FeatureReducer

Client-side reduce for the results of a scan. Must have a zero-arg constructor to allow re-creation from a serialized form.

Reducers are encouraged to also allow direct instantiation via an alternate constructor, as serialization is generally only used for map/reduce jobs. Similarly, state is encouraged to be lazily evaluated.

Linear Supertypes

SerializableState, AnyRef, Any

Known Subclasses

BatchReducer, DeltaReducer, FileReducer, LocalTransformReducer, StatsReducer

Abstract Value Members

abstract def apply(features: CloseableIterator[SimpleFeature]): CloseableIterator[SimpleFeature]

Reduce the results of a scan
Reduce the results of a scan
features
features
abstract def init(state: Map[String, String]): Unit

Initialize an instance after deserialization
Initialize an instance after deserialization
state
state

Definition Classes
SerializableState
abstract def state: Map[String, String]

The state used to serialize this instance
The state used to serialize this instance

Definition Classes
SerializableState

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Docs: object FeatureReducer | package QueryPlan

trait FeatureReducer extends SerializableState

Abstract Value Members

abstract def apply(features: CloseableIterator[SimpleFeature]): CloseableIterator[SimpleFeature]

abstract def init(state: Map[String, String]): Unit

abstract def state: Map[String, String]

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

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

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from SerializableState

Inherited from AnyRef

Inherited from Any

Ungrouped