CacheHead

java.lang.Object
- org.h2.util.CacheObject
- - org.h2.util.CacheHead

All Implemented Interfaces:

java.lang.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

All Methods Instance Methods Concrete Methods
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 Detail
  - CacheHead
```
public CacheHead()
```
- Method Detail
  - 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)