RootReference

java.lang.Object
- org.h2.mvstore.RootReference<K,V>

```
public final class RootReference<K,V>
extends java.lang.Object
```
Class RootReference is an immutable structure to represent state of the MVMap as a whole (not related to a particular B-Tree node). Single structure would allow for non-blocking atomic state change. The most important part of it is a reference to the root node.

Field Summary

Fields
Modifier and Type Field Description

Page<K,V> root
The root page.

long version
The version used for writing.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`getTotalCount()`
`boolean`	`isLockedByCurrentThread()`
`boolean`	`needFlush()`	Whether flushing is needed.
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - root
```
public final Page<K,V> root
```
    The root page.
  - version
```
public final long version
```
    The version used for writing.
- Method Detail
  - isLockedByCurrentThread
```
public boolean isLockedByCurrentThread()
```
  - needFlush
```
public boolean needFlush()
```
    Whether flushing is needed.
    
    Returns:
    
    true if yes
  - getTotalCount
```
public long getTotalCount()
```
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object