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Java > Open Source Codes > net > myvietnam > mvncore > web > FileUploadParserFactory


1 /*
2  * $Header: /cvsroot/mvnforum/myvietnam/src/net/myvietnam/mvncore/web/FileUploadParserFactory.java,v 1.2 2006/04/14 16:03:56 minhnn Exp $
3  * $Author: minhnn $
4  * $Revision: 1.2 $
5  * $Date: 2006/04/14 16:03:56 $
6  *
7  * ====================================================================
8  *
9  * Copyright (C) 2002-2006 by MyVietnam.net
10  *
11  * All copyright notices regarding MyVietnam and MyVietnam CoreLib
12  * MUST remain intact in the scripts and source code.
13  *
14  * This library is free software; you can redistribute it and/or
15  * modify it under the terms of the GNU Lesser General Public
16  * License as published by the Free Software Foundation; either
17  * version 2.1 of the License, or (at your option) any later version.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  *
28  * Correspondence and Marketing Questions can be sent to:
29  * info at MyVietnam net
30  *
31  * @author: Minh Nguyen
32  */
33 package net.myvietnam.mvncore.web;
34
35 import net.myvietnam.mvncore.MVNCoreConfig;
36 import net.myvietnam.mvncore.web.impl.FileUploadParserServletImpl;
37 import org.apache.commons.logging.Log;
38 import org.apache.commons.logging.LogFactory;
39
40
41 public class FileUploadParserFactory {
42
43     private static Log log = LogFactory.getLog(FileUploadParserFactory.class);
44
45     private static FileUploadParser uploadParser = null;
46
47     /**
48      * Private constructor to prevent instantiation
49      */
50     private FileUploadParserFactory() {
51     }
52
53     public static FileUploadParser getFileUploadParser() {
54
55         if (uploadParser == null) {
56             String JavaDoc uploadParserClassName = MVNCoreConfig.getUploadParserClassName();
57             try {
58                 if (uploadParserClassName.length() > 0) {
59                     Class JavaDoc urlResolverClass = Class.forName(uploadParserClassName);
60                     uploadParser = (FileUploadParser) urlResolverClass.newInstance();
61                 }
62             } catch (Throwable JavaDoc ex) {
63                 log.error("Cannot load FileUploadParser implementation (" + uploadParserClassName + ")", ex);
64             }
65
66             // fallback, now use the default implementation
67 if (uploadParser == null) {
68                 uploadParser = new FileUploadParserServletImpl();
69             }
70
71             log.info("Using FileUploadParser = " + uploadParser);
72         }
73
74         return uploadParser;
75     }
76
77 }
78
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