Package org.apache.druid.segment

Interface RowAdapter<RowType>

All Known Implementing Classes:
ListBasedInputRowAdapter
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 Details

    • 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.