CacheObject (H2 Database Engine wt-1.0.1 API)

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

所有已实现的接口:

Comparable<CacheObject>

直接已知子类:

CacheHead, Page
```
public abstract class CacheObject
extends Object
implements Comparable<CacheObject>
```
The base object for all cached objects.

字段概要

字段
限定符和类型	字段和说明
`CacheObject`	`cacheChained` The next element in the hash chain.
`CacheObject`	`cacheNext` The next element in the LRU linked list.
`CacheObject`	`cachePrevious` The previous element in the LRU linked list.

构造器概要

构造器
构造器和说明

CacheObject()

方法概要

所有方法实例方法抽象方法具体方法
限定符和类型	方法和说明
`abstract boolean`	`canRemove()` Check if the object can be removed from the cache.
`int`	`compareTo(CacheObject other)`
`abstract int`	`getMemory()` Get the estimated used memory.
`int`	`getPos()`
`boolean`	`isChanged()` Check if this cache object has been changed and thus needs to be written back to the storage.
`boolean`	`isStream()`
`void`	`setChanged(boolean b)`
`void`	`setPos(int pos)`

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - cachePrevious
```
public CacheObject cachePrevious
```
    The previous element in the LRU linked list. If the previous element is the head, then this element is the most recently used object.
  - cacheNext
```
public CacheObject cacheNext
```
    The next element in the LRU linked list. If the next element is the head, then this element is the least recently used object.
  - cacheChained
```
public CacheObject cacheChained
```
    The next element in the hash chain.
- 构造器详细资料
  - CacheObject
```
public CacheObject()
```
- 方法详细资料
  - canRemove
```
public abstract boolean canRemove()
```
    Check if the object can be removed from the cache. For example pinned objects can not be removed.
    
    返回:
    
    true if it can be removed
  - getMemory
```
public abstract int getMemory()
```
    Get the estimated used memory.
    
    返回:
    
    number of words (one word is 4 bytes)
  - setPos
```
public void setPos(int pos)
```
  - getPos
```
public int getPos()
```
  - isChanged
```
public boolean isChanged()
```
    Check if this cache object has been changed and thus needs to be written back to the storage.
    
    返回:
    
    if it has been changed
  - setChanged
```
public void setChanged(boolean b)
```
  - compareTo
```
public int compareTo(CacheObject other)
```
    指定者:
    
    compareTo 在接口中 Comparable<CacheObject>
  - isStream
```
public boolean isStream()
```

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