Package uk.ac.starlink.ttools.filter

Class RandomViewFilter

java.lang.Object
uk.ac.starlink.ttools.filter.BasicFilter
uk.ac.starlink.ttools.filter.RandomViewFilter
All Implemented Interfaces:
ProcessingFilter, ProcessingStep
public class RandomViewFilter extends BasicFilter implements ProcessingStep
Processing filter that makes sure any RowSequence taken out on a table uses calls to random table access methods. This will obviously cause an error if the table being filtered does not have random access. Only really likely to be used for debugging purposes.
Since:
7 Mar 2005
Author:
Mark Taylor (Starlink)

  • Constructor Details

    • RandomViewFilter

      public RandomViewFilter()

  • Method Details

    • getDescriptionLines

      protected String[] getDescriptionLines()
      Specified by:
      getDescriptionLines in class BasicFilter

    • createStep

      public ProcessingStep createStep(Iterator<String> argIt)
      Description copied from interface: ProcessingFilter
      Creates a new ProcessingStep based on a sequence of command-line arguments. The argIt argument is an iterator over the command-line arguments positioned just before any arguments intended for this filter. If legal, any that can be comprehended by this filter should be read (iterated over) and removed, and a ProcessingStep should accordingly be returned. In the case of a successful return, it is essential that no arguments other than the ones intended for this filter are read from the iterator.

      If the argument list is badly-formed as far as this filter is concerned, an ArgException should be thrown.

      Specified by:
      createStep in interface ProcessingFilter
      Parameters:
      argIt - iterator over command-line arguments positioned at the first one

    • wrap

      public uk.ac.starlink.table.StarTable wrap(uk.ac.starlink.table.StarTable base) throws IOException
      Description copied from interface: ProcessingStep
      Performs a table filtering step.
      Specified by:
      wrap in interface ProcessingStep
      Parameters:
      base - input table
      Returns:
      output table
      Throws:
      IOException