RollingCharBuffer (Lucene 8.9.0 API)

```
public final class RollingCharBuffer
extends Object
```
Acts like a forever growing char[] as you read characters into it from the provided reader, but internally it uses a circular buffer to only hold the characters that haven't been freed yet. This is like a PushbackReader, except you don't have to specify up-front the max size of the buffer, but you do have to periodically call freeBefore(int).

Constructors
Constructor and Description
`RollingCharBuffer()`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`freeBefore(int pos)` Call this to notify us that no chars before this absolute position are needed anymore.
`int`	`get(int pos)`
`char[]`	`get(int posStart, int length)`
`void`	`reset(Reader reader)` Clear array and switch to new reader.

reset
```
public void reset(Reader reader)
```
Clear array and switch to new reader.

public int get(int pos)
        throws IOException

public char[] get(int posStart,
                  int length)

freeBefore
```
public void freeBefore(int pos)
```
Call this to notify us that no chars before this absolute position are needed anymore.

Class RollingCharBuffer