org.apache.flink.streaming.api.functions.windowing.delta

类 EuclideanDistance<DATA>

java.lang.Object

org.apache.flink.streaming.api.functions.windowing.delta.ExtractionAwareDeltaFunction<DATA,double[]>

org.apache.flink.streaming.api.functions.windowing.delta.EuclideanDistance<DATA>

类型参数:

DATA - The input data type. This delta function works with a double[], but can extract/convert to it from any other given object in case the respective extractor has been set. See ExtractionAwareDeltaFunction for more information.

所有已实现的接口:

Serializable, DeltaFunction<DATA>

@PublicEvolving
public class EuclideanDistance<DATA>
extends ExtractionAwareDeltaFunction<DATA,double[]>

This delta function calculates the euclidean distance between two given points.

Euclidean distance: http://en.wikipedia.org/wiki/Euclidean_distance

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
EuclideanDistance()
EuclideanDistance(Extractor<DATA,double[]> converter)

方法概要

限定符和类型	方法和说明
double	getNestedDelta(double[] oldDataPoint, double[] newDataPoint) This method is exactly the same as DeltaFunction.getDelta(Object, Object) except that it gets the result of the previously done extractions as input.

从类继承的方法 org.apache.flink.streaming.api.functions.windowing.delta.ExtractionAwareDeltaFunction

getDelta

从类继承的方法 java.lang.Object

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

构造器详细资料

EuclideanDistance

public EuclideanDistance()

EuclideanDistance

public EuclideanDistance(Extractor<DATA,double[]> converter)

方法详细资料

getNestedDelta

public double getNestedDelta(double[] oldDataPoint,
                             double[] newDataPoint)

从类复制的说明: ExtractionAwareDeltaFunction

This method is exactly the same as DeltaFunction.getDelta(Object, Object) except that it gets the result of the previously done extractions as input. Therefore, this method only does the actual calculation of the delta but no data extraction or conversion.

指定者:

getNestedDelta 在类中 ExtractionAwareDeltaFunction<DATA,double[]>

参数:

oldDataPoint - the older data point.

newDataPoint - the new data point.

返回:

the delta between the two points.