Package org.apache.druid.frame.write.columnar

Class ColumnarFrameWriterFactory

java.lang.Object

org.apache.druid.frame.write.columnar.ColumnarFrameWriterFactory

All Implemented Interfaces:

FrameWriterFactory

public class ColumnarFrameWriterFactory
extends Object
implements FrameWriterFactory

Constructor Summary

Constructors

Constructor	Description
ColumnarFrameWriterFactory(MemoryAllocatorFactory allocatorFactory, RowSignature signature, List<KeyColumn> keyColumns)	Create a ColumnarFrameWriterFactory.

Method Summary

Modifier and Type	Method	Description
long	allocatorCapacity()
FrameType	frameType()
FrameWriter	newFrameWriter(ColumnSelectorFactory columnSelectorFactory)	Create a writer where FrameWriter.addSelection() adds the current row from a ColumnSelectorFactory.
RowSignature	signature()

Methods inherited from class java.lang.Object

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

Constructor Details

ColumnarFrameWriterFactory

public ColumnarFrameWriterFactory(MemoryAllocatorFactory allocatorFactory,
 RowSignature signature,
 List<KeyColumn> keyColumns)

Create a ColumnarFrameWriterFactory.

Parameters:

allocatorFactory - memory allocator; will use as much as possible

signature - output signature for this frame writer

keyColumns - columns to sort by, if any. May be empty.

Throws:

UnsupportedColumnTypeException - if "signature" contains any type that we cannot handle

Method Details

newFrameWriter

public FrameWriter newFrameWriter(ColumnSelectorFactory columnSelectorFactory)

Description copied from interface: FrameWriterFactory

Create a writer where FrameWriter.addSelection() adds the current row from a ColumnSelectorFactory.

Specified by:

newFrameWriter in interface FrameWriterFactory

allocatorCapacity

public long allocatorCapacity()

Specified by:

allocatorCapacity in interface FrameWriterFactory

signature

public RowSignature signature()

Specified by:

signature in interface FrameWriterFactory

frameType

public FrameType frameType()

Specified by:

frameType in interface FrameWriterFactory