Package rocks.frieler.kraftsql.testing.engine

Class CountSimulator

  • All Implemented Interfaces:
    rocks.frieler.kraftsql.testing.engine.ExpressionSimulator 
    
public final class CountSimulator<E extends Engine<E>>
extends AggregationSimulator<E, Long, Count<E>>

    Simulator for Count expressions.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private final KClass<out Count<E>> expression

    • Constructor Summary

      Constructors 
      Constructor Description
      CountSimulator()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      KClass<out Count<E>> getExpression()
      Function1<List<DataRow>, Long> simulateAggregation(Count<E> expression) Provides a Kotlin simulation of the given Expression as an aggregation to be applied to multiple DataRows.

      • Methods inherited from class rocks.frieler.kraftsql.testing.engine.AggregationSimulator

        simulateExpression

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • CountSimulator

        CountSimulator()

    • Method Detail

      • simulateAggregation

         Function1<List<DataRow>, Long> simulateAggregation(Count<E> expression)

        Provides a Kotlin simulation of the given Expression as an aggregation to be applied to multiple DataRows.

        For the Expression to aggregate multiple DataRows, it must either be an rocks.frieler.kraftsql.expressions.Aggregation, one of the groupExpressions or the same must apply to all its sub-expressions.

        Returns:

        a function that simulates the Expression