Package org.apache.druid.segment.data

Class CompressedColumnarLongsSupplier

java.lang.Object

org.apache.druid.segment.data.CompressedColumnarLongsSupplier

All Implemented Interfaces:

com.google.common.base.Supplier<ColumnarLongs>, Supplier<ColumnarLongs>, Serializer

public class CompressedColumnarLongsSupplier
extends Object
implements com.google.common.base.Supplier<ColumnarLongs>, Serializer

Field Summary

Fields

Modifier and Type	Field	Description
static final byte	LZF_VERSION
static final byte	VERSION

Method Summary

Modifier and Type	Method	Description
static CompressedColumnarLongsSupplier	fromByteBuffer(ByteBuffer buffer, ByteOrder order, SegmentFileMapper fileMapper)	Reads a column from a ByteBuffer, possibly using additional secondary files from a SegmentFileMapper.
ColumnarLongs	get()
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	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

Field Details

LZF_VERSION

public static final byte LZF_VERSION

See Also:

• Constant Field Values

VERSION

public static final byte VERSION

See Also:

• Constant Field Values

Method Details

get

public ColumnarLongs get()

Specified by:

get in interface com.google.common.base.Supplier<ColumnarLongs>

Specified by:

get in interface Supplier<ColumnarLongs>

getSerializedSize

public long getSerializedSize()

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

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

fromByteBuffer

public static CompressedColumnarLongsSupplier fromByteBuffer(ByteBuffer buffer,
 ByteOrder order,
 @Nullable
 SegmentFileMapper fileMapper)

Reads a column from a ByteBuffer, possibly using additional secondary files from a SegmentFileMapper.

Parameters:

buffer - primary buffer to read from

order - byte order

fileMapper - required for reading version 2 (multi-file) indexed. May be null if you know you are reading a single-file column. Generally, this should only be null in tests, not production code.