Package org.apache.datasketches.fdt

Class Group

java.lang.Object
org.apache.datasketches.fdt.Group
All Implemented Interfaces:
Comparable<Group>
public class Group extends Object implements Comparable<Group>
Defines a Group from a Frequent Distinct Tuple query. This class is called internally during post processing and is not intended to be called by the user.
Author:
Lee Rhodes

  • Constructor Details

    • Group

      public Group()
      Construct an empty Group

  • Method Details

    • init

      public Group init(String priKey, int count, double estimate, double ub, double lb, double fraction, double rse)
      Specifies the parameters to be listed as columns
      Parameters:
      priKey - the primary key of the FDT sketch
      count - the number of retained rows associated with this group
      estimate - the estimate of the original population associated with this group
      ub - the upper bound of the estimate
      lb - the lower bound of the estimate
      fraction - the fraction of all retained rows of the sketch associated with this group
      rse - the estimated Relative Standard Error for this group.
      Returns:
      return this

    • getPrimaryKey

      public String getPrimaryKey()
      Returns:
      priKey of type T

    • getCount

      public int getCount()
      Returns:
      the count

    • getEstimate

      public double getEstimate()
      Returns:
      the estimate

    • getUpperBound

      public double getUpperBound()
      Returns:
      the upper bound

    • getLowerBound

      public double getLowerBound()
      Returns:
      the lower bound

    • getFraction

      public double getFraction()
      Returns:
      the fraction for this group

    • getRse

      public double getRse()
      Returns:
      the RSE

    • getHeader

      public String getHeader()
      Returns:
      the descriptive header

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • compareTo

      public int compareTo(Group that)
      Specified by:
      compareTo in interface Comparable<Group>
      Parameters:
      that - The Group to compare to

    • equals

      public boolean equals(Object that)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object