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1   /*
2    * Copyright 1999-2004 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  package org.apache.commons.jxpath.ri.model.dynamic;
17  
18  import java.util.Locale;
19  
20  import org.apache.commons.jxpath.DynamicPropertyHandler;
21  import org.apache.commons.jxpath.JXPathBeanInfo;
22  import org.apache.commons.jxpath.JXPathIntrospector;
23  import org.apache.commons.jxpath.ri.QName;
24  import org.apache.commons.jxpath.ri.model.NodePointer;
25  import org.apache.commons.jxpath.ri.model.NodePointerFactory;
26  import org.apache.commons.jxpath.ri.model.beans.NullPointer;
27  import org.apache.commons.jxpath.util.ValueUtils;
28  
29  /***
30   * Implements NodePointerFactory for Dynamic classes like Map.
31   *
32   * @author Dmitri Plotnikov
33   * @version $Revision: 1.5 $ $Date: 2004/02/29 14:17:44 $
34   */
35  public class DynamicPointerFactory implements NodePointerFactory {
36  
37      public static final int DYNAMIC_POINTER_FACTORY_ORDER = 800;
38  
39      public int getOrder() {
40          return DYNAMIC_POINTER_FACTORY_ORDER;
41      }
42  
43      public NodePointer createNodePointer(
44          QName name,
45          Object bean,
46          Locale locale) 
47      {
48          JXPathBeanInfo bi = JXPathIntrospector.getBeanInfo(bean.getClass());
49          if (bi.isDynamic()) {
50              DynamicPropertyHandler handler =
51                  ValueUtils.getDynamicPropertyHandler(
52                      bi.getDynamicPropertyHandlerClass());
53              return new DynamicPointer(name, bean, handler, locale);
54          }
55          return null;
56      }
57  
58      public NodePointer createNodePointer(
59          NodePointer parent,
60          QName name,
61          Object bean) 
62      {
63          if (bean == null) {
64              return new NullPointer(parent, name);
65          }
66  
67          JXPathBeanInfo bi = JXPathIntrospector.getBeanInfo(bean.getClass());
68          if (bi.isDynamic()) {
69              DynamicPropertyHandler handler =
70                  ValueUtils.getDynamicPropertyHandler(
71                      bi.getDynamicPropertyHandlerClass());
72              return new DynamicPointer(parent, name, bean, handler);
73          }
74          return null;
75      }
76  }