--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/FixingsColumn.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,62 @@
+package org.dive4elements.river.artifacts.model;
+
+import org.dive4elements.river.artifacts.math.Linear;
+
+import java.util.Arrays;
+
+import java.io.Serializable;
+
+public class FixingsColumn
+implements   Serializable
+{
+    protected double [] kms;
+    protected double [] ws;
+
+    protected QRangeTree qs;
+
+    public FixingsColumn() {
+    }
+
+    public FixingsColumn(
+        double []  kms,
+        double []  ws,
+        QRangeTree qs
+    ) {
+        this.kms = kms;
+        this.ws  = ws;
+        this.qs  = qs;
+    }
+
+    public boolean getW(double km, double [] w) {
+        return getW(km, w, 0);
+    }
+
+    public boolean getW(double km, double [] w, int index) {
+
+        if (kms.length == 0 || km < kms[0] || km > kms[kms.length-1]) {
+            w[index] = Double.NaN;
+            return true;
+        }
+
+        int idx = Arrays.binarySearch(kms, km);
+
+        if (idx >= 0) {
+            w[index] = ws[idx];
+            return true;
+        }
+
+        idx = -idx - 1;
+
+        w[index] = Linear.linear(km, kms[idx-1], kms[idx], ws[idx-1], ws[idx]);
+        return false;
+    }
+
+    public double getQ(double km) {
+        return qs.findQ(km);
+    }
+
+    public QRangeTree getQRanges() {
+        return qs;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :