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Java > Open Source Codes > org > apache > cayenne > reflect > generic > DataObjectDescriptor


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19 package org.apache.cayenne.reflect.generic;
20
21 import org.apache.cayenne.DataObject;
22 import org.apache.cayenne.reflect.PersistentDescriptor;
23 import org.apache.cayenne.reflect.PropertyException;
24
25 /**
26  * A ClassDescriptor for "generic" persistent classes implementing {@link DataObject}
27  * interface.
28  *
29  * @since 3.0
30  * @author Andrus Adamchik
31  */
32 // non-public as the only difference with the superclass is version handling on merge -
33 // this is something we need to solved in a more generic fashion (e.g. as via enhancer)
34 // for other object types.
35 class DataObjectDescriptor extends PersistentDescriptor {
36
37     public void shallowMerge(Object JavaDoc from, Object JavaDoc to) throws PropertyException {
38         super.shallowMerge(from, to);
39
40         if (from instanceof DataObject && to instanceof DataObject) {
41             ((DataObject) to)
42                     .setSnapshotVersion(((DataObject) from).getSnapshotVersion());
43         }
44     }
45 }
46
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