org.apache.druid.segment

Interface RowAdapter<RowType>

public interface RowAdapter<RowType>

An adapter between arbitrary types and the needs of callers that want to read specific columns out of those types (treating them as rows).

Method Summary

Modifier and Type	Method and Description
Function<RowType,Object>	columnFunction(String columnName) Returns a function that retrieves the value for column "columnName" from rows.
default ToLongFunction<RowType>	timestampFunction() Returns a function that retrieves timestamps from rows.

Method Detail

timestampFunction

default ToLongFunction<RowType> timestampFunction()

Returns a function that retrieves timestamps from rows. The default implementation delegates to columnFunction(java.lang.String) and expects it to already contain long-typed values or nulls. Nulls, if present, will be converted to zeroes.

columnFunction

Function<RowType,Object> columnFunction(String columnName)

Returns a function that retrieves the value for column "columnName" from rows.