BufferRecycler (Jackson-core 2.9.0 API)

java.lang.Object
- com.fasterxml.jackson.core.util.BufferRecycler

```
public class BufferRecycler
extends Object
```
This is a small utility class, whose main functionality is to allow simple reuse of raw byte/char buffers. It is usually used through ThreadLocal member of the owning class pointing to instance of this class through a SoftReference. The end result is a low-overhead GC-cleanable recycling: hopefully ideal for use by stream readers.

Field Summary

Fields
Modifier and Type	Field and Description
`protected byte[][]`	`_byteBuffers`
`protected char[][]`	`_charBuffers`
`static int`	`BYTE_BASE64_CODEC_BUFFER` Buffer used for concatenating binary data that is either being encoded as base64 output, or decoded from base64 input.
`static int`	`BYTE_READ_IO_BUFFER` Buffer used for reading byte-based input.
`static int`	`BYTE_WRITE_CONCAT_BUFFER` Buffer used for temporarily concatenating output; used for example when requesting output as byte array.
`static int`	`BYTE_WRITE_ENCODING_BUFFER` Buffer used for temporarily storing encoded content; used for example by UTF-8 encoding writer
`static int`	`CHAR_CONCAT_BUFFER`
`static int`	`CHAR_NAME_COPY_BUFFER`
`static int`	`CHAR_TEXT_BUFFER`
`static int`	`CHAR_TOKEN_BUFFER`

Constructor Summary

Constructors
Modifier	Constructor and Description
	`BufferRecycler()` Default constructor used for creating instances of this default implementation.
`protected`	`BufferRecycler(int bbCount, int cbCount)` Alternate constructor to be used by sub-classes, to allow customization of number of low-level buffers in use.

Method Summary

Methods
Modifier and Type	Method and Description
`byte[]`	`allocByteBuffer(int ix)`
`byte[]`	`allocByteBuffer(int ix, int minSize)`
`char[]`	`allocCharBuffer(int ix)`
`char[]`	`allocCharBuffer(int ix, int minSize)`
`protected byte[]`	`balloc(int size)`
`protected int`	`byteBufferLength(int ix)`
`protected char[]`	`calloc(int size)`
`protected int`	`charBufferLength(int ix)`
`void`	`releaseByteBuffer(int ix, byte[] buffer)`
`void`	`releaseCharBuffer(int ix, char[] buffer)`

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

- Field Detail
  - BYTE_READ_IO_BUFFER
```
public static final int BYTE_READ_IO_BUFFER
```
    Buffer used for reading byte-based input.
    
    See Also:
    Constant Field Values
  - BYTE_WRITE_ENCODING_BUFFER
```
public static final int BYTE_WRITE_ENCODING_BUFFER
```
    Buffer used for temporarily storing encoded content; used for example by UTF-8 encoding writer
    
    See Also:
    Constant Field Values
  - BYTE_WRITE_CONCAT_BUFFER
```
public static final int BYTE_WRITE_CONCAT_BUFFER
```
    Buffer used for temporarily concatenating output; used for example when requesting output as byte array.
    
    See Also:
    Constant Field Values
  - BYTE_BASE64_CODEC_BUFFER
```
public static final int BYTE_BASE64_CODEC_BUFFER
```
    Buffer used for concatenating binary data that is either being encoded as base64 output, or decoded from base64 input.
    
    Since:
    
    2.1
    
    See Also:
    Constant Field Values
  - CHAR_TOKEN_BUFFER
```
public static final int CHAR_TOKEN_BUFFER
```
    See Also:
    Constant Field Values
  - CHAR_CONCAT_BUFFER
```
public static final int CHAR_CONCAT_BUFFER
```
    See Also:
    Constant Field Values
  - CHAR_TEXT_BUFFER
```
public static final int CHAR_TEXT_BUFFER
```
    See Also:
    Constant Field Values
  - CHAR_NAME_COPY_BUFFER
```
public static final int CHAR_NAME_COPY_BUFFER
```
    See Also:
    Constant Field Values
  - _byteBuffers
```
protected final byte[][] _byteBuffers
```
  - _charBuffers
```
protected final char[][] _charBuffers
```
- Constructor Detail
  - BufferRecycler
```
public BufferRecycler()
```
    Default constructor used for creating instances of this default implementation.
  - BufferRecycler
```
protected BufferRecycler(int bbCount,
              int cbCount)
```
    Alternate constructor to be used by sub-classes, to allow customization of number of low-level buffers in use.
    
    Since:
    
    2.4
- Method Detail
  - allocByteBuffer
```
public final byte[] allocByteBuffer(int ix)
```
    Parameters:
    ix - One of READ_IO_BUFFER constants.
  - allocByteBuffer
```
public byte[] allocByteBuffer(int ix,
                     int minSize)
```
  - releaseByteBuffer
```
public final void releaseByteBuffer(int ix,
                     byte[] buffer)
```
  - allocCharBuffer
```
public final char[] allocCharBuffer(int ix)
```
  - allocCharBuffer
```
public char[] allocCharBuffer(int ix,
                     int minSize)
```
  - releaseCharBuffer
```
public void releaseCharBuffer(int ix,
                     char[] buffer)
```
  - byteBufferLength
```
protected int byteBufferLength(int ix)
```
  - charBufferLength
```
protected int charBufferLength(int ix)
```
  - balloc
```
protected byte[] balloc(int size)
```
  - calloc
```
protected char[] calloc(int size)
```

Class BufferRecycler

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BYTE_READ_IO_BUFFER

BYTE_WRITE_ENCODING_BUFFER

BYTE_WRITE_CONCAT_BUFFER

BYTE_BASE64_CODEC_BUFFER

CHAR_TOKEN_BUFFER

CHAR_CONCAT_BUFFER

CHAR_TEXT_BUFFER

CHAR_NAME_COPY_BUFFER

_byteBuffers

_charBuffers

Constructor Detail

BufferRecycler

BufferRecycler

Method Detail

allocByteBuffer

allocByteBuffer

releaseByteBuffer

allocCharBuffer

allocCharBuffer

releaseCharBuffer

byteBufferLength

charBufferLength

balloc

calloc