Interface ServiceOperation


public interface ServiceOperation
Defines an operation which turns an input tuple into an output tuple. Suitable for use with MultiServiceColumnCalculator.
Since:
14 Oct 2011
Author:
Mark Taylor
  • Method Summary

    Modifier and Type
    Method
    Description
    Calculates the output tuple for a given input tuple.
    uk.ac.starlink.table.StarTable
    Returns the metadata-only table describing the rows which will be returned by this operation.
  • Method Details

    • getResultMetadata

      uk.ac.starlink.table.StarTable getResultMetadata()
      Returns the metadata-only table describing the rows which will be returned by this operation. Used for passing to TableSink.acceptMetadata(uk.ac.starlink.table.StarTable). Its data must not be read.
      Returns:
      data-less table
    • calculateRow

      Object[] calculateRow(Object[] tuple) throws IOException
      Calculates the output tuple for a given input tuple.
      Parameters:
      tuple - input tuple
      Returns:
      output tuple, corresponding to this object's declared metadata
      Throws:
      IOException