IndexedListProperty


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19  
20  package org.apache.cayenne.reflect;
21  
22  import java.util.List  ;
23  
24  import org.apache.cayenne.ValueHolder;
25  import org.apache.cayenne.util.IndexPropertyList;
26  
27  /**
28   * A CollectionProperty that uses IndexPropertyList.
29   * 
30   * @since 1.2
31   * @author Andrus Adamchik
32   */
33  public class IndexedListProperty extends ListProperty {
34  
35      protected String   indexPropertyName;
36  
37      public IndexedListProperty(ClassDescriptor owner, ClassDescriptor targetDescriptor,
38              Accessor accessor, String   reverseName, String   indexPropertyName) {
39  
40          super(owner, targetDescriptor, accessor, reverseName);
41          this.indexPropertyName = indexPropertyName;
42      }
43  
44      /**
45       * Creates a List indexed on a specified property.
46       */
47      protected ValueHolder createCollectionValueHolder(Object   object)
48              throws PropertyException {
49          List   unordered = (List  ) super.createCollectionValueHolder(object);
50          return new IndexPropertyList(indexPropertyName, unordered, true);
51      }
52  }
53
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