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

Class MapReader

java.lang.Object

org.apache.drill.exec.vector.accessor.reader.AbstractTupleReader

org.apache.drill.exec.vector.accessor.reader.MapReader

All Implemented Interfaces:

ColumnReader, ReaderEvents, TupleReader

public class MapReader
extends AbstractTupleReader

Reader for a Drill Map type. Maps are actually tuples, just like rows.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.vector.accessor.reader.AbstractTupleReader

AbstractTupleReader.TupleObjectReader

Field Summary

Fields

Modifier and Type	Field	Description
protected final ColumnMetadata	schema

Fields inherited from class org.apache.drill.exec.vector.accessor.reader.AbstractTupleReader

nullStateReader, readers

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MapReader(ColumnMetadata schema, AbstractObjectReader[] readers)
protected	MapReader(ColumnMetadata schema, VectorAccessor mapAccessor, AbstractObjectReader[] readers)

Method Summary

Modifier and Type	Method	Description
void	bindIndex(ColumnReaderIndex index)
static AbstractObjectReader	build(ColumnMetadata schema, VectorAccessor mapAccessor, List<AbstractObjectReader> readers)
static AbstractTupleReader.TupleObjectReader	build(ColumnMetadata schema, VectorAccessor mapAccessor, AbstractObjectReader[] readers)
ColumnMetadata	schema()
TupleMetadata	tupleSchema()

Methods inherited from class org.apache.drill.exec.vector.accessor.reader.AbstractTupleReader

array, array, bindBuffer, bindNullState, column, column, columnCount, dict, dict, getAsString, getObject, isNull, nullStateReader, reposition, scalar, scalar, tuple, tuple, type, type, type, variant, variant

Methods inherited from class java.lang.Object

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

Field Details

schema

protected final ColumnMetadata schema

Constructor Details

MapReader

protected MapReader(ColumnMetadata schema,
 AbstractObjectReader[] readers)

MapReader

protected MapReader(ColumnMetadata schema,
 VectorAccessor mapAccessor,
 AbstractObjectReader[] readers)

Method Details

build

public static AbstractTupleReader.TupleObjectReader build(ColumnMetadata schema,
 VectorAccessor mapAccessor,
 AbstractObjectReader[] readers)

build

public static AbstractObjectReader build(ColumnMetadata schema,
 VectorAccessor mapAccessor,
 List<AbstractObjectReader> readers)

bindIndex

public void bindIndex(ColumnReaderIndex index)

Specified by:

bindIndex in interface ReaderEvents

Overrides:

bindIndex in class AbstractTupleReader

schema

public ColumnMetadata schema()

tupleSchema

public TupleMetadata tupleSchema()