# Package org.eclipse.viatra.query.runtime.matchers.aggregators

- Class Summary
  Class | Description
  --- | ---
  count | An aggregator to count the number of matches a pattern has.
  DoubleSumOperator | Incrementally computes the sum of java.lang.Double values
  ExtremumOperator<T extends java.lang.Comparable<T>> | Incrementally computes the minimum or maximum of java.lang.Comparable values, using the default comparison
  IntegerSumOperator | Incrementally computes the sum of java.lang.Integer values
  LongSumOperator | Incrementally computes the sum of java.lang.Long values
  max | This aggregator calculates the maximum value of a selected aggregate parameter of a called pattern.
  min | This aggregator calculates the minimum value of a selected aggregate parameter of a called pattern.
  sum | This aggregator calculates the sum of the values of a selected aggregate parameter of a called pattern.

- Enum Summary
  Enum | Description
  --- | ---
  ExtremumOperator.Extreme |