Package com.google.common.graph

Interface MutableGraph<N>

Type Parameters:

N - Node parameter type

All Superinterfaces:

Graph<N>, PredecessorsFunction<N>, SuccessorsFunction<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	Description
boolean	addNode(N node)	Adds node if it is not already present.
boolean	putEdge(EndpointPair<N> endpoints)	Adds an edge connecting endpoints (in the order, if any, specified by endpoints) if one 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(EndpointPair<N> endpoints)	Removes the edge connecting endpoints, if it is present.
boolean	removeEdge(N nodeU, N nodeV)	Removes the edge connecting nodeU to nodeV, if it is present.
boolean	removeNode(N 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, hasEdgeConnecting, hasEdgeConnecting, hashCode, incidentEdgeOrder, incidentEdges, inDegree, isDirected, nodeOrder, nodes, outDegree, predecessors, successors

Method Detail

addNode

@CanIgnoreReturnValue
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 if the graph was modified as a result of this call

putEdge

@CanIgnoreReturnValue
boolean putEdge(N nodeU,
                N nodeV)

Adds an edge connecting nodeU to nodeV if one is not already present.

If the graph is directed, the resultant edge will be directed; otherwise, it will be undirected.

If nodeU and nodeV are not already present in this graph, this method will silently add nodeU and nodeV to the graph.

Returns:

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

Throws:

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

putEdge

@CanIgnoreReturnValue
boolean putEdge(EndpointPair<N> endpoints)

Adds an edge connecting endpoints (in the order, if any, specified by endpoints) if one is not already present.

If this graph is directed, endpoints must be ordered and the added edge will be directed; if it is undirected, the added edge will be undirected.

If this graph is directed, endpoints must be ordered.

If either or both endpoints are not already present in this graph, this method will silently add each missing endpoint to the graph.

Returns:

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

Throws:

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

IllegalArgumentException - if the endpoints are unordered and the graph is directed

Since:

27.1

removeNode

@CanIgnoreReturnValue
boolean removeNode(N node)

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

Returns:

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

removeEdge

@CanIgnoreReturnValue
boolean removeEdge(N nodeU,
                   N nodeV)

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

Returns:

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

removeEdge

@CanIgnoreReturnValue
boolean removeEdge(EndpointPair<N> endpoints)

Removes the edge connecting endpoints, if it is present.

If this graph is directed, endpoints must be ordered.

Returns:

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

Throws:

IllegalArgumentException - if the endpoints are unordered and the graph is directed

Since:

27.1