Trait/Object

org.locationtech.geomesa.utils.stats

Stat

Related Docs: object Stat | package stats

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trait Stat extends AnyRef

Stats used by the StatsIterator to compute various statistics server-side for a given query.

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Type Members

  1. abstract type S <: Stat

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Abstract Value Members

  1. abstract def +(other: S): S

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    Combine two stats into a new stat

    Combine two stats into a new stat

    other

    the other stat to add

  2. abstract def +=(other: S): Unit

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    Add another stat to this stat.

    Add another stat to this stat. Avoids allocating another object.

    other

    the other stat to add

  3. abstract def clear(): Unit

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    Clears the stat to its original state when first initialized.

    Clears the stat to its original state when first initialized. Necessary method used by the StatIterator.

  4. abstract def isEmpty: Boolean

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    Necessary method used by the StatIterator.

    Necessary method used by the StatIterator. Indicates if the stat has any values or not

    returns

    true if stat contains values

  5. abstract def isEquivalent(other: Stat): Boolean

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    Compares the two stats for equivalence.

    Compares the two stats for equivalence. We don't use standard 'equals' as it gets messy with mutable state and hash codes

    other

    other stat to compare

    returns

    true if equals

  6. abstract def observe(sf: SimpleFeature): Unit

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    Compute statistics based upon the given simple feature.

    Compute statistics based upon the given simple feature. This method will be called for every SimpleFeature a query returns.

    sf

    feature to evaluate

  7. abstract def sft: SimpleFeatureType

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    The simple feature type that this stat operates on

  8. abstract def toJsonObject: Any

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    Returns a representation of the Stat to be serialized

    Returns a representation of the Stat to be serialized

    This function should return a representation (view) of the Stat to be serialized as JSON. Instances of Map can be used to represent JSON dictionaries or Seq for JSON arrays. A collection.SortedMap such as collection.immutable.ListMap is recommended if key order should be deterministic. Other types may be used but could require the creation and registration of custom serializers dependent on the JSON framework being utilized (currently Gson).

    returns

    stat as a json serializable object

  9. abstract def unobserve(sf: SimpleFeature): Unit

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    Tries to remove the given simple feature from the compiled statistics.

    Tries to remove the given simple feature from the compiled statistics. Note: may not be possible to un-observe a feature, in which case this method will have no effect.

    sf

    feature to un-evaluate

Concrete Value Members

  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. def +(other: Stat)(implicit d: DummyImplicit): Stat

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    Non type-safe add - if stats are not the same type, will throw an exception

    Non type-safe add - if stats are not the same type, will throw an exception

    other

    the other stat to add

  4. def +=(other: Stat)(implicit d: DummyImplicit): Unit

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    Non type-safe add - if stats are not the same type, will throw an exception

    Non type-safe add - if stats are not the same type, will throw an exception

    other

    the other stat to add

  5. final def ==(arg0: Any): Boolean

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  6. final def asInstanceOf[T0]: T0

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  7. def clone(): AnyRef

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  8. final def eq(arg0: AnyRef): Boolean

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  9. def equals(arg0: Any): Boolean

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  10. def finalize(): Unit

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  11. final def getClass(): Class[_]

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  12. def hashCode(): Int

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  13. final def isInstanceOf[T0]: Boolean

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  14. final def ne(arg0: AnyRef): Boolean

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  15. final def notify(): Unit

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  16. final def notifyAll(): Unit

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  17. final def synchronized[T0](arg0: ⇒ T0): T0

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  18. def toJson: String

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    Returns a JSON representation of the Stat

    Returns a JSON representation of the Stat

    returns

    stat as a json string

  19. def toString(): String

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  20. final def wait(): Unit

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    @throws( ... )
  21. final def wait(arg0: Long, arg1: Int): Unit

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  22. final def wait(arg0: Long): Unit

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