FieldWriter (AWS Athena Query Federation 2022.47.1 API)

All Known Implementing Classes:

BigIntFieldWriter, BitFieldWriter, DateDayFieldWriter, DateMilliFieldWriter, DecimalFieldWriter, Float4FieldWriter, Float8FieldWriter, IntFieldWriter, SmallIntFieldWriter, TinyIntFieldWriter, VarBinaryFieldWriter, VarCharFieldWriter
```
public interface FieldWriter
```
Used to write a value and apply constraints for a particular column to the row currently being processed. This interface enables the use of a pseudo-code generator for RowWriter which reduces object and branching overhead when translating from your source system to Apache
For example of how to use this, see ExampleRecordHandler in athena-federation-sdk.

See Also:

FieldWriter

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`write(Object context, int rowNum)`	Attempts to write a value to the Apache Arrow vector provided at construction time.

- Method Detail
  - write
```
boolean write(Object context,
              int rowNum)
       throws Exception
```
    Attempts to write a value to the Apache Arrow vector provided at construction time.
    
    Parameters:
    
    context - The context (specific to the extractor) from which to extract a value.
    
    rowNum - The row to write the value into.
    
    Returns:
    
    True if the value passed constraints and should be considered valid, False otherwise.
    
    Throws:
    
    Exception - internal exception