Package org.apache.druid.query.aggregation

Class AbstractSerializablePairLongObjectColumnSerializer<T extends SerializablePair<Long,?>>

java.lang.Object

org.apache.druid.query.aggregation.AbstractSerializablePairLongObjectColumnSerializer<T>

All Implemented Interfaces:

GenericColumnSerializer<T>, Serializer

Direct Known Subclasses:

SerializablePairLongDoubleColumnSerializer, SerializablePairLongFloatColumnSerializer, SerializablePairLongLongColumnSerializer, SerializablePairLongStringColumnSerializer

public abstract class AbstractSerializablePairLongObjectColumnSerializer<T extends SerializablePair<Long,?>>
extends Object
implements GenericColumnSerializer<T>

valid call sequence

open()+serialize()*(getSerializedSize()|writeTo())*

getSerializedSize() / writeTo() effectively function as a close call, but each may be called multiple times and has no effect on one another.

Field Summary

Fields

Modifier and Type	Field	Description
StagedSerde<T>	stagedSerde

Method Summary

Modifier and Type	Method	Description
long	getSerializedSize()	Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.
void	serialize(ColumnValueSelector<? extends T> selector)
void	writeTo(WritableByteChannel channel, FileSmoosher smoosher)	Writes the serialized form of this object.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.segment.GenericColumnSerializer

open

Field Detail

stagedSerde

public final StagedSerde<T extends SerializablePair<Long,?>> stagedSerde

Method Detail

serialize

public void serialize(ColumnValueSelector<? extends T> selector)
               throws IOException

Specified by:

serialize in interface GenericColumnSerializer<T extends SerializablePair<Long,?>>

Throws:

IOException

getSerializedSize

public long getSerializedSize()
                       throws IOException

Description copied from interface: Serializer

Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.

Specified by:

getSerializedSize in interface Serializer

Throws:

IOException

writeTo

public void writeTo(WritableByteChannel channel,
                    FileSmoosher smoosher)
             throws IOException

Description copied from interface: Serializer

Writes the serialized form of this object. The entire object may be written to the provided channel, or the object may be split over the provided channel and files added to the {@link FileSmoosher], where additional channels can be created via FileSmoosher.addWithSmooshedWriter(String, long). The latter approach is useful when the serialized form of the object is too large for a single smoosh container. At the time this javadoc was written, the max smoosh container size is limit to the max ByteBuffer size.

Specified by:

writeTo in interface Serializer

Throws:

IOException