Package io.deephaven.extensions.barrage.chunk.array

Class ObjectArrayExpansionKernel

java.lang.Object

io.deephaven.extensions.barrage.chunk.array.ObjectArrayExpansionKernel

All Implemented Interfaces:

ArrayExpansionKernel

public class ObjectArrayExpansionKernel
extends Object
implements ArrayExpansionKernel

Constructor Summary

Constructors

Constructor	Description
ObjectArrayExpansionKernel(Class<?> componentType)

Method Summary

Modifier and Type	Method	Description
<T, A extends Any> WritableObjectChunk<T,A>	contract(Chunk<A> source, IntChunk<ChunkPositions> perElementLengthDest, WritableChunk<A> outChunk, int outOffset, int totalRows)	This contracts the source from a pair of LongChunk and Chunk<T> and produces a Chunk<T[]>.
<T, A extends Any> WritableChunk<A>	expand(ObjectChunk<T,A> source, WritableIntChunk<ChunkPositions> perElementLengthDest)	This expands the source from a T[] per element to a flat T per element.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ObjectArrayExpansionKernel

public ObjectArrayExpansionKernel(Class<?> componentType)

Method Details

expand

public <T,
A extends Any> WritableChunk<A> expand(ObjectChunk<T,A> source,
 WritableIntChunk<ChunkPositions> perElementLengthDest)

Description copied from interface: ArrayExpansionKernel

This expands the source from a T[] per element to a flat T per element. The kernel records the number of consecutive elements that belong to a row in perElementLengthDest. The returned chunk is owned by the caller.

Specified by:

expand in interface ArrayExpansionKernel

Parameters:

source - the source chunk of T[] to expand

perElementLengthDest - the destination IntChunk for which dest.get(i + 1) - dest.get(i) is equivalent to source.get(i).length

Returns:

an unrolled/flattened chunk of T

contract

public <T,
A extends Any> WritableObjectChunk<T,A> contract(Chunk<A> source,
 IntChunk<ChunkPositions> perElementLengthDest,
 WritableChunk<A> outChunk,
 int outOffset,
 int totalRows)

Description copied from interface: ArrayExpansionKernel

This contracts the source from a pair of LongChunk and Chunk<T> and produces a Chunk<T[]>. The returned chunk is owned by the caller.

Specified by:

contract in interface ArrayExpansionKernel

Parameters:

source - the source chunk of T to contract

perElementLengthDest - the source IntChunk for which dest.get(i + 1) - dest.get(i) is equivalent to source.get(i).length

outChunk - the returned chunk from an earlier record batch

outOffset - the offset to start writing into outChunk

totalRows - the total known rows for this column; if known (else 0)

Returns:

a result chunk of T[]