/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2000,2008 Oracle. All rights reserved.
*
* $Id: RecordNumberBinding.java,v 12.6 2008/01/08 20:58:35 bostic Exp $
*/
package com.sleepycat.bind;
import com.sleepycat.compat.DbCompat;
import com.sleepycat.db.DatabaseEntry;
/**
* An EntryBinding
that treats a record number key entry as a
* Long
key object.
*
*
Record numbers are returned as Long
objects, although on
* input any Number
object may be used.
*
* @author Mark Hayes
*/
public class RecordNumberBinding implements EntryBinding {
/**
* Creates a byte array binding.
*/
public RecordNumberBinding() {
}
// javadoc is inherited
public Object entryToObject(DatabaseEntry entry) {
return new Long(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);
}
}