com.google.common.graph

Interface MutableGraph<N>

Type Parameters:

N - Node parameter type

All Superinterfaces:

Graph<N>

@Beta
public interface MutableGraph<N>
extends Graph<N>

A subinterface of Graph which adds mutation methods. When mutation is not required, users should prefer the Graph interface.

Since:

20.0

Author:

James Sexton, Joshua O'Madadhain

Method Summary

Modifier and Type	Method and Description
boolean	addNode(N node) Adds node if it is not already present.
boolean	putEdge(N nodeU, N nodeV) Adds an edge connecting nodeU to nodeV if one is not already present.
boolean	removeEdge(Object nodeU, Object nodeV) Removes the edge connecting nodeU to nodeV, if it is present.
boolean	removeNode(Object node) Removes node if it is present; all edges incident to node will also be removed.

Methods inherited from interface com.google.common.graph.Graph

adjacentNodes, allowsSelfLoops, degree, edges, equals, hashCode, inDegree, isDirected, nodeOrder, nodes, outDegree, predecessors, successors

Method Detail

addNode

boolean addNode(N node)

Adds node if it is not already present.

Nodes must be unique, just as Map keys must be. They must also be non-null.

Returns:

true iff the graph was modified as a result of this call

putEdge

boolean putEdge(N nodeU,
                N nodeV)

Adds an edge connecting nodeU to nodeV if one is not already present. In an undirected graph, the edge will also connect nodeV to nodeU.

Behavior if nodeU and nodeV are not already present in this graph is implementation-dependent. Suggested behaviors include (a) silently adding nodeU and nodeV to the graph (this is the behavior of the default implementations) or (b) throwing IllegalArgumentException.

Returns:

true iff the graph was modified as a result of this call

Throws:

IllegalArgumentException - if the introduction of the edge would violate Graph.allowsSelfLoops()

removeNode

boolean removeNode(Object node)

Removes node if it is present; all edges incident to node will also be removed.

Returns:

true iff the graph was modified as a result of this call

removeEdge

boolean removeEdge(Object nodeU,
                   Object nodeV)

Removes the edge connecting nodeU to nodeV, if it is present.

Returns:

true iff the graph was modified as a result of this call