MimeBodyPartDataSource


1   /***
2   * jwma Java WebMail
3   * Copyright (c) 2001 Dieter Wimberger
4   *
5   * jwma is free software; you can distribute and use this source
6   * under the terms of the BSD-style license received along with 
7   * the distribution.
8   ***/
9   package org.lucane.server.web;
10  
11  import java.io.ByteArrayInputStream  ;
12  import java.io.IOException  ;
13  import java.io.InputStream  ;
14  import java.io.OutputStream  ;
15  
16  import javax.activation.DataSource  ;
17  
18  /**
19   * Class that implements a MimeBodyPartDataSource.
20   *
21   * It implements <code>DataSource</code> for handling
22   * with the Mail API (or other JAF aware) classes.
23   *
24   * @author Dieter Wimberger
25   * @version 0.9.5 04/05/2001
26   */
27  public class MimeBodyPartDataSource 
28      implements DataSource   {
29  
30      //instance attributes
31      private String   m_Type;
32      private String   m_Name;
33      private byte[] m_Data;
34  
35      /**
36       * Constructs a <code>MimeBodyPartDataSource</code>
37       * instance.
38       * 
39       * @param type the content type of the constructed instance
40       *        as <code>String</code>.
41       * @param name the name of the constructed instance
42       *        as <code>String</code>.
43       * @param data the data of the constructed instance as
44       *        <code>byte[]</code>.
45       * 
46       * @return the newly constructed <code>MimeBodyPartDataSource
47       *         </code>.
48       */
49       public MimeBodyPartDataSource(
50          String   type, String   name,byte[] data) {
51          
52          m_Type=type;
53          m_Name=name;
54          m_Data=data;
55       }//constructore
56  
57      /**
58       * Returns the content type of this instance as
59       * <code>String</code>.
60       * <p>(DataSource implementation)
61       * 
62       * @return the content type as <code>String</code>
63       */
64       public String   getContentType(){
65          return m_Type;
66       }//getContentType
67  
68      /**
69       * Returns the name of this instance as <code>String</code>.
70       * <p>(DataSource implementation)
71       * 
72       * @return the name as <code>String</code>
73       */
74       public String   getName(){
75          return m_Name;
76       }//getName
77  
78      /**
79       * Returns the data of this instance as <code>
80       * InputStream</code>. 
81       * <p>(DataSource implementation); wraps the data
82       * into a <code>ByteArrayInputStream</code>.
83       * 
84       * @return the data of this instance as 
85       *         <code>InputStream</code>.
86       * @throws IOException if impossible.
87       */ 
88       public InputStream   getInputStream() 
89              throws IOException   {
90              
91          return new ByteArrayInputStream  (m_Data);
92       }//getInputStream
93  
94      /**
95       * Throws an IOException in this implementation, because
96       * this instance represents a read-only <code>DataSource</code>.
97       * <p>(DataSource implementation)
98       * 
99       * @return an <code>OutputStream</code> instance for writing
100      *         to this <code>DataSource</code>.
101      * @throws IOException if impossible.
102      */     
103      public OutputStream   getOutputStream() 
104             throws IOException   {
105     
106         throw new IOException  (
107             "Not supported."
108         );
109      }//getOutputStream
110 
111 }//class MimeBodyPartDataSource
112
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