AnonymousPersistentFieldHelper


1   package org.apache.ojb.broker.metadata.fieldaccess;
2   
3   /* Copyright 2003-2004 The Apache Software Foundation
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * 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 implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  import java.util.Iterator  ;
19  import java.util.Map  ;
20  import java.util.Vector  ;
21  
22  import org.apache.ojb.broker.metadata.AnonymousFieldDescriptor;
23  import org.apache.ojb.broker.metadata.ClassDescriptor;
24  import org.apache.ojb.broker.metadata.CollectionDescriptor;
25  import org.apache.ojb.broker.metadata.DescriptorRepository;
26  import org.apache.ojb.broker.metadata.FieldDescriptor;
27  import org.apache.ojb.broker.metadata.ObjectReferenceDescriptor;
28  
29  /**
30   * Helper class for anonymous fields.
31   *
32   * @author Houar TINE
33   * @version $Id: AnonymousPersistentFieldHelper.java,v 1.7.2.2 2004/12/23 22:03:25 brj Exp $
34   */
35  public class AnonymousPersistentFieldHelper
36  {
37      public static void computeInheritedPersistentFields(final DescriptorRepository repository)
38      {
39          Map   descriptorTable = repository.getDescriptorTable();
40          final String   OBJECT = Object  .class.getName();
41          for (Iterator   iter = descriptorTable.entrySet().iterator(); iter.hasNext();)
42          {
43              Map.Entry   me = (Map.Entry  ) iter.next();
44              ClassDescriptor cld = (ClassDescriptor) me.getValue();
45              String   baseClass = cld.getBaseClass();
46              if (null != baseClass)
47              {
48                  Vector   inheritedFields = new Vector  ();
49                  do
50                  {
51                      ClassDescriptor baseCld = repository.getDescriptorFor(baseClass);
52                      FieldDescriptor[] baseFields = baseCld.getFieldDescriptions();
53                      for (int i = baseFields.length - 1; i >= 0; i--)
54                      {
55                          FieldDescriptor f = baseFields[i];
56                          if (!(f instanceof AnonymousFieldDescriptor))
57                          {
58                              inheritedFields.add(f.getPersistentField());
59                          }
60                      }
61                      Vector   ords = baseCld.getObjectReferenceDescriptors();
62                      for (int i = ords.size() - 1; i >= 0; i--)
63                      {
64                          ObjectReferenceDescriptor ord = (ObjectReferenceDescriptor) ords.get(i);
65                          PersistentField pf = ord.getPersistentField();
66                          if (!(pf instanceof AnonymousPersistentFieldForInheritance))
67                          {
68                              inheritedFields.add(pf);
69                          }
70                      }
71                      Vector   cds = baseCld.getCollectionDescriptors();
72                      for (int i = cds.size() - 1; i >= 0; i--)
73                      {
74                          CollectionDescriptor cd = (CollectionDescriptor) cds.get(i);
75                          inheritedFields.add(cd.getPersistentField());
76                      }
77                      baseClass = baseCld.getBaseClass();
78                  }
79                  while ((null != baseClass) && !(baseClass.equals(OBJECT)));
80                  cld.setSuperPersistentFieldDescriptors(inheritedFields);
81              }
82          }
83      }
84  }
85
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