jackson-databind 2.16.0 · com.fasterxml.jackson.databind.util.ObjectBuffer

Field Summary

Modifier and Type	Field and Description
private Object[]	_freeBuffer Reusable Object array, stored here after buffer has been released having been used previously.
private LinkedNode<Object[]>	_head
private int	_size Number of total buffered entries in this buffer, counting all instances within linked list formed by following `_head`.
private LinkedNode<Object[]>	_tail
private static final int	MAX_CHUNK Let's limit maximum size of chunks we use; helps avoid excessive allocation overhead for huge data sets.
private static final int	SMALL_CHUNK Also: let's expand by doubling up until 64k chunks (which is 16k entries for 32-bit machines)

Constructor Summary

Access	Constructor and Description
public	ObjectBuffer()

Method Summary

Modifier and Type	Method and Description
protected final void	_copyTo(Object resultArray, int totalSize, Object[] lastChunk, int lastChunkEntries)
protected void	_reset()
public Object[]	Returns: New chunk buffer for caller to fill appendCompletedChunk(Object[] Completed chunk that the caller is requesting to append to this buffer. It is generally chunk that was returned by an earlier call to `resetAndStart` or `appendCompletedChunk` (although this is not required or enforced) fullChunk) Method called to add a full Object array as a chunk buffered within this buffer, and to obtain a new array to fill.
public int	bufferedSize() Method that can be used to check how many Objects have been buffered within this buffer.
public Object[]	completeAndClearBuffer(Object[] lastChunk, int lastChunkEntries) Method called to indicate that the buffering process is now complete; and to construct a combined exactly-sized result array.
public <T> T[]	completeAndClearBuffer(Object[] lastChunk, int lastChunkEntries, Class<T> Type of elements included in the buffer. Will be used for constructing the result array. componentType) Type-safe alternative to `completeAndClearBuffer(Object[], int)`, to allow for constructing explicitly typed result array.
public void	completeAndClearBuffer(Object[] lastChunk, int lastChunkEntries, List<Object> resultList)
public int	initialCapacity() Helper method that can be used to check how much free capacity will this instance start with.
public Object[]	resetAndStart() Method called to start buffering process.
public Object[]	resetAndStart(Object[] base, int count)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

_freeBuffer	back to summary
private Object[] _freeBuffer Reusable Object array, stored here after buffer has been released having been used previously.

_head	back to summary
private LinkedNode<Object[]> _head

_size	back to summary
private int _size Number of total buffered entries in this buffer, counting all instances within linked list formed by following `_head`.

_tail	back to summary
private LinkedNode<Object[]> _tail

MAX_CHUNK	back to summary
private static final int MAX_CHUNK Let's limit maximum size of chunks we use; helps avoid excessive allocation overhead for huge data sets. For now, let's limit to quarter million entries, 1 meg chunks for 32-bit machines.

SMALL_CHUNK	back to summary
private static final int SMALL_CHUNK Also: let's expand by doubling up until 64k chunks (which is 16k entries for 32-bit machines)

Constructor Detail

ObjectBuffer	back to summary
public ObjectBuffer()

Method Detail

_copyTo	back to summary
protected final void _copyTo(Object resultArray, int totalSize, Object[] lastChunk, int lastChunkEntries)

_reset	back to summary
protected void _reset()

appendCompletedChunk back to summary

appendCompletedChunk	back to summary
public Object[] appendCompletedChunk(Object[] fullChunk) Method called to add a full Object array as a chunk buffered within this buffer, and to obtain a new array to fill. Caller is not to use the array it gives; but to use the returned array for continued buffering. Parameters fullChunk:Object[] Completed chunk that the caller is requesting to append to this buffer. It is generally chunk that was returned by an earlier call to `resetAndStart` or `appendCompletedChunk` (although this is not required or enforced) Returns:Object[] New chunk buffer for caller to fill

public Object[] appendCompletedChunk(Object[] fullChunk)

Method called to add a full Object array as a chunk buffered within this buffer, and to obtain a new array to fill. Caller is not to use the array it gives; but to use the returned array for continued buffering.

Parameters

fullChunk:Object[]: Completed chunk that the caller is requesting to append to this buffer. It is generally chunk that was returned by an earlier call to resetAndStart or appendCompletedChunk (although this is not required or enforced)

Returns:Object[]

New chunk buffer for caller to fill

bufferedSize	back to summary
public int bufferedSize() Method that can be used to check how many Objects have been buffered within this buffer.

completeAndClearBuffer back to summary

completeAndClearBuffer	back to summary
public Object[] completeAndClearBuffer(Object[] lastChunk, int lastChunkEntries) Method called to indicate that the buffering process is now complete; and to construct a combined exactly-sized result array. Additionally the buffer itself will be reset to reduce memory retention. Resulting array will be of generic `Object[]` type: if a typed array is needed, use the method with additional type argument.

public Object[] completeAndClearBuffer(Object[] lastChunk, int lastChunkEntries)

Method called to indicate that the buffering process is now complete; and to construct a combined exactly-sized result array. Additionally the buffer itself will be reset to reduce memory retention.

Resulting array will be of generic Object[] type: if a typed array is needed, use the method with additional type argument.