Added the diff_traces method the compare to board wirings

src/main/java/eu/mihosoft/freerouting/board/BasicBoard.java

@@ -35,12 +35,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.security.MessageDigest;
-import java.util.Collection;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.Set;
-import java.util.SortedSet;
-import java.util.TreeSet;
+import java.util.*;
 
 import eu.mihosoft.freerouting.datastructures.ShapeTree.TreeEntry;
 
@@ -90,14 +85,21 @@ public class BasicBoard implements java.io.Serializable
         insert_outline(p_outline_shapes, p_outline_cl_class_no);
     }
 
-    private byte[] serialize()
+    private byte[] serialize(boolean basicProfile)
     {
         try
         {
             var output_stream = new ByteArrayOutputStream();
             var object_stream = new ObjectOutputStream(output_stream);
 
-            object_stream.writeObject(this);
+            if (basicProfile) {
+                object_stream.writeObject(this.get_traces());
+                object_stream.writeObject(this.get_vias());
+                object_stream.writeObject(this.item_list);
+            } else {
+                object_stream.writeObject(this);
+            }
+
             object_stream.close();
 
             return output_stream.toByteArray();
@@ -127,15 +129,15 @@ public class BasicBoard implements java.io.Serializable
 
     public BasicBoard clone()
     {
-        return deserialize(this.serialize());
+        return deserialize(this.serialize(false));
     }
-
+    
     public String get_hash()
     {
         try
         {
             MessageDigest digest = MessageDigest.getInstance("MD5");
-            digest.update(this.serialize());
+            digest.update(this.serialize(true));
             byte[] hashedBytes = digest.digest();
 
             return convert_byte_array_to_hex_string(hashedBytes);
@@ -147,6 +149,27 @@ public class BasicBoard implements java.io.Serializable
         return null;
     }
 
+    public int diff_traces(BasicBoard compare_to)
+    {
+        int result = 0;
+        HashSet<Integer> traceIds = new HashSet<Integer>();
+        for (Trace trace : this.get_traces()) {
+            traceIds.add(trace.get_id_no());
+        }
+
+        for (Trace trace : compare_to.get_traces()) {
+            if (!traceIds.contains(trace.get_id_no()))
+            {
+                result++;
+            } else {
+                traceIds.remove(trace.get_id_no());
+            }
+        }
+        result += traceIds.size();
+
+        return result;
+    }
+
     private static String convert_byte_array_to_hex_string(byte[] arrayBytes) {
         StringBuffer stringBuffer = new StringBuffer();
         for (int i = 0; i < arrayBytes.length; i++) {