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.

Object[]

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

Interface UserDataReader

Method Summary

Method Details

getMaskFlag

getUserCoordValues