From 21c80bcf9c0541dff03783bc76ef75fe3b4f3d00 Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Thu, 22 Oct 2015 17:56:45 +0200
Subject: Robson's algorithm; added test outputs; more test cases; tester
 bugfix

---
 Practical1/src/nl/camilstaps/cs/graphs/Node.java | 54 ++++++++++++++++++++----
 1 file changed, 45 insertions(+), 9 deletions(-)

(limited to 'Practical1/src/nl/camilstaps/cs/graphs/Node.java')

diff --git a/Practical1/src/nl/camilstaps/cs/graphs/Node.java b/Practical1/src/nl/camilstaps/cs/graphs/Node.java
index 87471e8..4edc666 100644
--- a/Practical1/src/nl/camilstaps/cs/graphs/Node.java
+++ b/Practical1/src/nl/camilstaps/cs/graphs/Node.java
@@ -9,7 +9,7 @@ import java.util.List;
  *
  * @author Camil Staps
  */
-public class Node {
+public class Node implements Comparable<Node> {
     private final int content;
     private final List<Node> neighbours = new ArrayList<>();
 
@@ -17,19 +17,50 @@ public class Node {
         this.content = content;
     }
 
-    /**
-     * Create a copy of another Node
-     * @param copy
-     */
-    public Node(Node copy) {
-        this.content = copy.content;
-        this.neighbours.addAll(copy.neighbours);
+    public int getDegree() {
+        return neighbours.size();
     }
 
-    public List<Node> getNeighbours() {
+    public List<Node> getNeighbourhood() {
         return neighbours;
     }
 
+    public List<Node> getInclusiveNeighbourhood() {
+        List<Node> nb = new ArrayList<>();
+        nb.add(this);
+        nb.addAll(neighbours);
+        return nb;
+    }
+
+    public List<Node> getSecondNeighbourhood() {
+        List<Node> nb = new ArrayList<>();
+        for (Node n : getNeighbourhood())
+            for (Node n2 : n.getNeighbourhood())
+                if (!nb.contains(n2))
+                    nb.add(n2);
+        nb.remove(this);
+        return nb;
+    }
+
+    public boolean dominates(Node b) {
+        for (Node nb : getInclusiveNeighbourhood())
+            if (!b.getInclusiveNeighbourhood().contains(nb))
+                return false;
+        return true;
+    }
+
+    public boolean neighbourhoodsDisjoint(Node b) {
+        return neighbourhoodIntersection(b).isEmpty();
+    }
+
+    public List<Node> neighbourhoodIntersection(Node b) {
+        List<Node> intersection = new ArrayList<>();
+        for (Node n : neighbours)
+            if (b.getNeighbourhood().contains(n))
+                intersection.add(n);
+        return intersection;
+    }
+
     public String toString() {
         return "<" + content + ">";
     }
@@ -43,4 +74,9 @@ public class Node {
         return !(another == null || another.getClass() != this.getClass()) &&
                 content == (((Node) another).content);
     }
+
+    @Override
+    public int compareTo(Node node) {
+        return node == null ? 1 : Integer.compare(neighbours.size(), node.neighbours.size());
+    }
 }
-- 
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