RollingBuffer (Lucene 9.11.1 core API)

java.lang.Object
- org.apache.lucene.util.RollingBuffer<T>

```
public abstract class RollingBuffer<T extends RollingBuffer.Resettable>
extends Object
```
Acts like forever growing T[], but internally uses a circular buffer to reuse instances of T.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static interface RollingBuffer.Resettable
Implement to reset an instance

Constructor Summary

Constructors
Constructor Description

RollingBuffer()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`freeBefore(int pos)`
`T`	`get(int pos)`	Get T instance for this absolute position; this is allowed to be arbitrarily far "in the future" but cannot be before the last freeBefore.
`int`	`getBufferSize()`	Returns how many active positions are in the buffer.
`int`	`getMaxPos()`	Returns the maximum position looked up, or -1 if no position has been looked up since reset/init.
`protected abstract T`	`newInstance()`
`void`	`reset()`

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

- Constructor Detail
  - RollingBuffer
```
public RollingBuffer()
```
- Method Detail
  - newInstance
```
protected abstract T newInstance()
```
  - reset
```
public void reset()
```
  - get
```
public T get(int pos)
```
    Get T instance for this absolute position; this is allowed to be arbitrarily far "in the future" but cannot be before the last freeBefore.
  - getMaxPos
```
public int getMaxPos()
```
    Returns the maximum position looked up, or -1 if no position has been looked up since reset/init.
  - getBufferSize
```
public int getBufferSize()
```
    Returns how many active positions are in the buffer.
  - freeBefore
```
public void freeBefore(int pos)
```