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

Class UnionShim.AbstractUnionShim

java.lang.Object

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

All Implemented Interfaces:

UnionShim, WriterEvents, WriterPosition

Enclosing interface:

UnionShim

public abstract static class UnionShim.AbstractUnionShim
extends Object
implements UnionShim

Nested Class Summary

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

UnionShim.AbstractUnionShim

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

WriterEvents.ColumnWriterListener, WriterEvents.State

Field Summary

Fields

Modifier and Type	Field	Description
protected final AbstractObjectWriter[]	variants

Constructor Summary

Constructors

Constructor	Description
AbstractUnionShim()
AbstractUnionShim(AbstractObjectWriter[] variants)

Method Summary

Modifier and Type	Method	Description
void	addMemberWriter(AbstractObjectWriter colWriter)	Performs just the work of adding a vector to the list of existing variants.
boolean	hasType(TypeProtos.MinorType type)

Methods inherited from class java.lang.Object

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

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

addMember, addMember, addMember, bindWriter, isProjected, lastWriteIndex, member, rowStartIndex, setNull, setType

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

Field Details

variants

protected final AbstractObjectWriter[] variants

Constructor Details

AbstractUnionShim

public AbstractUnionShim()

AbstractUnionShim

public AbstractUnionShim(AbstractObjectWriter[] variants)

Method Details

hasType

public boolean hasType(TypeProtos.MinorType type)

Specified by:

hasType in interface UnionShim

addMemberWriter

public void addMemberWriter(AbstractObjectWriter colWriter)

Performs just the work of adding a vector to the list of existing variants. Called when adding a type via the writer, but also when the result set loader promotes a list from single type to a union, and provides this shim with the writer from the single-list shim. In the latter case, the writer is already initialized and is already part of the metadata for this list; so we don't want to call the list's addMember() and repeat those operations.

Parameters:

colWriter - the column (type) writer to add