io.kgraph.streaming

Interface EdgeReduceFunction<EV>

Type Parameters:

EV - the edge value type

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface EdgeReduceFunction<EV>

Interface to be implemented by the function applied to a vertex neighborhood in the KGraphWindowedStream.reduceOnEdges(EdgeReduceFunction) method.

Method Summary

Modifier and Type	Method and Description
EV	reduceEdges(EV firstEdgeValue, EV secondEdgeValue) Combines two edge values into one value of the same type.

Method Detail

reduceEdges

EV reduceEdges(EV firstEdgeValue,
               EV secondEdgeValue)

Combines two edge values into one value of the same type. The reduceEdges function is consecutively applied to all pairs of edges of a neighborhood, until only a single value remains.

Parameters:

firstEdgeValue - the value of the first edge

secondEdgeValue - the value of the second edge

Returns:

The data stream that is the result of applying the reduceEdges function to the graph window.