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1 package com.daffodilwoods.daffodildb.server.datasystem.utility;
2
3 import com.daffodilwoods.daffodildb.server.datasystem.utility._Record;
4
5 import com.daffodilwoods.database.resource.*;
6 import java.util.*;
7 public class RecordVersion implements java.io.Serializable  {
8
9 HashMap columnIndexesMap;
10 RecordVersion rv ;
11 _Record currentRecord;
12
13 public RecordVersion( _Record record0 ) throws DException {
14 currentRecord = record0;
15 }
16
17
18 public _Record getPreviousRecord()throws DException{
19 _Record record = (_Record)currentRecord.clone();;
20 if(columnIndexesMap == null)
21 return record;
22 Set keySet = columnIndexesMap.keySet();
23 Iterator iter = keySet.iterator();
24 for(int i =0 ; i< columnIndexesMap.size();i++){
25 Object columnIndex = iter.next();
26 record.update(columnIndex.hashCode(),columnIndexesMap.get(columnIndex));
27 }
28 return (_Record)record;
29 }
30
31 public _Record getCurrentRecord() throws DException {
32 return (_Record)currentRecord.clone();
33 }
34
35
36 public void update(String columnName,Object newValue) throws DException {
37 throw new InternalError (" method not implemented ");
38 }
39
40 public void update(String [] columnName,Object [] newValue) throws DException {
41 throw new InternalError (" method not implemented ");
42 }
43
44 public void update(int[] columnIndexes,Object [] newValues)throws DException{
45 for(int i =0;i< columnIndexes.length ;i++)
46 update(columnIndexes[i],newValues[i]);
47 }
48
49 public void update(int columnIndex,Object newValue)throws DException{
50 Object oldValue = currentRecord.getObject(columnIndex);
51 Integer column = new Integer (columnIndex);
52 if(columnIndexesMap == null)
53 columnIndexesMap = new HashMap();
54 columnIndexesMap.put(column,oldValue);
55 currentRecord.update(columnIndex,newValue);
56 }
57
58 public Object Clone() throws CloneNotSupportedException {
59 try {
60 rv = new RecordVersion((_Record)currentRecord.clone());
61 if(columnIndexesMap == null)
62 rv.setColumnIndexMap(null);
63 else
64 rv.setColumnIndexMap((HashMap)columnIndexesMap.clone());
65 }
66 catch (DException ex) {
67
68 }
69 return rv;
70 }
71
72 public void setColumnIndexMap(HashMap columnIndexesMap) throws DException{
73 this.columnIndexesMap = columnIndexesMap;
74 }
75
76
79 }
80 |
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