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Java > Open Source Codes > org > apache > james > mailrepository > MimeMessageAvalonSource


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2  * Copyright (c) 2000-2004 The Apache Software Foundation. *
3  * All rights reserved. *
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5  * Licensed under the Apache License, Version 2.0 (the "License"); you *
6  * may not use this file except in compliance with the License. You *
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9  * http://www.apache.org/licenses/LICENSE-2.0 *
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17
18 package org.apache.james.mailrepository;
19
20 import org.apache.avalon.cornerstone.services.store.StreamRepository;
21 import org.apache.james.core.MimeMessageSource;
22
23 import java.io.IOException JavaDoc;
24 import java.io.InputStream JavaDoc;
25
26 public class MimeMessageAvalonSource extends MimeMessageSource {
27
28     //Define how to get to the data
29

30     /**
31      * The stream repository used by this data source.
32      */

33     StreamRepository sr = null;
34
35     /**
36      * The name of the repository
37      */

38     String JavaDoc repositoryName = null;
39
40     /**
41      * The key for the particular stream in the stream repository
42      * to be used by this data source.
43      */

44     String JavaDoc key = null;
45
46     private long size = -1;
47
48     public MimeMessageAvalonSource(StreamRepository sr, String JavaDoc repositoryName, String JavaDoc key) {
49         this.sr = sr;
50         this.repositoryName = repositoryName;
51         this.key = key;
52     }
53
54     /**
55      * Returns a unique String ID that represents the location from where
56      * this source is loaded. This will be used to identify where the data
57      * is, primarily to avoid situations where this data would get overwritten.
58      *
59      * @return the String ID
60      */

61     public String JavaDoc getSourceId() {
62         StringBuffer JavaDoc sourceIdBuffer =
63             new StringBuffer JavaDoc(128)
64                     .append(repositoryName)
65                     .append("/")
66                     .append(key);
67         return sourceIdBuffer.toString();
68     }
69
70     public InputStream JavaDoc getInputStream() throws IOException JavaDoc {
71         return sr.get(key);
72     }
73
74     public long getMessageSize() throws IOException JavaDoc {
75         if (size == -1) {
76             if (sr instanceof org.apache.james.mailrepository.filepair.File_Persistent_Stream_Repository) {
77                 size = ((org.apache.james.mailrepository.filepair.File_Persistent_Stream_Repository) sr).getSize(key);
78             } else size = super.getMessageSize();
79         }
80         return size;
81     }
82 }
83
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