--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/fixings/FixResult.java	Tue Aug 20 19:50:37 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/fixings/FixResult.java	Wed Aug 21 01:09:25 2013 +0200
@@ -8,15 +8,25 @@
 
 package org.dive4elements.river.artifacts.model.fixings;
 
+import org.apache.log4j.Logger;
 import org.dive4elements.river.artifacts.model.Parameters;
 
 import org.dive4elements.river.utils.KMIndex;
 
+import gnu.trove.TIntIntHashMap;
+
 import java.io.Serializable;
+import java.util.Collection;
+import java.util.Date;
+import java.util.TreeMap;
+import java.util.TreeSet;
 
 public class FixResult
 implements   Serializable
 {
+    private static Logger log =
+        Logger.getLogger(FixResult.class);
+
     protected Parameters      parameters;
     protected KMIndex<QWD []> referenced;
     protected KMIndex<QWI []> outliers;
@@ -42,6 +52,79 @@
         this.referenced = referenced;
     }
 
+    public void makeReferenceEventsDatesUnique() {
+        DateUniqueMaker dum = new DateUniqueMaker();
+        for (KMIndex.Entry<QWD []> entry: referenced) {
+            for (QWD ref: entry.getValue()) {
+                dum.makeUnique(ref);
+            }
+        }
+    }
+
+    public Collection<Integer> getReferenceEventsIndices() {
+        TreeMap<Date, Integer> dates = new TreeMap<Date, Integer>();
+        for (KMIndex.Entry<QWD []> entry: referenced) {
+            for (QWD value: entry.getValue()) {
+                dates.put(value.date, value.index);
+            }
+        }
+        return dates.values();
+    }
+
+    public void remapReferenceIndicesToRank() {
+        Collection<Integer> referenceIndices = getReferenceEventsIndices();
+        int index = 0;
+        TIntIntHashMap map = new TIntIntHashMap();
+        boolean debug = log.isDebugEnabled();
+        for (Integer refId: referenceIndices) {
+            if (debug) {
+                log.debug("map " + refId + " -> " + index);
+            }
+            map.put(refId, index);
+            ++index;
+        }
+
+        // Two passes: If there are shared references do not
+        // remap them twice. In the first pass all indices are
+        // mapped to negative values (assuming the original data
+        // is all positive). If a negative value is found ignore
+        // it because it was remapped before.
+
+        for (KMIndex.Entry<QWD []> entry: referenced) {
+            for (QWD value: entry.getValue()) {
+                if (value.index >= 0) {
+                    if (map.containsKey(value.index)) {
+                        value.index = -(map.get(value.index) + 1);
+                    }
+                    else {
+                        log.warn("Could not remap index: " + value.index);
+                    }
+                }
+            }
+        }
+
+        // In the second pass all indices are turned to positive
+        // values again.
+        for (KMIndex.Entry<QWD []> entry: referenced) {
+            for (QWD value: entry.getValue()) {
+                if (value.index < 0) {
+                    value.index = -(value.index + 1);
+                }
+            }
+        }
+    }
+
+    public Collection<Date> getReferenceEventsDates() {
+        TreeSet<Date> dates = new TreeSet<Date>();
+        for (KMIndex.Entry<QWD []> entry: referenced) {
+            for (QWD qwd: entry.getValue()) {
+                dates.add(qwd.date);
+            }
+        }
+        return dates;
+    }
+
+
     public KMIndex<QWI []> getOutliers() {
         return outliers;
     }