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

Class BitColumnReader

java.lang.Object

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

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

org.apache.drill.exec.vector.accessor.reader.BaseScalarReader.BaseFixedWidthReader

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

All Implemented Interfaces:

ColumnReader, ReaderEvents, ScalarReader

public class BitColumnReader
extends BaseScalarReader.BaseFixedWidthReader

Specialized reader for bit columns. Bits are packed 8 per byte. Rather than duplicate that logic here, this reader just delegates to the vector's own accessor.

Nested Class Summary

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

BaseScalarReader.BaseFixedWidthReader, BaseScalarReader.BaseVarWidthReader, BaseScalarReader.BufferAccessor

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

AbstractScalarReader.NullReader, AbstractScalarReader.ScalarObjectReader

Field Summary

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

bufferAccessor, schema, vectorAccessor

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

nullStateReader, vectorIndex

Constructor Summary

Constructors

Constructor	Description
BitColumnReader()

Method Summary

Modifier and Type	Method	Description
boolean	getBoolean()
int	getInt()
ValueType	valueType()	Describe the type of the value.
int	width()

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

offsetIndex

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

bindBuffer, bindIndex, bindVector, buffer, bufferAccessor, buildOptional, buildRequired, schema

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

bindNullState, conversionError, extendedType, getAsString, getBytes, getDate, getDecimal, getDouble, getFloat, getLong, getObject, getPeriod, getString, getTime, getTimestamp, getValue, isNull, nullReader, nullStateReader, reposition, type

Methods inherited from class java.lang.Object

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

Constructor Details

BitColumnReader

public BitColumnReader()

Method Details

valueType

public ValueType valueType()

Description copied from interface: ScalarReader

Describe the type of the value. This is a compression of the value vector type: it describes which method will return the vector value.

Returns:

the value type which indicates which get method is valid for the column

width

public int width()

Specified by:

width in class BaseScalarReader.BaseFixedWidthReader

getBoolean

public boolean getBoolean()

Specified by:

getBoolean in interface ScalarReader

Overrides:

getBoolean in class AbstractScalarReader

getInt

public int getInt()

Specified by:

getInt in interface ScalarReader

Overrides:

getInt in class AbstractScalarReader