com.google.common.graph

Class GraphBuilder<N>

java.lang.Object

com.google.common.graph.GraphBuilder<N>

@Beta
public final class GraphBuilder<N>
extends Object

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

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

• does not allow self-loops
• orders Graph.nodes() in the order in which the elements were added

Example of use:

 MutableGraph<String> graph = GraphBuilder.undirected().allowsSelfLoops(true).build();
 graph.putEdge("bread", "bread");
 graph.putEdge("chocolate", "peanut butter");
 graph.putEdge("peanut butter", "jelly");
 

Since:

20.0

Author:

James Sexton, Joshua O'Madadhain

Method Summary

Modifier and Type	Method and Description
GraphBuilder<N>	allowsSelfLoops(boolean allowsSelfLoops) Specifies whether the graph will allow self-loops (edges that connect a node to itself).
<N1 extends N> MutableGraph<N1>	build() Returns an empty MutableGraph with the properties of this GraphBuilder.
static GraphBuilder<Object>	directed() Returns a GraphBuilder for building directed graphs.
GraphBuilder<N>	expectedNodeCount(int expectedNodeCount) Specifies the expected number of nodes in the graph.
static <N> GraphBuilder<N>	from(Graph<N> graph) Returns a GraphBuilder initialized with all properties queryable from graph.
<N1 extends N> GraphBuilder<N1>	nodeOrder(ElementOrder<N1> nodeOrder) Specifies the order of iteration for the elements of Graph.nodes().
static GraphBuilder<Object>	undirected() Returns a GraphBuilder for building undirected graphs.

Methods inherited from class java.lang.Object

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

Method Detail

directed

public static GraphBuilder<Object> directed()

Returns a GraphBuilder for building directed graphs.

undirected

public static GraphBuilder<Object> undirected()

Returns a GraphBuilder for building undirected graphs.

from

public static <N> GraphBuilder<N> from(Graph<N> graph)

Returns a GraphBuilder initialized with all properties queryable from graph.

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

allowsSelfLoops

public GraphBuilder<N> allowsSelfLoops(boolean allowsSelfLoops)

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

expectedNodeCount

public GraphBuilder<N> expectedNodeCount(int expectedNodeCount)

Specifies the expected number of nodes in the graph.

Throws:

IllegalArgumentException - if expectedNodeCount is negative

nodeOrder

public <N1 extends N> GraphBuilder<N1> nodeOrder(ElementOrder<N1> nodeOrder)

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

build

public <N1 extends N> MutableGraph<N1> build()

Returns an empty MutableGraph with the properties of this GraphBuilder.