com.google.common.graph

Class NetworkBuilder<N,E>

java.lang.Object

com.google.common.graph.NetworkBuilder<N,E>

@Beta
public final class NetworkBuilder<N,E>
extends Object

A builder for constructing instances of MutableNetwork with user-defined properties.

A network built by this class will have the following properties by default:

• does not allow parallel edges
• does not allow self-loops
• orders Network.nodes() and Network.edges() in the order in which the elements were added

Example of use:

 MutableNetwork flightNetwork =
     NetworkBuilder.directed().allowsParallelEdges(true).build();
 flightNetwork.addEdge("LAX", "ATL", 3025);
 flightNetwork.addEdge("LAX", "ATL", 1598);
 flightNetwork.addEdge("ATL", "LAX", 2450);
 

Since:

20.0

Author:

James Sexton, Joshua O'Madadhain

Method Summary

Modifier and Type	Method and Description
NetworkBuilder<N,E>	allowsParallelEdges(boolean allowsParallelEdges) Specifies whether the network will allow parallel edges.
NetworkBuilder<N,E>	allowsSelfLoops(boolean allowsSelfLoops) Specifies whether the network will allow self-loops (edges that connect a node to itself).
<N1 extends N,E1 extends E> MutableNetwork<N1,E1>	build() Returns an empty MutableNetwork with the properties of this NetworkBuilder.
static NetworkBuilder<Object,Object>	directed() Returns a NetworkBuilder for building directed networks.
<E1 extends E> NetworkBuilder<N,E1>	edgeOrder(ElementOrder<E1> edgeOrder) Specifies the order of iteration for the elements of Network.edges().
NetworkBuilder<N,E>	expectedEdgeCount(int expectedEdgeCount) Specifies the expected number of edges in the network.
NetworkBuilder<N,E>	expectedNodeCount(int expectedNodeCount) Specifies the expected number of nodes in the network.
static <N,E> NetworkBuilder<N,E>	from(Network<N,E> network) Returns a NetworkBuilder initialized with all properties queryable from network.
<N1 extends N> NetworkBuilder<N1,E>	nodeOrder(ElementOrder<N1> nodeOrder) Specifies the order of iteration for the elements of Network.nodes().
static NetworkBuilder<Object,Object>	undirected() Returns a NetworkBuilder for building undirected networks.

Methods inherited from class java.lang.Object

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

Method Detail

directed

public static NetworkBuilder<Object,Object> directed()

Returns a NetworkBuilder for building directed networks.

undirected

public static NetworkBuilder<Object,Object> undirected()

Returns a NetworkBuilder for building undirected networks.

from

public static <N,E> NetworkBuilder<N,E> from(Network<N,E> network)

Returns a NetworkBuilder initialized with all properties queryable from network.

The "queryable" properties are those that are exposed through the Network interface, such as Network.isDirected(). Other properties, such as expectedNodeCount(int), are not set in the new builder.

allowsParallelEdges

public NetworkBuilder<N,E> allowsParallelEdges(boolean allowsParallelEdges)

Specifies whether the network will allow parallel edges. Attempting to add a parallel edge to a network that does not allow them will throw an UnsupportedOperationException.

allowsSelfLoops

public NetworkBuilder<N,E> allowsSelfLoops(boolean allowsSelfLoops)

Specifies whether the network will allow self-loops (edges that connect a node to itself). Attempting to add a self-loop to a network that does not allow them will throw an UnsupportedOperationException.

expectedNodeCount

public NetworkBuilder<N,E> expectedNodeCount(int expectedNodeCount)

Specifies the expected number of nodes in the network.

Throws:

IllegalArgumentException - if expectedNodeCount is negative

expectedEdgeCount

public NetworkBuilder<N,E> expectedEdgeCount(int expectedEdgeCount)

Specifies the expected number of edges in the network.

Throws:

IllegalArgumentException - if expectedEdgeCount is negative

nodeOrder

public <N1 extends N> NetworkBuilder<N1,E> nodeOrder(ElementOrder<N1> nodeOrder)

Specifies the order of iteration for the elements of Network.nodes().

edgeOrder

public <E1 extends E> NetworkBuilder<N,E1> edgeOrder(ElementOrder<E1> edgeOrder)

Specifies the order of iteration for the elements of Network.edges().

build

public <N1 extends N,E1 extends E> MutableNetwork<N1,E1> build()

Returns an empty MutableNetwork with the properties of this NetworkBuilder.