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Java > Open Source Codes > org > mule > providers > file > SimpleFilenameParser


1 /*
2  * $Id: SimpleFilenameParser.java 3865 2006-11-09 17:11:08Z Lajos $
3  * --------------------------------------------------------------------------------------
4  * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.com
5  *
6  * The software in this package is published under the terms of the MuleSource MPL
7  * license, a copy of which has been included with this distribution in the
8  * LICENSE.txt file.
9  */
10
11 package org.mule.providers.file;
12
13 import org.mule.umo.provider.UMOMessageAdapter;
14 import org.mule.util.DateUtils;
15 import org.mule.util.TemplateParser;
16 import org.mule.util.UUID;
17
18 import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicLong;
19
20 /**
21  * <code>SimpleFilenameParser</code> understands a limited set of tokens, namely
22  * <ul>
23  * <li>${DATE} : the currrent date in the format dd-MM-yy_HH-mm-ss.SS</li>
24  * <li>${DATE:yy-MM-dd} : the current date using the specified format</li>
25  * <li>${SYSTIME} : The current system time milliseconds</li>
26  * <li>${UUID} : A generated Universally unique id</li>
27  * <li>${ORIGINALNAME} : The origial file name if the file being written was read
28  * from another location</li>
29  * <li>${COUNT} : An incremental counter</li>
30  * <li>${<Message Property Name>} : A name of a property on the message</li>
31  * </ul>
32  * Note that square brackets can be used instead of curl brackets, this is useful
33  * when defining the file output pattern in a Mule Url endpointUri where the curl
34  * bracket is an invalid character.
35  */
36
37 public class SimpleFilenameParser implements FilenameParser
38 {
39     public static final String JavaDoc DEFAULT_DATE_FORMAT = "dd-MM-yy_HH-mm-ss.SSS";
40
41     private final TemplateParser antParser = TemplateParser.createAntStyleParser();
42     private final TemplateParser squareParser = TemplateParser.createSquareBracesStyleParser();
43
44     private final AtomicLong count = new AtomicLong(0);
45
46     public String JavaDoc getFilename(UMOMessageAdapter adapter, String JavaDoc pattern)
47     {
48         if (pattern == null)
49         {
50             return UUID.getUUID() + ".dat";
51         }
52         else
53         {
54             if (pattern.indexOf('{') > -1)
55             {
56                 return getFilename(adapter, pattern, antParser);
57             }
58             else
59             {
60                 return getFilename(adapter, pattern, squareParser);
61             }
62         }
63     }
64
65     protected String JavaDoc getFilename(final UMOMessageAdapter adapter, String JavaDoc pattern, TemplateParser parser)
66     {
67         return parser.parse(new TemplateParser.TemplateCallback()
68         {
69             public Object JavaDoc match(String JavaDoc token)
70             {
71                 if (token.equals("DATE"))
72                 {
73                     return DateUtils.getTimeStamp(DEFAULT_DATE_FORMAT);
74                 }
75                 else if (token.startsWith("DATE:"))
76                 {
77                     token = token.substring(5);
78                     return DateUtils.getTimeStamp(token);
79                 }
80                 else if (token.startsWith("UUID"))
81                 {
82                     return UUID.getUUID();
83                 }
84                 else if (token.startsWith("SYSTIME"))
85                 {
86                     return String.valueOf(System.currentTimeMillis());
87                 }
88                 else if (token.startsWith("COUNT"))
89                 {
90                     return String.valueOf(count.getAndIncrement());
91                 }
92                 else if (adapter != null)
93                 {
94                     if (token.startsWith("ORIGINALNAME"))
95                     {
96                         return adapter.getStringProperty(FileConnector.PROPERTY_ORIGINAL_FILENAME, null);
97                     }
98                     else
99                     {
100                         return adapter.getStringProperty(token, null);
101                     }
102                 }
103                 return null;
104
105             }
106         }, pattern);
107     }
108 }
109
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