Module org.jgrapht.opt

Package org.jgrapht.opt.graph.fastutil

Class FastutilMapIntVertexGraph<E>

java.lang.Object

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

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

org.jgrapht.opt.graph.fastutil.FastutilMapIntVertexGraph<E>

Type Parameters:

E - the graph edge type

All Implemented Interfaces:

Serializable, Cloneable, Graph<Integer,E>

public class FastutilMapIntVertexGraph<E>
extends AbstractBaseGraph<Integer,E>

A graph implementation using fastutil's map implementations for storage specialized for integer vertices. Edges can be of any object type.

The following example creates a simple undirected weighted graph:

 Graph<Integer,
     DefaultWeightedEdge> g = new FastutilMapIntVertexGraph<>(
         SupplierUtil.createIntegerSupplier(), SupplierUtil.createDefaultWeightedEdgeSupplier(),
         DefaultGraphType.simple().asWeighted());
 

Author:

Dimitrios Michail

See Also:

• FastutilMapGraph
• Serialized Form

Field Summary

Fields inherited from interface org.jgrapht.Graph

DEFAULT_EDGE_WEIGHT

Constructor Summary

Constructors

Constructor	Description
FastutilMapIntVertexGraph(Supplier<Integer> vertexSupplier, Supplier<E> edgeSupplier, GraphType type)	Construct a new graph.
FastutilMapIntVertexGraph(Supplier<Integer> 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, iterables, 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 Details

FastutilMapIntVertexGraph

public FastutilMapIntVertexGraph(Supplier<Integer> 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

FastutilMapIntVertexGraph

public FastutilMapIntVertexGraph(Supplier<Integer> 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