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1   /*
2    * Copyright 2000-2001,2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.jetspeed.util;
18  
19  
20  /***
21  
22  <p>Utility class for declaring MIME types to use for various requests and provide
23  utility manipulation methods.</p>
24  <p>Added Content-Encoding capability, with defaults
25  
26  @author <a href="mailto:raphael@apache.org">Raphaël Luta</a>
27  @author <a href="mailto:sgala@apache.org">Santiago Gala</a>
28  @version $Id: MimeType.java,v 1.8 2004/02/23 03:23:42 jford Exp $
29  */
30  public class MimeType {
31  
32      public static final MimeType HTML  = new MimeType( "text/html", "UTF-8" ); //FIXME: test
33      public static final MimeType XHTML = new MimeType( "text/xhtml" );
34      public static final MimeType WML   = new MimeType( "text/vnd.wap.wml" );
35      public static final MimeType XML   = new MimeType( "text/xml" );
36      public static final MimeType VXML  = new MimeType( "text/vxml" );
37      
38      /***
39       * Standard ContentType String, with no encoding appended.
40       */
41      private String mimeType = "";
42      /***
43       * null value means default encoding.
44       * Otherwise, charset to be used.
45       */
46      private String charSet = null;
47      
48      public MimeType( String mimeType ) {
49          if(mimeType == null) {
50              throw new NullPointerException();
51          }
52          this.mimeType = mimeType;
53      }
54      
55      /***
56       *
57       */
58      public MimeType( String mimeType, String charSet ) {
59          if(mimeType == null) {
60              throw new NullPointerException();
61          }
62          this.mimeType = mimeType;
63          this.charSet = charSet;
64      }
65      
66      /*** Extracts from this MimeType a user-friendly identifying code 
67        * ie "html" for "text/html" or "wml" for "text/vnd.wap.wml"
68        *
69        * @param mime the type to simplify
70        * @return the simplified type
71        */
72      public String getCode() {
73          String type = this.mimeType;
74          // get everything after "/"
75          type = type.substring(type.indexOf("/")+1);
76          // remove any dot in the name
77          int idx = type.lastIndexOf(".");
78          if (idx >= 0 ) {
79              type = type.substring(idx+1);
80          }
81          //remove anything before a "-"
82          idx = type.lastIndexOf("-");
83          if (idx >= 0 ) {
84              type = type.substring(idx+1);
85          }
86          
87          return type.toLowerCase();
88      }
89  
90      /***
91      Return the media type associated
92      */
93      public String getContentType()
94      {
95          return this.mimeType;
96      }
97  
98      /***
99      Return the character encoding associated, if any
100     */
101     public String getCharSet()
102     {
103         return this.charSet;
104     }
105 
106     /***
107     Convert this MimeType to its external String representation
108     */
109     public String toString()
110     {
111         if( null == this.charSet )
112         {
113             return this.mimeType;
114         }
115         return this.mimeType +
116             "; charset=" +
117             this.charSet;
118     }
119 
120     /***
121     Compare one MimeType to another
122     */
123     public boolean equals( Object obj ) {
124         if ( this == obj) {
125             return true;
126         }
127         
128         if (obj instanceof MimeType) {
129             MimeType comp = (MimeType)obj;
130             return this.toString().equals( comp.toString() );
131         } else {
132             return false;
133         }
134     }
135     
136 }