CDIXMLFilePersistentObjectRepository


1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *   http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed  under the  License is distributed on an "AS IS" BASIS,
13   * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
14   * implied.
15   *
16   * See the License for the specific language governing permissions and
17   * limitations under the License.
18   */
19  
20  package org.apache.avalon.cornerstone.blocks.masterstore.xml;
21  
22  import org.apache.avalon.cornerstone.blocks.masterstore.AbstractFileRepository;
23  import org.apache.avalon.cornerstone.blocks.masterstore.ExtensionFileFilter;
24  import org.apache.avalon.cornerstone.blocks.masterstore.FileRepositoryMonitor;
25  import org.apache.avalon.cornerstone.blocks.masterstore.RepositoryManager;
26  import org.apache.avalon.cornerstone.blocks.masterstore.ObjectRespositoryConfig;
27  import org.apache.avalon.cornerstone.services.store.ObjectRepository;
28  
29  import java.io.File  ;
30  import java.io.IOException  ;
31  
32  /**
33   * This is a simple implementation of persistent object store using
34   * XML serialization from JDK 1.4 to a file system.
35   *
36   * This implementation of ObjectRepository comes with the following warning:
37   * "XMLEncoder provides suitable persistence delegates
38   * for all public subclasses of java.awt.Component in J2SE and the types of
39   * all of their properties, recursively. All other classes will be handled
40   * with the default persistence delegate which assumes the class follows
41   * the beans conventions" (snipped from the BugParade)
42   *
43   * Basically, don't use this block for anything other than Swing component
44   * serialization.  Sun will have to do a lot of work writing a
45   * "PersistenceDelegate" to handle other JDK types let alone custom classes.
46   *
47   * @author <a HREF="mailto:paul_hammant@yahoo.com">Paul Hammant</a>
48   * @author <a HREF="mailto:stefano@apache.org">Stefano Mazzocchi</a>
49   * @author <a HREF="mailto:fede@apache.org">Federico Barbieri</a>
50   */
51  public class CDIXMLFilePersistentObjectRepository
52      extends AbstractXMLFilePersistentObjectRepository
53      implements ObjectRepository
54  {
55  
56      public CDIXMLFilePersistentObjectRepository(FileRepositoryMonitor monitor, ObjectRespositoryConfig config) throws IOException   {
57          m_baseDirectory = config.getBaseDirectory();
58          this.monitor = monitor;
59  
60          setDestination( config.getURL() );
61  
62          monitor.initialized(CDIXMLFilePersistentObjectRepository.class);
63  
64          m_name = RepositoryManager.getName();
65          m_extension = "." + m_name + getExtensionDecorator();
66          m_filter = new ExtensionFileFilter( m_extension );
67  
68          final File   directory = new File  ( m_path );
69          directory.mkdirs();
70  
71          monitor.pathOpened(CDIXMLFilePersistentObjectRepository.class, m_path);
72  
73      }
74  
75      protected void initializeChild(AbstractFileRepository child) throws Exception   {
76      }
77  
78  }
79
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