Package org.jgrapht

# Interface GraphType

All Known Implementing Classes:
DefaultGraphType

public interface GraphType
A graph type.

The graph type describes various properties of a graph such as whether it is directed, undirected or mixed, whether it contain self-loops (a self-loop is an edge where the source vertex is the same as the target vertex), whether it contain multiple (parallel) edges (multiple edges which connect the same pair of vertices) and whether it is weighted or not.

The type of a graph can be queried on runtime using method Graph.getType(). This way, for example, an algorithm can have different behavior based on whether the input graph is directed or undirected, etc.

Author:
Dimitrios Michail
• ## Method Summary

Modifier and Type Method Description
GraphType asDirected()
Create a directed variant of the current graph type.
GraphType asMixed()
Create a mixed variant of the current graph type.
GraphType asModifiable()
Create a modifiable variant of the current graph type.
GraphType asUndirected()
Create an undirected variant of the current graph type.
GraphType asUnmodifiable()
Create an unmodifiable variant of the current graph type.
GraphType asUnweighted()
Create an unweighted variant of the current graph type.
GraphType asWeighted()
Create a weighted variant of the current graph type.
boolean isAllowingCycles()
Returns true if and only if cycles are allowed in this graph.
boolean isAllowingMultipleEdges()
Returns true if and only if multiple (parallel) edges are allowed in this graph.
boolean isAllowingSelfLoops()
Returns true if and only if self-loops are allowed in this graph.
boolean isDirected()
Returns true if all edges of the graph are directed, false otherwise.
boolean isMixed()
Returns true if the graph contain both directed and undirected edges, false otherwise.
boolean isModifiable()
Returns true if the graph is modifiable, false otherwise.
boolean isMultigraph()
Returns true if the graph is a multigraph, false otherwise.
boolean isPseudograph()
Returns true if the graph is a pseudograph, false otherwise.
boolean isSimple()
Returns true if the graph is simple, false otherwise.
boolean isUndirected()
Returns true if all edges of the graph are undirected, false otherwise.
boolean isWeighted()
Returns true if and only if the graph supports edge weights.
• ## Method Details

• ### isDirected

boolean isDirected()
Returns true if all edges of the graph are directed, false otherwise.
Returns:
true if all edges of the graph are directed, false otherwise
• ### isUndirected

boolean isUndirected()
Returns true if all edges of the graph are undirected, false otherwise.
Returns:
true if all edges of the graph are undirected, false otherwise
• ### isMixed

boolean isMixed()
Returns true if the graph contain both directed and undirected edges, false otherwise.
Returns:
true if the graph contain both directed and undirected edges, false otherwise
• ### isAllowingMultipleEdges

boolean isAllowingMultipleEdges()
Returns true if and only if multiple (parallel) edges are allowed in this graph. The meaning of multiple edges is that there can be many edges going from vertex v1 to vertex v2.
Returns:
true if and only if multiple (parallel) edges are allowed.
• ### isAllowingSelfLoops

boolean isAllowingSelfLoops()
Returns true if and only if self-loops are allowed in this graph. A self loop is an edge that its source and target vertices are the same.
Returns:
true if and only if graph self-loops are allowed.
• ### isAllowingCycles

boolean isAllowingCycles()
Returns true if and only if cycles are allowed in this graph.
Returns:
true if and only if graph cycles are allowed.
• ### isWeighted

boolean isWeighted()
Returns true if and only if the graph supports edge weights.
Returns:
true if the graph supports edge weights, false otherwise.
• ### isSimple

boolean isSimple()
Returns true if the graph is simple, false otherwise.
Returns:
true if the graph is simple, false otherwise
• ### isPseudograph

boolean isPseudograph()
Returns true if the graph is a pseudograph, false otherwise.
Returns:
true if the graph is a pseudograph, false otherwise
• ### isMultigraph

boolean isMultigraph()
Returns true if the graph is a multigraph, false otherwise.
Returns:
true if the graph is a multigraph, false otherwise
• ### isModifiable

boolean isModifiable()
Returns true if the graph is modifiable, false otherwise.
Returns:
true if the graph is modifiable, false otherwise
• ### asDirected

GraphType asDirected()
Create a directed variant of the current graph type.
Returns:
a directed variant of the current graph type
• ### asUndirected

GraphType asUndirected()
Create an undirected variant of the current graph type.
Returns:
an undirected variant of the current graph type
• ### asMixed

GraphType asMixed()
Create a mixed variant of the current graph type.
Returns:
a mixed variant of the current graph type
• ### asUnweighted

GraphType asUnweighted()
Create an unweighted variant of the current graph type.
Returns:
an unweighted variant of the current graph type
• ### asWeighted

GraphType asWeighted()
Create a weighted variant of the current graph type.
Returns:
a weighted variant of the current graph type
• ### asModifiable

GraphType asModifiable()
Create a modifiable variant of the current graph type.
Returns:
a modifiable variant of the current graph type
• ### asUnmodifiable

GraphType asUnmodifiable()
Create an unmodifiable variant of the current graph type.
Returns:
a unmodifiable variant of the current graph type