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

Class MapWriter.DummyMapWriter

java.lang.Object

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

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

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

All Implemented Interfaces:

ColumnWriter, TupleWriter, WriterEvents, WriterPosition

Enclosing class:

MapWriter

protected static class MapWriter.DummyMapWriter
extends MapWriter

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.vector.accessor.writer.MapWriter

MapWriter.ArrayMapWriter, MapWriter.DummyArrayMapWriter, MapWriter.DummyMapWriter, MapWriter.SingleMapWriter

Nested classes/interfaces inherited from class org.apache.drill.exec.vector.accessor.writer.AbstractTupleWriter

AbstractTupleWriter.TupleObjectWriter, AbstractTupleWriter.TupleWriterListener

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

TupleWriter.UndefinedColumnException

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

WriterEvents.ColumnWriterListener, WriterEvents.State

Field Summary

Fields inherited from class org.apache.drill.exec.vector.accessor.writer.MapWriter

mapColumnSchema

Fields inherited from class org.apache.drill.exec.vector.accessor.writer.AbstractTupleWriter

childIndex, listener, logger, state, tupleSchema, vectorIndex, writers

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DummyMapWriter(ColumnMetadata schema, List<AbstractObjectWriter> writers)

Method Summary

Modifier and Type	Method and Description
void	copy(ColumnReader from) Copy a single value from the given reader, which must be of the same type as this writer.
boolean	isProjected() Whether this writer is projected (is backed by a materialized vector), or is unprojected (is just a dummy writer.) In most cases, clients can ignore whether the column is projected and just write to the writer.

Methods inherited from class org.apache.drill.exec.vector.accessor.writer.MapWriter

buildMap, buildMapArray, buildMapWriter, buildMapWriter, schema

Methods inherited from class org.apache.drill.exec.vector.accessor.writer.AbstractTupleWriter

addColumn, addColumn, addColumnWriter, array, array, bindIndex, bindIndex, bindListener, bindListener, column, column, dict, dict, dump, endArrayValue, endWrite, isProjected, lastWriteIndex, listener, nullable, postRollover, preRollover, restartRow, rowStartIndex, saveRow, scalar, scalar, set, setNull, setObject, size, startRow, startWrite, tuple, tuple, tupleSchema, type, type, type, variant, variant, writeIndex

Methods inherited from class java.lang.Object

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

Constructor Detail

DummyMapWriter

protected DummyMapWriter(ColumnMetadata schema,
                         List<AbstractObjectWriter> writers)

Method Detail

isProjected

public boolean isProjected()

Description copied from interface: ColumnWriter

Whether this writer is projected (is backed by a materialized vector), or is unprojected (is just a dummy writer.) In most cases, clients can ignore whether the column is projected and just write to the writer. This flag handles those special cases where it is helpful to know if the column is projected or not.

Specified by:

isProjected in interface ColumnWriter

Overrides:

isProjected in class AbstractTupleWriter

copy

public void copy(ColumnReader from)

Description copied from interface: ColumnWriter

Copy a single value from the given reader, which must be of the same type as this writer.

Specified by:

copy in interface ColumnWriter

Overrides:

copy in class AbstractTupleWriter

Parameters:

from - reader to provide the data