org.jgrapht.generate.EmptyGraphGenerator Maven / Gradle / Ivy
/* ==========================================
* JGraphT : a free Java graph-theory library
* ==========================================
*
* Project Info: http://jgrapht.sourceforge.net/
* Project Creator: Barak Naveh (http://sourceforge.net/users/barak_naveh)
*
* (C) Copyright 2003-2008, by Barak Naveh and Contributors.
*
* This program and the accompanying materials are dual-licensed under
* either
*
* (a) the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation, or (at your option) any
* later version.
*
* or (per the licensee's choosing)
*
* (b) the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation.
*/
/* -------------------
* EmptyGraphGenerator.java
* -------------------
* (C) Copyright 2003-2008, by John V. Sichi and Contributors.
*
* Original Author: John V. Sichi
* Contributor(s): -
*
* $Id$
*
* Changes
* -------
* 16-Sep-2003 : Initial revision (JVS);
*
*/
package org.jgrapht.generate;
import java.util.*;
import org.jgrapht.*;
/**
* Generates an empty
* graph of any size. An empty graph is a graph that has no edges.
*
* @author John V. Sichi
* @since Sep 16, 2003
*/
public class EmptyGraphGenerator
implements GraphGenerator
{
private int size;
/**
* Construct a new EmptyGraphGenerator.
*
* @param size number of vertices to be generated
*
* @throws IllegalArgumentException if the specified size is negative.
*/
public EmptyGraphGenerator(int size)
{
if (size < 0) {
throw new IllegalArgumentException("must be non-negative");
}
this.size = size;
}
/**
* {@inheritDoc}
*/
@Override public void generateGraph(
Graph target,
VertexFactory vertexFactory,
Map resultMap)
{
for (int i = 0; i < size; ++i) {
target.addVertex(vertexFactory.createVertex());
}
}
}
// End EmptyGraphGenerator.java