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Java > Open Source Codes > org > jboss > aop > microcontainer > integration > AOPMetaDataContextFactory


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.aop.microcontainer.integration;
23
24 import org.jboss.metadata.spi.repository.MetaDataRepository;
25 import org.jboss.metadata.spi.repository.MutableMetaDataRepository;
26 import org.jboss.repository.plugins.basic.BasicMetaDataContextFactory;
27 import org.jboss.repository.spi.MetaDataContext;
28 import org.jboss.repository.spi.MetaDataContextFactory;
29
30 /**
31  *
32  * @author <a HREF="kabir.khan@jboss.com">Kabir Khan</a>
33  * @version $Revision: 58238 $
34  */
35 public class AOPMetaDataContextFactory extends BasicMetaDataContextFactory implements MetaDataContextFactory
36 {
37    MetaDataContextFactory delegate;
38    public MetaDataContext getMetaDataContext(ClassLoader JavaDoc beanLoader, MetaDataRepository repository, String JavaDoc beanName)
39    {
40       MetaDataContextFactory factoryDelegate = getMetaDataContextFactoryDelegate(beanLoader);
41       if (factoryDelegate == null)
42       {
43          return super.getMetaDataContext(beanLoader, repository, beanName);
44       }
45       else
46       {
47          return factoryDelegate.getMetaDataContext(beanLoader, repository, beanName);
48       }
49    }
50    
51    private synchronized MetaDataContextFactory getMetaDataContextFactoryDelegate(ClassLoader JavaDoc beanLoader)
52    {
53       if (delegate != null)
54       {
55          return delegate;
56       }
57       
58       Class JavaDoc clazz = AOPDeployedChecker.getClassIfExists(
59             beanLoader,
60             "org.jboss.aop.microcontainer.integration.AOPMetaDataContextFactoryDelegate");
61       
62       if (clazz == null)
63       {
64          return null;
65       }
66       
67       try
68       {
69          delegate = (MetaDataContextFactory)clazz.newInstance();
70       }
71       catch (Exception JavaDoc e)
72       {
73          throw new RuntimeException JavaDoc("Error instantiating AOPMetaDataContextFactoryDelegate", e);
74       }
75       
76       return delegate;
77    }
78    
79    
80 }
81
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