org.jgrapht.alg.interfaces

Interface ShortestPathAlgorithm<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Known Implementing Classes:

AStarShortestPath, BellmanFordShortestPath, BidirectionalDijkstraShortestPath, DijkstraShortestPath, FloydWarshallShortestPaths, JohnsonShortestPaths

public interface ShortestPathAlgorithm<V,E>

An algorithm which computes shortest paths between vertices.

Author:

Dimitrios Michail

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ShortestPathAlgorithm.SingleSourcePaths<V,E> A set of paths starting from a single source vertex.

Method Summary

Modifier and Type	Method and Description
GraphPath<V,E>	getPath(V source, V sink) Get a shortest path from a source vertex to a sink vertex.
ShortestPathAlgorithm.SingleSourcePaths<V,E>	getPaths(V source) Compute all shortest paths starting from a single source vertex.
double	getPathWeight(V source, V sink) Get the weight of the shortest path from a source vertex to a sink vertex.

Method Detail

getPath

GraphPath<V,E> getPath(V source,
                       V sink)

Get a shortest path from a source vertex to a sink vertex.

Parameters:

source - the source vertex

sink - the target vertex

Returns:

a shortest path or null if no path exists

getPathWeight

double getPathWeight(V source,
                     V sink)

Get the weight of the shortest path from a source vertex to a sink vertex. Returns Double.POSITIVE_INFINITY if no path exists.

Parameters:

source - the source vertex

sink - the sink vertex

Returns:

the weight of the shortest path from a source vertex to a sink vertex, or Double.POSITIVE_INFINITY if no path exists

getPaths

ShortestPathAlgorithm.SingleSourcePaths<V,E> getPaths(V source)

Compute all shortest paths starting from a single source vertex.

Parameters:

source - the source vertex

Returns:

the shortest paths