From 65c2b7a661c0daa6d5506198438cac0743682797 Mon Sep 17 00:00:00 2001
From: mayank097 <mayankthakur097@gmail.com>
Date: Mon, 2 Apr 2018 12:46:36 +0530
Subject: [PATCH] Created Ladder Graph Generator

---
 .../generate/LadderGraphGenerator.java        | 102 ++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 jgrapht-core/src/main/java/org/jgrapht/generate/LadderGraphGenerator.java

diff --git a/jgrapht-core/src/main/java/org/jgrapht/generate/LadderGraphGenerator.java b/jgrapht-core/src/main/java/org/jgrapht/generate/LadderGraphGenerator.java
new file mode 100644
index 00000000000..3fae583b91e
--- /dev/null
+++ b/jgrapht-core/src/main/java/org/jgrapht/generate/LadderGraphGenerator.java
@@ -0,0 +1,102 @@
+/* ==========================================
+ * 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 library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+/* -------------------
+ * LadderGraphGenerator.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 a <a href="http://mathworld.wolfram.com/LadderGraph.html">ladder
+ * graph</a> of any size.it is same as grid graph but with number of collumns
+ * fixed to two.
+ *
+ * @author John V. Sichi
+ * @since Sep 16, 2003
+ */
+ public class LadderGraphGenerator<V, E>
+    implements GraphGenerator<V, E, V>
+{
+     //~ Static fields/initializers ---------------------------------------------
+     //~ Instance fields --------------------------------------------------------
+
+    private int rows;
+
+    private int cols=2;
+
+    //~ Constructors -----------------------------------------------------------
+
+    /**
+     * Creates a new ladderGraphGenerator object with rows x cols dimension.
+     *
+     * @param rows the number of rows
+     * @param cols the number of columns
+     */
+     public ladderGraphGenerator(int rows, int cols)
+    {
+        if (rows < 2) {
+            throw new IllegalArgumentException(
+                "illegal number of rows (" + rows
+                + "). there must be at least two.");
+        }
+        if (cols < 2) {
+            throw new IllegalArgumentException(
+                "illegal number of columns (" + cols
+                + "). there must be at least two.");
+        }
+        this.rows = rows;
+        this.cols = cols;
+    }
+
+   //~ Methods ----------------------------------------------------------------
+
+    /**
+     * {@inheritDoc}
+     */
+     @Override public void generateGraph(
+        Graph<V, E> target,
+        VertexFactory<V> vertexFactory,
+        Map<String, V> resultMap)
+    {
+    GridGraphGenerator<V, E> gridGenerator =
+            new gridGraphGenerator<V, E>(row,cols);
+             gridGenerator.generateGraph(target, vertexFactory, resultMap);
+}
+  }