Package org.apache.drill.exec.store.pojo

Class AbstractPojoWriter<V extends ValueVector>

java.lang.Object

org.apache.drill.exec.store.pojo.AbstractPojoWriter<V>

All Implemented Interfaces:

PojoWriter

Direct Known Subclasses:

PojoWriters.BitWriter, PojoWriters.DecimalWriter, PojoWriters.DoubleWriter, PojoWriters.EnumWriter, PojoWriters.FloatWriter, PojoWriters.IntWriter, PojoWriters.LongWriter, PojoWriters.NBigIntWriter, PojoWriters.NBooleanWriter, PojoWriters.NDoubleWriter, PojoWriters.NFloatWriter, PojoWriters.NIntWriter, PojoWriters.NTimeStampWriter, PojoWriters.StringWriter

public abstract class AbstractPojoWriter<V extends ValueVector>
extends Object
implements PojoWriter

Parent class for all pojo writers created for each field. Contains common logic for initializing value vector, stores field name and its type.

Field Summary

Fields

Modifier and Type	Field	Description
protected V	vector

Constructor Summary

Constructors

Constructor	Description
AbstractPojoWriter(String fieldName, TypeProtos.MajorType type)

Method Summary

Modifier and Type	Method	Description
void	allocate()	Allocates new buffer for value vector.
void	cleanup()	Performs clean up if needed.
void	init(OutputMutator output)	Initializes value vector.
void	setValueCount(int valueCount)	Sets number of written records.

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.store.pojo.PojoWriter

writeField

Field Details

vector

protected V extends ValueVector vector

Constructor Details

AbstractPojoWriter

public AbstractPojoWriter(String fieldName,
 TypeProtos.MajorType type)

Method Details

init

public void init(OutputMutator output)
          throws SchemaChangeException

Description copied from interface: PojoWriter

Initializes value vector.

Specified by:

init in interface PojoWriter

Parameters:

output - output mutator

Throws:

SchemaChangeException

allocate

public void allocate()

Description copied from interface: PojoWriter

Allocates new buffer for value vector.

Specified by:

allocate in interface PojoWriter

setValueCount

public void setValueCount(int valueCount)

Description copied from interface: PojoWriter

Sets number of written records.

Specified by:

setValueCount in interface PojoWriter

Parameters:

valueCount - record count

cleanup

public void cleanup()

Description copied from interface: PojoWriter

Performs clean up if needed.

Specified by:

cleanup in interface PojoWriter