FieldWriter (druid-processing 30.0.1 API)

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

ComplexFieldWriter, DoubleFieldWriter, FloatFieldWriter, LongFieldWriter, NumericArrayFieldWriter, NumericFieldWriter, StringArrayFieldWriter, StringFieldWriter
```
public interface FieldWriter
extends Closeable
```
Helper used to write field values to row-based frames or RowKey. Most callers should use FrameWriters to build frames from ColumnSelectorFactory, rather than using this interface directly. Not thread-safe.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	Releases resources held by this writer.
`long`	`writeTo(org.apache.datasketches.memory.WritableMemory memory, long position, long maxSize)`	Writes the current selection at the given memory position.

- Method Detail
  - writeTo
```
long writeTo(org.apache.datasketches.memory.WritableMemory memory,
             long position,
             long maxSize)
```
    Writes the current selection at the given memory position.
    
    Parameters:
    
    memory - memory region in little-endian order
    
    position - position to write
    
    maxSize - maximum number of bytes to write
    
    Returns:
    
    number of bytes written, or -1 if "maxSize" was not enough memory
  - close
```
void close()
```
    Releases resources held by this writer.
    
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Closeable