1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2000, 2011 Oracle and/or its affiliates. All rights reserved.
*
*/
package com.sleepycat.bind;
import com.sleepycat.compat.DbCompat;
import com.sleepycat.db.DatabaseEntry;
/**
* An <code>EntryBinding</code> that treats a record number key entry as a
* <code>Long</code> key object.
*
* <p>Record numbers are returned as <code>Long</code> objects, although on
* input any <code>Number</code> object may be used.</p>
*
* @author Mark Hayes
*/
public class RecordNumberBinding implements EntryBinding {
/**
* Creates a byte array binding.
*/
public RecordNumberBinding() {
}
// javadoc is inherited
public Long entryToObject(DatabaseEntry entry) {
return Long.valueOf(entryToRecordNumber(entry));
}
// javadoc is inherited
public void objectToEntry(Object object, DatabaseEntry entry) {
recordNumberToEntry(((Number) object).longValue(), entry);
}
/**
* Utility method for use by bindings to translate a entry buffer to an
* record number integer.
*
* @param entry the entry buffer.
*
* @return the record number.
*/
public static long entryToRecordNumber(DatabaseEntry entry) {
return DbCompat.getRecordNumber(entry) & 0xFFFFFFFFL;
}
/**
* Utility method for use by bindings to translate a record number integer
* to a entry buffer.
*
* @param recordNumber the record number.
*
* @param entry the entry buffer to hold the record number.
*/
public static void recordNumberToEntry(long recordNumber,
DatabaseEntry entry) {
entry.setData(new byte[4], 0, 4);
DbCompat.setRecordNumber(entry, (int) recordNumber);
}
}
|
