org.apache.drill.exec.vector.accessor.writer

Interface UnionWriterImpl.UnionShim

All Superinterfaces:

WriterEvents, WriterPosition

All Known Implementing Classes:

EmptyListShim, SimpleListShim, UnionVectorShim

Enclosing class:

UnionWriterImpl

public static interface UnionWriterImpl.UnionShim
extends WriterEvents

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.drill.exec.vector.accessor.writer.WriterEvents

WriterEvents.ColumnWriterListener, WriterEvents.State

Method Summary

Modifier and Type	Method and Description
void	addMember(AbstractObjectWriter colWriter)
AbstractObjectWriter	addMember(ColumnMetadata colSchema)
AbstractObjectWriter	addMember(TypeProtos.MinorType type)
void	bindWriter(UnionWriterImpl writer)
boolean	hasType(TypeProtos.MinorType type)
int	lastWriteIndex() Return the last write position in the vector.
ObjectWriter	member(TypeProtos.MinorType type) Return an existing writer for the given type, or create a new one if needed.
int	rowStartIndex() Position within the vector of the first value for the current row.
void	setNull()
void	setType(TypeProtos.MinorType type)

Methods inherited from interface org.apache.drill.exec.vector.accessor.writer.WriterEvents

bindIndex, bindListener, dump, endArrayValue, endWrite, postRollover, preRollover, restartRow, saveRow, startRow, startWrite

Methods inherited from interface org.apache.drill.exec.vector.accessor.WriterPosition

writeIndex

Method Detail

bindWriter

void bindWriter(UnionWriterImpl writer)

setNull

void setNull()

hasType

boolean hasType(TypeProtos.MinorType type)

member

ObjectWriter member(TypeProtos.MinorType type)

Return an existing writer for the given type, or create a new one if needed.

Parameters:

type - desired variant type

Returns:

a writer for that type

setType

void setType(TypeProtos.MinorType type)

lastWriteIndex

int lastWriteIndex()

Description copied from interface: WriterPosition

Return the last write position in the vector. This may be the same as the writer index position (if the vector was written at that point), or an earlier point. In either case, this value points to the last valid value in the vector.

Specified by:

lastWriteIndex in interface WriterPosition

Returns:

index of the last valid value in the vector

rowStartIndex

int rowStartIndex()

Description copied from interface: WriterPosition

Position within the vector of the first value for the current row. Note that this is always the first value for the row, even for a writer deeply nested within a hierarchy of arrays. (The first position for the current array is not exposed in this API.)

Specified by:

rowStartIndex in interface WriterPosition

Returns:

the vector offset of the first value for the current row

addMember

AbstractObjectWriter addMember(ColumnMetadata colSchema)

addMember

AbstractObjectWriter addMember(TypeProtos.MinorType type)

addMember

void addMember(AbstractObjectWriter colWriter)