Package org.apache.druid.segment

Class LongColumnSerializerV2

java.lang.Object

org.apache.druid.segment.LongColumnSerializerV2

All Implemented Interfaces:

GenericColumnSerializer<Object>, Serializer

public class LongColumnSerializerV2
extends Object
implements GenericColumnSerializer<Object>

Column Serializer for long column. The column is serialized in two parts, first a bitmap indicating the nullability of row values and second the actual row values. This class is unsafe for concurrent use from multiple threads.

Method Summary

Modifier and Type	Method	Description
static LongColumnSerializerV2	create(String columnName, SegmentWriteOutMedium segmentWriteOutMedium, String filenameBase, CompressionStrategy compression, CompressionFactory.LongEncodingStrategy encoding, BitmapSerdeFactory bitmapSerdeFactory)
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.segment.file.SegmentFileBuilder) call.
void	open()
void	serialize(ColumnValueSelector<?> selector)
void	serializeNull()	Serializes a null value at the rowCount position, and increments the current rowCount.
void	serializeValue(long val)	Serializes a value of val at the rowCount position, and increments the current rowCount.
void	writeTo(WritableByteChannel channel, SegmentFileBuilder fileBuilder)	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

Method Details

create

public static LongColumnSerializerV2 create(String columnName,
 SegmentWriteOutMedium segmentWriteOutMedium,
 String filenameBase,
 CompressionStrategy compression,
 CompressionFactory.LongEncodingStrategy encoding,
 BitmapSerdeFactory bitmapSerdeFactory)

open

public void open()
          throws IOException

Specified by:

open in interface GenericColumnSerializer<Object>

Throws:

IOException

serialize

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

Specified by:

serialize in interface GenericColumnSerializer<Object>

Throws:

IOException

serializeNull

public void serializeNull()
                   throws IOException

Serializes a null value at the rowCount position, and increments the current rowCount.

Throws:

IOException

serializeValue

public void serializeValue(long val)
                    throws IOException

Serializes a value of val at the rowCount position, and increments the current rowCount.

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.segment.file.SegmentFileBuilder) call.

Specified by:

getSerializedSize in interface Serializer

Throws:

IOException

writeTo

public void writeTo(WritableByteChannel channel,
 SegmentFileBuilder fileBuilder)
             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 SegmentFileBuilder], where additional channels can be created via SegmentFileBuilder.addWithChannel(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