Package org.apache.sysds.runtime.compress.colgroup.indexes

Interface ColIndexFactory

public interface ColIndexFactory

  • Field Details

    • LOG

      static final org.apache.commons.logging.Log LOG

  • Method Details

    • read

      static IColIndex read(DataInput in) throws IOException
      Throws:
      IOException

    • createI

      static IColIndex createI(int... indexes)

    • create

      static IColIndex create(int[] indexes)

    • create

      static IColIndex create(IntArrayList indexes)

    • create

      static IColIndex create(int l, int u)
      Create an Index range of the given values
      Parameters:
      l - Lower bound (inclusive)
      u - Upper bound (not inclusive)
      Returns:
      An Index

    • create

      static IColIndex create(int nCol)

    • estimateMemoryCost

      static long estimateMemoryCost(int nCol, boolean contiguous)

    • combine

      static IColIndex combine(List<? extends AColGroup> gs)

    • combineIndexes

      static IColIndex combineIndexes(List<IColIndex> idx)

    • combine

      static IColIndex combine(AColGroup a, AColGroup b)

    • combine

      static IColIndex combine(IColIndex a, IColIndex b)

    • getColumnMapping

      static IColIndex getColumnMapping(IColIndex comb, IColIndex a)
      Provide a mapping from a to the combined columns shifted over to column positions in the combined. It is assumed that the caller always input an a that is contained in comb. it is not verified in the call that it is correct.
      Parameters:
      comb - The combined indexes
      a - The indexes to look up
      Returns:
      A column index mapping.