1 /*
2 * Copyright 2005 Arnaud Prost
3 *
4 * Arnaud.prost@gmail.com
5 *
6 * This software is a computer program whose purpose is to ease the
7 * management of software project.
8 *
9 * This software is governed by the CeCILL license under French law and
10 * abiding by the rules of distribution of free software. You can use,
11 * modify and/ or redistribute the software under the terms of the CeCILL
12 * license as circulated by CEA, CNRS and INRIA at the following URL
13 * "http://www.cecill.info".
14 *
15 * As a counterpart to the access to the source code and rights to copy,
16 * modify and redistribute granted by the license, users are provided only
17 * with a limited warranty and the software's author, the holder of the
18 * economic rights, and the successive licensors have only limited
19 * liability.
20 *
21 * In this respect, the user's attention is drawn to the risks associated
22 * with loading, using, modifying and/or developing or reproducing the
23 * software by the user in light of its specific status of free software,
24 * that may mean that it is complicated to manipulate, and that also
25 * therefore means that it is reserved for developers and experienced
26 * professionals having in-depth computer knowledge. Users are therefore
27 * encouraged to load and test the software's suitability as regards their
28 * requirements in conditions enabling the security of their systems and/or
29 * data to be ensured and, more generally, to use and operate it in the
30 * same conditions as regards security.
31 *
32 * The fact that you are presently reading this means that you have had
33 * knowledge of the CeCILL license and that you accept its terms.
34 */
35
36 package net.sf.pmr.core.domain.basicProject;
37
38 import java.util.HashSet;
39 import java.util.Set;
40
41 import net.sf.pmr.keopsframework.data.DomainListMapper;
42
43 import org.aopalliance.intercept.MethodInvocation;
44 import org.springframework.aop.TargetSource;
45 import org.springframework.aop.framework.Advised;
46 import org.springframework.aop.target.SingletonTargetSource;
47
48
49 /***
50 * @author Arnaud Prost (arnaud.prost@gmail.com)
51 *
52 * réalise un lasy loading sur la liste des membres d'un projet.
53 */
54 public class GetMembersLasyLoadingInterceptor implements
55 DomainCollectionLasyLoadingInterceptor {
56
57 private DomainListMapper domainListMapper;
58
59 /***
60 * set the DomainListMapper
61 *
62 * @param domainListMapper
63 * domainListMapper
64 */
65 public void setDomainListMapper(final DomainListMapper domainListMapper) {
66 this.domainListMapper = domainListMapper;
67 }
68
69 /***
70 * @see org.aopalliance.intercept.MethodInterceptor#invoke(org.aopalliance.intercept.MethodInvocation)
71 */
72 public Object invoke(final MethodInvocation invocation) throws Throwable {
73
74 // invocation
75 Object returnValue = invocation.proceed();
76
77 // BasicProject est un proxy, il faut récupérer la target
78 BasicProject basicProject = (BasicProject) invocation.getThis();
79
80 // après invocation si l'oject est null (la collection), interrogation
81 // de la base
82 // ATTENTION : l'object doit exister en base !!!! Sinon exception hibernate. Donc l'Id doit être > à 0
83 if (returnValue == null && basicProject.getPersistanceId() > 0 ) {
84
85 returnValue = domainListMapper.findCollectionForObject(basicProject);
86
87 // la valeur de retour est donnée à l'object
88 basicProject.setMembers((Set) returnValue);
89
90 } else if (returnValue == null ){
91 // si non ne va pas chercher en base et si la collection est null, création d'une collection
92 // histoire d'éviter plus tard une NullPointerException....
93 returnValue = new HashSet();
94 basicProject.setMembers((Set) returnValue);
95 }
96
97 // sinon on ne fait rien...
98
99 return returnValue;
100
101 }
102
103 }