Package org.apache.datasketches.tuple.arrayofdoubles

Class ArrayOfDoublesIntersection

java.lang.Object
org.apache.datasketches.tuple.arrayofdoubles.ArrayOfDoublesIntersection
public abstract class ArrayOfDoublesIntersection extends Object
Computes the intersection of two or more tuple sketches of type ArrayOfDoubles. A new instance represents the Universal Set. Every update() computes an intersection with the internal set and can only reduce the internal set.

  • Method Details

    • intersect

      public void intersect(ArrayOfDoublesSketch tupleSketch, ArrayOfDoublesCombiner combiner)
      Performs a stateful intersection of the internal set with the given tupleSketch. The given tupleSketch and the internal state must have the same numValues.
      Parameters:
      tupleSketch - Input sketch to intersect with the internal set.
      combiner - Method of combining two arrays of double values

    • getResult

      public ArrayOfDoublesCompactSketch getResult()
      Gets the internal set as an on-heap compact sketch.
      Returns:
      Result of the intersections so far as a compact sketch.

    • getResult

      public ArrayOfDoublesCompactSketch getResult(org.apache.datasketches.memory.WritableMemory dstMem)
      Gets the result of stateful intersections so far.
      Parameters:
      dstMem - Memory for the compact sketch (can be null).
      Returns:
      Result of the intersections so far as a compact sketch.

    • reset

      public void reset()
      Resets the internal set to the initial state, which represents the Universal Set