Package org.h2.util

Class CacheHead

java.lang.Object

org.h2.util.CacheObject

org.h2.util.CacheHead

All Implemented Interfaces:

Comparable<CacheObject>

public class CacheHead
extends CacheObject

The head element of the linked list.

Field Summary

Fields inherited from class org.h2.util.CacheObject

cacheChained, cacheNext, cachePrevious

Constructor Summary

Constructors

Constructor	Description
CacheHead()

Method Summary

Modifier and Type	Method	Description
boolean	canRemove()	Check if the object can be removed from the cache.
int	getMemory()	Get the estimated used memory.

Methods inherited from class org.h2.util.CacheObject

compareTo, getPos, isChanged, isStream, setChanged, setPos

Methods inherited from class java.lang.Object

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

Constructor Details

CacheHead

public CacheHead()

Method Details

canRemove

public boolean canRemove()

Description copied from class: CacheObject

Check if the object can be removed from the cache. For example pinned objects can not be removed.

Specified by:

canRemove in class CacheObject

Returns:

true if it can be removed

getMemory

public int getMemory()

Description copied from class: CacheObject

Get the estimated used memory.

Specified by:

getMemory in class CacheObject

Returns:

number of words (one word is 4 bytes)