ColumnarFrameWriterFactory (druid-processing 28.0.0 API)

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

All Methods Instance Methods Concrete Methods
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 Detail
  - 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 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
  - signature
```
public RowSignature signature()
```
    Specified by:
    
    signature in interface FrameWriterFactory
  - frameType
```
public FrameType frameType()
```
    Specified by:
    
    frameType in interface FrameWriterFactory