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1   /*
2    * Copyright 2000-2005 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.portals.graffito.jcr.persistence.objectconverter.impl;
18  
19  import javax.jcr.Node;
20  import javax.jcr.RepositoryException;
21  import javax.jcr.Session;
22  
23  import net.sf.cglib.proxy.Enhancer;
24  import net.sf.cglib.proxy.LazyLoader;
25  
26  import org.apache.commons.logging.Log;
27  import org.apache.commons.logging.LogFactory;
28  import org.apache.portals.graffito.jcr.mapper.model.CollectionDescriptor;
29  import org.apache.portals.graffito.jcr.persistence.collectionconverter.CollectionConverter;
30  import org.apache.portals.graffito.jcr.persistence.collectionconverter.ManageableCollection;
31  import org.apache.portals.graffito.jcr.persistence.collectionconverter.ManageableCollectionUtil;
32  import org.apache.portals.graffito.jcr.persistence.objectconverter.ObjectConverter;
33  
34  public class ProxyManager {
35  
36  	 private final static Log log = LogFactory.getLog(ProxyManager.class);
37  	
38  	 
39  	public  Object createBeanProxy(Session session, ObjectConverter objectConverter,  Class beanClass, String path) 
40  	{
41  		
42         try {
43  			if (!session.itemExists(path)) {
44  				return null;
45  			}
46  		} catch (RepositoryException e) {
47  			throw new org.apache.portals.graffito.jcr.exception.RepositoryException(	"Impossible to check,if the object exits on " + path, e);
48  		}
49  				
50  		LazyLoader loader = new BeanLazyLoader(objectConverter, session, beanClass, path) ;		
51  		return  Enhancer.create(beanClass, loader);
52  	}
53  
54  	
55  	public  Object createCollectionProxy(Session session, CollectionConverter collectionConverter, Node parentNode,  CollectionDescriptor collectionDescriptor, Class collectionFieldClass) 
56  	{	
57  		
58  		if (collectionConverter.isNull(session, parentNode, collectionDescriptor, collectionFieldClass)) 	{
59  			return null;
60  		}
61  		
62  		ManageableCollection manageableCollection = ManageableCollectionUtil.getManageableCollection(collectionFieldClass);
63  		
64  		LazyLoader loader = new CollectionLazyLoader(collectionConverter, session, parentNode, collectionDescriptor, collectionFieldClass);
65  		return  Enhancer.create(manageableCollection.getClass(), loader);
66  	}	
67  }