Package uk.ac.starlink.ttools.filter

Class 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 Detail

      • RandomViewFilter

        public RandomViewFilter()

    • Method Detail

      • createStep

        public ProcessingStep createStep​(java.util.Iterator<java.lang.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 java.io.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:
        java.io.IOException