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 and Description
ColumnarFrameWriterFactory(MemoryAllocator allocator, RowSignature signature, List<SortColumn> sortColumns) Create a ColumnarFrameWriterFactory.

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnarFrameWriterFactory

public ColumnarFrameWriterFactory(MemoryAllocator allocator,
                                  RowSignature signature,
                                  List<SortColumn> sortColumns)

Create a ColumnarFrameWriterFactory.

Parameters:

allocator - memory allocator; will use as much as possible

signature - output signature for this frame writer

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

Throws:

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

Method Detail

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