MimeType


1   /******************************************************************************
2    * MimeType.java
3    * ****************************************************************************/
4   
5   /* J_LZ_COPYRIGHT_BEGIN *******************************************************
6   * Copyright 2001-2004 Laszlo Systems, Inc.  All Rights Reserved.              *
7   * Use is subject to license terms.                                            *
8   * J_LZ_COPYRIGHT_END *********************************************************/
9   
10  package org.openlaszlo.media;
11  
12  import org.openlaszlo.utils.FileUtils;
13  
14  /**
15   * A class for defining mimetypes and utilities.
16   *
17   * TODO:[2002-12-3 bloch] Someday this should be refactored for plugins
18   *
19   * @author Eric Bloch
20   * @version 1.0
21   */
22  public class MimeType {
23      public static final String   TEXT = "text/html";
24      public static final String   SWF = "application/x-shockwave-flash";
25      public static final String   JPEG = "image/jpeg";
26      public static final String   GIF = "image/gif";
27      public static final String   PNG = "image/png";
28      public static final String   MP3 = "audio/mpeg";
29      public static final String   XMP3 = "audio/x-mpeg";
30      public static final String   XML = "text/xml";
31      public static final String   HTML = "text/html";
32  
33      public static final String   UNKNOWN = "unknown";
34  
35      /**
36       * @return a mimetype string based on the extension (chars after the '.')
37       * @return <code>UNKNOWN</code> if no guess can be made
38       */
39      public static final String   fromExtension(final String   name) {
40          String   extension = FileUtils.getExtension(name);
41          if (extension == null) {
42              return UNKNOWN;
43          }
44          if (extension.equals("") ) {
45              return UNKNOWN;
46          }
47          if (extension.equalsIgnoreCase("swf")) {
48              return SWF;
49          }
50          if (extension.equalsIgnoreCase("jpg") ||
51              extension.equalsIgnoreCase("jpeg")) {
52              return JPEG;
53          }
54          if (extension.equalsIgnoreCase("gif")) {
55              return GIF;
56          }
57          if (extension.equalsIgnoreCase("png")) {
58              return PNG;
59          }
60          if (extension.equalsIgnoreCase("xml")) {
61              return XML;
62          }
63          if (extension.equalsIgnoreCase("lzx")) {
64              return XML;
65          }
66          if (extension.equalsIgnoreCase("html") ||
67              extension.equalsIgnoreCase("htm")) {
68              return HTML;
69          }
70          if (extension.equalsIgnoreCase("mp3") ||
71              extension.equalsIgnoreCase("mpeg")) {
72              return MP3;
73          }
74          return UNKNOWN;
75      }
76  
77      /**
78       * @param mimeType mimetype to give extension of
79       * @return a file type extension string based on the extension (chars after the '.').
80       * If no such mimetype is found, the mimeType string is returned.
81       */
82      public static final String   toExtension(final String   mimeType) {
83  
84          if (mimeType == MimeType.JPEG) {
85              return "jpeg";
86          }
87          if (mimeType == MimeType.SWF) {
88              return "swf";
89          }
90          if (mimeType == MimeType.GIF) {
91              return "gif";
92          }
93          if (mimeType == MimeType.PNG) {
94              return "png";
95          }
96          if (mimeType == MimeType.MP3) {
97              return "mp3";
98          }
99          if (mimeType == MimeType.XMP3) {
100             return "mp3";
101         }
102 
103         return mimeType;
104     }
105 }
106
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