Package com.semedy.reasoner.edb.persistentstore.bplustree

Class CompressedBPlusNode<KeyType,KeyBufferType>

java.lang.Object

com.semedy.reasoner.edb.persistentstore.bplustree.CompressedBPlusNode<KeyType,KeyBufferType>

All Implemented Interfaces:

CacheUnit

public class CompressedBPlusNode<KeyType,KeyBufferType>
extends Object
implements CacheUnit

Constructor Summary

Constructors

Constructor	Description
CompressedBPlusNode(byte[] data, int offset, Map<Integer,CompressedBPlusNode<KeyType,KeyBufferType>> addressToCompressedNode, boolean internal)

Method Summary

Modifier and Type	Method	Description
void	destroy()	free up ressources at the end (CacheManager.clear)
byte[]	getData()
CacheUnit	getLast()
CacheUnit	getNext()
boolean	isInternalNode()
boolean	isReleasable()	is this unit releasable
void	release()	Cache management calls this method to release the cache unit.
void	setLast(CacheUnit last)
void	setNext(CacheUnit next)	pointers in a list for cache management
long	sizeInBytes()	releases this number of bytes
void	touch()	touch a cache unit.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CompressedBPlusNode

public CompressedBPlusNode(byte[] data,
 int offset,
 Map<Integer,CompressedBPlusNode<KeyType,KeyBufferType>> addressToCompressedNode,
 boolean internal)
                    throws IOException

Throws:

IOException

Method Details

touch

public void touch()
           throws IOException

Description copied from interface: CacheUnit

touch a cache unit.
this means for cache management that this unit
will be used and has a lower prio to be released

Specified by:

touch in interface CacheUnit

Throws:

IOException

setNext

public void setNext(CacheUnit next)

Description copied from interface: CacheUnit

pointers in a list for cache management

Specified by:

setNext in interface CacheUnit

getNext

public CacheUnit getNext()

Specified by:

getNext in interface CacheUnit

setLast

public void setLast(CacheUnit last)

Specified by:

setLast in interface CacheUnit

getLast

public CacheUnit getLast()

Specified by:

getLast in interface CacheUnit

release

public void release()
             throws IOException

Description copied from interface: CacheUnit

Cache management calls this method to release the cache unit.

Specified by:

release in interface CacheUnit

Throws:

IOException

isReleasable

public boolean isReleasable()
                     throws IOException

Description copied from interface: CacheUnit

is this unit releasable

Specified by:

isReleasable in interface CacheUnit

Returns:

Throws:

IOException

sizeInBytes

public long sizeInBytes()

Description copied from interface: CacheUnit

releases this number of bytes

Specified by:

sizeInBytes in interface CacheUnit

Returns:

destroy

public void destroy()
             throws IOException

Description copied from interface: CacheUnit

free up ressources at the end (CacheManager.clear)

Specified by:

destroy in interface CacheUnit

Throws:

IOException

getData

public byte[] getData()
               throws IOException

Throws:

IOException

isInternalNode

public boolean isInternalNode()