Module org.jgrapht.opt

Package org.jgrapht.opt.graph.fastutil

Class FastutilGSS<V,E>

java.lang.Object

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

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Implemented Interfaces:

java.io.Serializable, GraphSpecificsStrategy<V,E>

public class FastutilGSS<V,E>
extends java.lang.Object
implements GraphSpecificsStrategy<V,E>

A specifics strategy implementation using fastutil maps for storage.

Graphs constructed using this strategy require the least amount of memory, at the expense of slow edge retrievals. Methods which depend on edge retrievals, e.g. getEdge(V u, V v), containsEdge(V u, V v), addEdge(V u, V v), etc may be relatively slow when the average degree of a vertex is high (dense graphs). For a fast implementation, use FastutilFastLookupGSS.

Author:

Dimitrios Michail

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
FastutilGSS()

Method Summary

Modifier and Type	Method	Description
java.util.function.Function<GraphType,IntrusiveEdgesSpecifics<V,E>>	getIntrusiveEdgesSpecificsFactory()	Get a function which creates the intrusive edges specifics.
java.util.function.BiFunction<Graph<V,E>,GraphType,Specifics<V,E>>	getSpecificsFactory()	Get a function which creates the specifics.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jgrapht.graph.GraphSpecificsStrategy

getEdgeSetFactory

Constructor Details

FastutilGSS

public FastutilGSS()

Method Details

getSpecificsFactory

public java.util.function.BiFunction<Graph<V,E>,GraphType,Specifics<V,E>> getSpecificsFactory()

Description copied from interface: GraphSpecificsStrategy

Get a function which creates the specifics. The factory will accept the graph type as a parameter.

Specified by:

getSpecificsFactory in interface GraphSpecificsStrategy<V,E>

Returns:

a function which creates intrusive edges specifics.

getIntrusiveEdgesSpecificsFactory

public java.util.function.Function<GraphType,IntrusiveEdgesSpecifics<V,E>> getIntrusiveEdgesSpecificsFactory()

Description copied from interface: GraphSpecificsStrategy

Get a function which creates the intrusive edges specifics. The factory will accept the graph type as a parameter.

Note that it is very important to use a map implementation which respects iteration order.

Specified by:

getIntrusiveEdgesSpecificsFactory in interface GraphSpecificsStrategy<V,E>

Returns:

a function which creates intrusive edges specifics.