Package uk.ac.starlink.topcat

Class BitsRowSubset

java.lang.Object
uk.ac.starlink.topcat.RowSubset
uk.ac.starlink.topcat.BitsRowSubset
public class BitsRowSubset extends RowSubset
A RowSubset which maintains the inclusion status of each row as a separate flag.
Author:
Mark Taylor (Starlink)

  • Constructor Details

    • BitsRowSubset

      public BitsRowSubset(String name, BitSet bits, boolean invert)
      Constructs a new row subset with a given BitSet, name and sense. The invert argument indicates whether the sense of the bit set is to be reversed prior to interpretation.
      Parameters:
      name - subset name
      bits - flag vector
      invert - whether to invert the bits from the BitSet

    • BitsRowSubset

      public BitsRowSubset(String name, BitSet bits)
      Constructs a new row subset with a given BitSet and name. Same as BitsRowSubset(name,bits,false)
      Parameters:
      name - subset name
      bits - flag vector

  • Method Details

    • getBitSet

      public BitSet getBitSet()
      Returns the BitSet object used to store the inclusion status flags.
      Returns:
      flag vector

    • getInvert

      public boolean getInvert()
      Returns the inversion sense of the inclusion flags represented by this subset relative to the bit set.
      Returns:
      true iff bitset bits are inverted to give inclusion flag

    • isIncluded

      public boolean isIncluded(long lrow)
      Description copied from class: RowSubset
      Indicates whether a given row is in the subset or not.
      Specified by:
      isIncluded in class RowSubset
      Parameters:
      lrow - the index of the row in question
      Returns:
      true iff row lrow is to be included