CyclicBuffer

ch.qos.logback.core.helpers

Class CyclicBuffer<E>

java.lang.Object
- ch.qos.logback.core.helpers.CyclicBuffer<E>

```
public class CyclicBuffer<E>
extends Object
```
CyclicBuffer holds values in a cyclic array.
It allows read access to any element in the buffer not just the first or last element.

Constructor Summary

Constructors

Constructor and Description
`CyclicBuffer(CyclicBuffer<E> other)`
`CyclicBuffer(int maxSize)` Instantiate a new CyclicBuffer of at most `maxSize` events.

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`void`	`add(E event)` Add an `event` as the last event in the buffer.
`List<E>`	`asList()`
`void`	`clear()` Clears the buffer and resets all attributes.
`E`	`get()` Get the oldest (first) element in the buffer.
`E`	`get(int i)` Get the ith oldest event currently in the buffer.
`int`	`getMaxSize()`
`int`	`length()` Get the number of elements in the buffer.
`void`	`resize(int newSize)` Resize the cyclic buffer to `newSize`.

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

- Constructor Detail
  - CyclicBuffer
```
public CyclicBuffer(int maxSize)
             throws IllegalArgumentException
```
    Instantiate a new CyclicBuffer of at most maxSize events. The maxSize argument must a positive integer.
    
    Parameters:
    
    maxSize - The maximum number of elements in the buffer.
    
    Throws:
    
    IllegalArgumentException
  - CyclicBuffer
```
public CyclicBuffer(CyclicBuffer<E> other)
```
- Method Detail
  - clear
```
public void clear()
```
    Clears the buffer and resets all attributes.
  - add
```
public void add(E event)
```
    Add an event as the last event in the buffer.
  - get
```
public E get(int i)
```
    Get the ith oldest event currently in the buffer. If i is outside the range 0 to the number of elements currently in the buffer, then null is returned.
  - getMaxSize
```
public int getMaxSize()
```
  - get
```
public E get()
```
    Get the oldest (first) element in the buffer. The oldest element is removed from the buffer.
  - asList
```
public List<E> asList()
```
  - length
```
public int length()
```
    Get the number of elements in the buffer. This number is guaranteed to be in the range 0 to maxSize (inclusive).
  - resize
```
public void resize(int newSize)
```
    Resize the cyclic buffer to newSize.
    
    Throws:
    
    IllegalArgumentException - if newSize is negative.