org.eclipse.rdf4j.sail.federation.optimizers

## Class EvaluationStatistics

- java.lang.Object
- - org.eclipse.rdf4j.sail.federation.optimizers.EvaluationStatistics

-     public class EvaluationStatistics
      extends Object

  Supplies various query model statistics to the query engine/optimizer.
  Author:
    Arjohn Kampman, James Leigh

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `protected static class` | `EvaluationStatistics.CardinalityCalculator`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected EvaluationStatistics.CardinalityCalculator` | `calculator`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `EvaluationStatistics()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected EvaluationStatistics.CardinalityCalculator` | `createCardinalityCalculator()`
    `double` | `getCardinality(TupleExpr expr)`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### calculator

          protected EvaluationStatistics.CardinalityCalculator calculator

  - ### Constructor Detail

    - #### EvaluationStatistics

          public EvaluationStatistics()

  - ### Method Detail

    - #### getCardinality

          public double getCardinality(TupleExpr expr)

    - #### createCardinalityCalculator

          protected EvaluationStatistics.CardinalityCalculator createCardinalityCalculator()

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