--- a/gnv-artifacts/src/main/java/de/intevation/gnv/math/XYColumn.java	Tue Dec 22 20:45:45 2009 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/math/XYColumn.java	Wed Dec 23 06:53:46 2009 +0000
@@ -1,32 +1,24 @@
 package de.intevation.gnv.math;
 
-import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
 /**
  * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
+ * @author Sascha L. Teichmann <sascha.teichmann@intevation.de>
  */
 public class XYColumn
-implements   Serializable
+extends      Point2d
 {
+    protected List values;
 
-    private double x;
-    private double y;
-
-    private int    i;
-    private int    j;
-
-    private List   values;
+    public XYColumn() {
+    }
 
     public XYColumn(double x, double y, int i, int j) {
-        this.x = x;
-        this.y = y;
-        this.i = i;
-        this.j = j;
+        super(x, y, i, j);
     }
 
-
     public void add(HeightValue value) {
         if (values == null) {
             values = new ArrayList();
@@ -34,20 +26,8 @@
         values.add(value);
     }
 
-
     public HeightValue[] getValues() {
         return (HeightValue[]) values.toArray(new HeightValue[values.size()]);
     }
-
-
-    public int hashCode() {
-        return (i << 16) | j;
-    }
-
-
-    public boolean equals(Object obj) {
-        XYColumn other = (XYColumn) obj;
-
-        return i == other.i && j == other.j && x == other.x && y == other.y;
-    }
 }
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: