com.sleepycat.persist.impl

Class PersistComparator

java.lang.Object

com.sleepycat.persist.impl.PersistComparator

All Implemented Interfaces:

DatabaseComparator, Serializable, Comparator<byte[]>

public class PersistComparator
extends Object
implements DatabaseComparator, Comparator<byte[]>, Serializable

The btree comparator for persistent key classes. The serialized form of this comparator is stored in the BDB JE database descriptor so that the comparator can be re-created during recovery.

Author:

Mark Hayes

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PersistComparator(PersistKeyBinding binding)

Method Summary

Modifier and Type	Method and Description
int	compare(byte[] b1, byte[] b2)
void	initialize(ClassLoader loader) In BDB JE this method will be called after the comparator is deserialized, including during recovery.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

PersistComparator

public PersistComparator(PersistKeyBinding binding)

Method Detail

initialize

public void initialize(ClassLoader loader)

In BDB JE this method will be called after the comparator is deserialized, including during recovery. We must construct the binding here, without access to the stored catalog since recovery is not complete.

Specified by:

initialize in interface DatabaseComparator

Parameters:

loader - is the environment's ClassLoader property.

compare

public int compare(byte[] b1,
                   byte[] b2)

Specified by:

compare in interface Comparator<byte[]>

toString

public String toString()

Overrides:

toString in class Object