specific language governing rights and limitations under the
15   * License.
16   *
17   * Alternatively, the contents of this file may be used under the terms of
18   * either the GNU General Public License Version 2 or later (the "GPL"), or
19   * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20   * in which case the provisions of the GPL or the LGPL are applicable instead
21   * of those above. If you wish to allow use of your version of this file only
22   * under the terms of either the GPL or the LGPL, and not to allow others to
23   * use your version of this file under the terms of the MPL, indicate your
24   * decision by deleting the provisions above and replace them with the notice
25   * and other provisions required by the GPL or the LGPL. If you do not delete
26   * the provisions above, a recipient may use your version of this file under
27   * the terms of any one of the MPL, the GPL or the LGPL.
28   */
29  
30  package nextapp.echo2.webrender.util;
31  
32  import java.io.ByteArrayOutputStream  ;
33  import java.io.IOException  ;
34  import java.util.zip.GZIPOutputStream  ;
35  
36  /**
37   * Utility class for GZip compression.
38   */
39  public class GZipCompressor {
40      
41      /**
42       * Compresses a String.
43       * 
44       * @param s the String to compress
45       * @return an array of bytes containing GZip-compression output
46       * @throws IOException
47       */
48      public static byte[] compress(String   s) 
49      throws IOException   {
50          ByteArrayOutputStream   byteOut = new ByteArrayOutputStream  ();
51          GZIPOutputStream   gZipOut = new GZIPOutputStream  (byteOut);
52          gZipOut.write(s.getBytes());
53          gZipOut.finish();
54          byteOut.close();
55          return byteOut.toByteArray();
56      }
57  }
58
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