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Java > Open Source Codes > org > apache > cayenne > remote > hessian > DataRowDeserializer


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19
20 package org.apache.cayenne.remote.hessian;
21
22 import java.io.IOException JavaDoc;
23 import java.lang.reflect.Field JavaDoc;
24
25 import org.apache.cayenne.CayenneRuntimeException;
26 import org.apache.cayenne.DataRow;
27
28 import com.caucho.hessian.io.AbstractHessianInput;
29 import com.caucho.hessian.io.AbstractMapDeserializer;
30
31 /**
32  * Client side deserilaizer of DataRows.
33  *
34  * @author Andrus Adamchik
35  * @since 1.2
36  */
37 class DataRowDeserializer extends AbstractMapDeserializer {
38
39     protected Field JavaDoc versionField;
40
41     DataRowDeserializer() {
42         try {
43             versionField = DataRow.class.getDeclaredField("version");
44         }
45         catch (Exception JavaDoc e) {
46             throw new CayenneRuntimeException(
47                     "Error building deserializer for DataRow",
48                     e);
49         }
50
51         versionField.setAccessible(true);
52     }
53
54     public Class JavaDoc getType() {
55         return DataRow.class;
56     }
57
58     public Object JavaDoc readMap(AbstractHessianInput in) throws IOException JavaDoc {
59
60         int size = in.readInt();
61         DataRow row = new DataRow(size);
62         try {
63             versionField.set(row, new Long JavaDoc(in.readLong()));
64         }
65         catch (Exception JavaDoc e) {
66             throw new IOException JavaDoc("Error reading 'version' field");
67         }
68
69         row.setReplacesVersion(in.readLong());
70         in.addRef(row);
71
72         while (!in.isEnd()) {
73             row.put(in.readObject(), in.readObject());
74         }
75
76         in.readEnd();
77
78         return row;
79     }
80 }
81
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