org.jgrapht.graph

Class AsUnweightedGraph<V,E>

java.lang.Object

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

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

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

All Implemented Interfaces:

Serializable, Graph<V,E>

Direct Known Subclasses:

AsUnweightedDirectedGraph

public class AsUnweightedGraph<V,E>
extends GraphDelegator<V,E>
implements Serializable

An unweighted view of the backing weighted graph specified in the constructor. This graph allows modules to apply algorithms designed for unweighted graphs to a weighted graph by simply ignoring edge weights. Query operations on this graph "read through" to the backing graph. Vertex addition/removal and edge addition/removal are all supported (and immediately reflected in the backing graph).

Note that edges returned by this graph's accessors are really just the edges of the underlying directed graph.

This graph does not pass the hashCode and equals operations through to the backing graph, but relies on Object's equals and hashCode methods. This graph will be serializable if the backing graph is serializable.

Since:

Sep 7, 2007

Author:

Lucas J. Scharenbroich

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AsUnweightedGraph(Graph<V,E> g) Constructor for AsUnweightedGraph.

Method Summary

Methods

Modifier and Type	Method and Description
double	getEdgeWeight(E e) Returns the weight assigned to a given edge.

Methods inherited from class org.jgrapht.graph.GraphDelegator

addEdge, addEdge, addVertex, containsEdge, containsVertex, degreeOf, edgeSet, edgesOf, getAllEdges, getEdge, getEdgeFactory, getEdgeSource, getEdgeTarget, incomingEdgesOf, inDegreeOf, outDegreeOf, outgoingEdgesOf, removeEdge, removeEdge, removeVertex, setEdgeWeight, toString, vertexSet

Methods inherited from class org.jgrapht.graph.AbstractGraph

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jgrapht.Graph

containsEdge, removeAllEdges, removeAllEdges, removeAllVertices

Constructor Detail

AsUnweightedGraph

public AsUnweightedGraph(Graph<V,E> g)

Constructor for AsUnweightedGraph.

Parameters:

g - the backing graph over which an unweighted view is to be created.

Method Detail

getEdgeWeight

public double getEdgeWeight(E e)

Description copied from interface: Graph

Returns the weight assigned to a given edge. Unweighted graphs return 1.0 (as defined by WeightedGraph.DEFAULT_EDGE_WEIGHT), allowing weighted-graph algorithms to apply to them where meaningful.

Specified by:

getEdgeWeight in interface Graph<V,E>

Overrides:

getEdgeWeight in class GraphDelegator<V,E>

Parameters:

e - edge of interest

Returns:

edge weight

See Also:

Graph.getEdgeWeight(E)