Package com.amazonaws.athena.connectors.neptune.propertygraph.rowwriters

Class FieldValueNormalizer

java.lang.Object

com.amazonaws.athena.connectors.neptune.propertygraph.rowwriters.FieldValueNormalizer

public final class FieldValueNormalizer
extends Object

Normalizes Gremlin result field values so row writers can handle both valueMap-style results (Map with ArrayList values) and project().by()-style results (Map with scalar or Map values) without ClassCastException.

Method Summary

Modifier and Type	Method	Description
static List<Object>	toValueList(Object fieldValue)	Converts a raw field value from a Gremlin result into a list suitable for row writers.

Methods inherited from class java.lang.Object

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

Method Detail

toValueList

public static List<Object> toValueList(Object fieldValue)

Converts a raw field value from a Gremlin result into a list suitable for row writers. Handles: valueMap() lists, project().by() scalars, and .by(valueMap()) Map values (e.g. all_properties).

Parameters:

fieldValue - raw value (may be List, Map, scalar, or null)

Returns:

null if fieldValue is null; otherwise a list of one or more elements that can be read by row writers (Map is serialized to string)