Package org.apache.drill.exec.store.easy.json.loader

Interface FieldFactory

All Known Implementing Classes:
BaseFieldFactory, ExtendedTypeFieldFactory, InferredFieldFactory, ProvidedFieldFactory
public interface FieldFactory
Extensible mechanism to build fields for a JSON object (a Drill row or Map).

  • Method Details

    • fieldParser

      ElementParser fieldParser(FieldDefn fieldDefn)
      Create a parser for a field. The caller will add the field to the parent object. Called only for projected fields. May add a "deferred" undefined field if the value type is undefined. Such fields are added to the underlying row or map at a later time.

    • ignoredFieldParser

      ElementParser ignoredFieldParser()

    • forceNullResolution

      ElementParser forceNullResolution(FieldDefn fieldDefn)

    • forceArrayResolution

      ElementParser forceArrayResolution(FieldDefn fieldDefn)

    • scalarParserFor

      ValueParser scalarParserFor(FieldDefn fieldDefn, ColumnMetadata colSchema)
      Internal method which allows a custom parser (such as for extended types) to provide the scalar parser for a provided schema.