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

Class ProvidedFieldFactory

java.lang.Object

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

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

All Implemented Interfaces:

FieldFactory

public class ProvidedFieldFactory
extends BaseFieldFactory

Create a Drill field listener based on a provided schema. The schema takes precedence over the JSON syntax: the schema is expected to accurately describe what will occur for this field in the JSON input.

Field Summary

Fields inherited from class org.apache.drill.exec.store.easy.json.loader.BaseFieldFactory

child, loader

Constructor Summary

Constructors

Constructor and Description
ProvidedFieldFactory(JsonLoaderImpl loader, FieldFactory child)

Method Summary

Modifier and Type	Method and Description
ElementParser	fieldParser(FieldDefn fieldDefn) Build a column and its listener based a provided schema.
ElementParser	parserFor(FieldDefn fieldDefn)

Methods inherited from class org.apache.drill.exec.store.easy.json.loader.BaseFieldFactory

buildOuterArrays, forceArrayResolution, forceNullResolution, ignoredFieldParser, loader, multiDimObjectArrayFor, multiDimScalarArrayFor, multiDimVariantArrayParserFor, objectArrayParserFor, objectArrayParserFor, objectParserFor, objectParserFor, objectParserFor, parserFactory, repeatedListSchemaFor, scalarArrayParserFor, scalarArrayParserFor, scalarListenerFor, scalarParserFor, scalarParserFor, variantArrayParserFor, variantParserFor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProvidedFieldFactory

public ProvidedFieldFactory(JsonLoaderImpl loader,
                            FieldFactory child)

Method Detail

fieldParser

public ElementParser fieldParser(FieldDefn fieldDefn)

Build a column and its listener based a provided schema. The user is responsible to ensure that the provided schema accurately reflects the structure of the JSON being parsed.

parserFor

public ElementParser parserFor(FieldDefn fieldDefn)