Interface UserDataReader


public interface UserDataReader
Reader that can interrogate a RowData to return the coordinate and mask values specified by a DataSpec. It is applied to a RowData obtained from the DataSpec's source table.

Instances of this object are not expected to be usable from multiple concurrent threads.

Since:
10 Feb 2013
Author:
Mark Taylor
See Also:
  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    getMaskFlag(uk.ac.starlink.table.RowData rdata, long irow)
    Returns the mask flag for a row.
    getUserCoordValues(uk.ac.starlink.table.RowData rdata, long irow, int icoord)
    Returns a user coordinate value array for a given coordinate in a row.
  • Method Details

    • getMaskFlag

      boolean getMaskFlag(uk.ac.starlink.table.RowData rdata, long irow) throws IOException
      Returns the mask flag for a row.
      Parameters:
      rdata - row data for the row
      irow - row index of the row
      Returns:
      true iff the row of interest is included in the data set
      Throws:
      IOException
    • getUserCoordValues

      Object[] getUserCoordValues(uk.ac.starlink.table.RowData rdata, long irow, int icoord) throws IOException
      Returns a user coordinate value array for a given coordinate in a row. The returned value is an array which may be re-used, so it should not be assumed to retain its contents between calls to this method.
      Parameters:
      rdata - row data
      irow - row index corresponding to the row
      icoord - coordinate index to read
      Returns:
      array of user values (not storage values) for the specified coordinate at the row of interest
      Throws:
      IOException