RecordExtractor (Pinot Service Provider Interface 0.12.1 API)

Type Parameters:

T - The format of the input record

All Superinterfaces:

Serializable

All Known Implementing Classes:

BaseRecordExtractor
```
public interface RecordExtractor<T>
extends Serializable
```
Extracts fields from input records 1) Number/String/ByteBuffer become single-value column 2) Collections become Object[] i.e. multi-value column 3) Nested/Complex fields (e.g. json maps, avro maps, avro records) become Map

Method Summary

Modifier and Type	Method	Description
`Object`	`convert(Object value)`	Converts a field of the given input record.
`GenericRow`	`extract(T from, GenericRow to)`	Extracts fields as listed in the sourceFieldNames from the given input record and sets them into the GenericRow
`void`	`init(Set<String> fields, RecordExtractorConfig recordExtractorConfig)`	Initialize the record extractor with its config

- Method Detail
  - init
```
void init(@Nullable
          Set<String> fields,
          RecordExtractorConfig recordExtractorConfig)
```
    Initialize the record extractor with its config
    
    Parameters:
    
    fields - List of field names to extract from the provided input record. If null or empty, extracts all fields.
    
    recordExtractorConfig - The record extractor config
  - extract
```
GenericRow extract(T from,
                   GenericRow to)
```
    Extracts fields as listed in the sourceFieldNames from the given input record and sets them into the GenericRow
    
    Parameters:
    
    from - The input record
    
    to - The output GenericRow
    
    Returns:
    
    The output GenericRow
  - convert
```
@Nullable
Object convert(Object value)
```
    Converts a field of the given input record. The field value will be converted to either a single value (string, number, byte[]), multi value (Object[]) or a Map. Natively Pinot only understands single values and multi values. Map is useful only if some ingestion transform functions operates on it in the transformation layer.
    
    Parameters:
    
    value - the field value to be converted
    
    Returns:
    
    The converted field value. Returns null for empty array/collection/map.