org.eclipse.viatra.query.runtime.base.itc.igraph

Interface IBiDirectionalGraphDataSource<V>

Type Parameters:

V - the type of the nodes in the graph

All Superinterfaces:

IGraphDataSource<V>, java.io.Serializable

All Known Implementing Classes:

Graph, IBiDirectionalWrapper

public interface IBiDirectionalGraphDataSource<V>
extends IGraphDataSource<V>

A bi-directional graph data source supports all operations that an IGraphDataSource does, but it also makes it possible to query the incoming edges of nodes, not only the outgoing edges.

Method Summary

Modifier and Type	Method and Description
java.util.Map<V,java.lang.Integer>	getSourceNodes(V target) Returns the source nodes for the given target node.

Methods inherited from interface org.eclipse.viatra.query.runtime.base.itc.igraph.IGraphDataSource

attachAsFirstObserver, attachObserver, detachObserver, getAllNodes, getTargetNodes

Method Detail

getSourceNodes

java.util.Map<V,java.lang.Integer> getSourceNodes(V target)

Returns the source nodes for the given target node. The returned data structure is a map because of potential parallel edges in the graph data source. The values in the returned map represent the count of the given (source, target) edge. The method must not return null.

Parameters:

target - the target node

Returns:

the source nodes with their count values

Since:

1.6