View Javadoc

1   package org.apache.commons.graph.spanning;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import org.apache.commons.graph.Graph;
23  import org.apache.commons.graph.Vertex;
24  import org.apache.commons.graph.WeightedEdge;
25  import org.apache.commons.graph.WeightedGraph;
26  
27  /**
28   * Prim's algorithm is a greedy algorithm that finds a minimum spanning tree for a connected weighted undirected graph.
29   */
30  public final class Prim
31  {
32  
33      /**
34       * Calculates the minimum spanning tree (or forest) of the input Graph.
35       *
36       * @param <V> the Graph vertices type.
37       * @param <WE> the Graph weighted edges type.
38       * @param graph the Graph for which minimum spanning tree (or forest) has to be calculated.
39       * @return  the minimum spanning tree (or forest) of the input Graph.
40       */
41      public static <V extends Vertex, WE extends WeightedEdge<V>> Graph<V, WE> minimumSpanningTree( WeightedGraph<V, WE> graph )
42      {
43          return null;
44      }
45  
46  }