IOUtils.ScratchBytes

java.lang.Object
- org.apache.commons.io.IOUtils.ScratchBytes

All Implemented Interfaces:

java.lang.AutoCloseable

Enclosing class:

IOUtils
```
static final class IOUtils.ScratchBytes
extends java.lang.Object
implements java.lang.AutoCloseable
```
Holder for per-thread internal scratch buffer.
Buffers are created lazily and reused within the same thread to reduce allocation overhead. In the rare case of reentrant access, a temporary buffer is allocated to avoid data corruption.

Typical usage:
```
 try (ScratchBytes scratch = ScratchBytes.get()) {
     // use the buffer
     byte[] bytes = scratch.array();
     // ...
 }
 
```

Field Summary

Fields
Modifier and Type	Field	Description
`private byte[]`	`buffer`	The buffer, or null if using the thread-local buffer.
`private static IOUtils.ScratchBytes`	`INSTANCE`
`private static java.lang.ThreadLocal<java.lang.Object[]>`	`LOCAL`	Wraps an internal byte array.

Constructor Summary

Constructors
Modifier Constructor Description

private ScratchBytes(byte[] buffer)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) byte[]`	`array()`
`void`	`close()`	If the buffer is the internal array, clear and release it for reuse.
`(package private) static IOUtils.ScratchBytes`	`get()`	Gets the internal byte array buffer.

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

- Field Detail
  - LOCAL
```
private static final java.lang.ThreadLocal<java.lang.Object[]> LOCAL
```
    Wraps an internal byte array. [0] boolean in use. [1] byte[] buffer.
  - INSTANCE
```
private static final IOUtils.ScratchBytes INSTANCE
```
  - buffer
```
private final byte[] buffer
```
    The buffer, or null if using the thread-local buffer.
- Constructor Detail
  - ScratchBytes
```
private ScratchBytes(byte[] buffer)
```
- Method Detail
  - get
```
static IOUtils.ScratchBytes get()
```
    Gets the internal byte array buffer.
    
    Returns:
    
    the internal byte array buffer.
  - array
```
byte[] array()
```
  - close
```
public void close()
```
    If the buffer is the internal array, clear and release it for reuse.
    
    Specified by:
    
    close in interface java.lang.AutoCloseable