org.jgrapht.opt.graph.fastutil

Class FastutilMapGraph<V,E>

java.lang.Object

org.jgrapht.graph.AbstractGraph<V,E>

org.jgrapht.graph.AbstractBaseGraph<V,E>

org.jgrapht.opt.graph.fastutil.FastutilMapGraph<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Implemented Interfaces:

Serializable, Cloneable, Graph<V,E>

public class FastutilMapGraph<V,E>
extends AbstractBaseGraph<V,E>

A graph implementation using fastutil's map implementations for storage.

The following example creates a simple undirected weighted graph:

 Graph<String,
     DefaultWeightedEdge> g = new FastutilMapGraph<>(
         SupplierUtil.createStringSupplier(), SupplierUtil.createDefaultWeightedEdgeSupplier(),
         DefaultGraphType.simple().asWeighted());
 

In case you have integer vertices, consider using the FastutilMapIntVertexGraph.

Author:

Dimitrios Michail

See Also:

FastutilMapIntVertexGraph, Serialized Form

Field Summary

Fields inherited from interface org.jgrapht.Graph

DEFAULT_EDGE_WEIGHT

Constructor Summary

Constructors

Constructor and Description
FastutilMapGraph(Supplier<V> vertexSupplier, Supplier<E> edgeSupplier, GraphType type) Construct a new graph.
FastutilMapGraph(Supplier<V> vertexSupplier, Supplier<E> edgeSupplier, GraphType type, boolean fastLookups) Construct a new graph.

Method Summary

Methods inherited from class org.jgrapht.graph.AbstractBaseGraph

addEdge, addEdge, addVertex, addVertex, clone, containsEdge, containsVertex, degreeOf, edgeSet, edgesOf, getAllEdges, getEdge, getEdgeSource, getEdgeSupplier, getEdgeTarget, getEdgeWeight, getType, getVertexSupplier, incomingEdgesOf, inDegreeOf, outDegreeOf, outgoingEdgesOf, removeEdge, removeEdge, removeVertex, setEdgeSupplier, setEdgeWeight, setVertexSupplier, vertexSet

Methods inherited from class org.jgrapht.graph.AbstractGraph

assertVertexExist, containsEdge, equals, hashCode, removeAllEdges, removeAllEdges, removeAllEdges, removeAllVertices, toString, toStringFromSets

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.jgrapht.Graph

containsEdge, removeAllEdges, removeAllEdges, removeAllVertices, setEdgeWeight

Constructor Detail

FastutilMapGraph

public FastutilMapGraph(Supplier<V> vertexSupplier,
                        Supplier<E> edgeSupplier,
                        GraphType type,
                        boolean fastLookups)

Construct a new graph.

Parameters:

vertexSupplier - the vertex supplier, can be null

edgeSupplier - the edge supplier, can be null

type - the graph type

fastLookups - whether to index vertex pairs to allow (expected) constant time edge lookups (by vertex endpoints)

Throws:

IllegalArgumentException - if the graph type is not supported by this implementation

FastutilMapGraph

public FastutilMapGraph(Supplier<V> vertexSupplier,
                        Supplier<E> edgeSupplier,
                        GraphType type)

Construct a new graph.

By default we index vertex pairs to allow (expected) constant time edge lookups.

Parameters:

vertexSupplier - the vertex supplier, can be null

edgeSupplier - the edge supplier, can be null

type - the graph type

Throws:

IllegalArgumentException - if the graph type is not supported by this implementation