--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java	Sat Jul 21 17:59:13 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java	Sun Jul 22 09:49:56 2012 +0000
@@ -3,6 +3,21 @@
 import de.intevation.flys.artifacts.access.FixAccess;
 
 import de.intevation.flys.artifacts.model.Calculation;
+import de.intevation.flys.artifacts.model.FixingsColumn;
+import de.intevation.flys.artifacts.model.FixingsColumnFactory;
+
+import de.intevation.flys.artifacts.model.FixingsOverview.Fixing.Filter;
+
+import de.intevation.flys.artifacts.model.FixingsOverview.Fixing;
+import de.intevation.flys.artifacts.model.FixingsOverview.IdsFilter;
+
+import de.intevation.flys.artifacts.model.FixingsOverview;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 import org.apache.log4j.Logger;
 
@@ -11,6 +26,76 @@
 {
     private static Logger log = Logger.getLogger(FixCalculation.class);
 
+    /** Helper class to bundle the meta information of a column
+     *  and the real data.
+     */
+    protected static class Column {
+
+        protected Fixing.Column meta;
+        protected FixingsColumn data;
+
+        public Column() {
+        }
+
+        public Column(Fixing.Column meta, FixingsColumn data) {
+            this.meta = meta;
+            this.data = data;
+        }
+
+        public Date getDate() {
+            return meta.getStartTime();
+        }
+
+        public String getDescription() {
+            return meta.getDescription();
+        }
+
+        public boolean getQW(
+            double    km,
+            double [] qs,
+            double [] ws,
+            int       index
+        ) {
+            qs[index] = data.getQ(km);
+            return data.getW(km, ws, index);
+        }
+
+        public boolean getQW(double km, double [] wq) {
+            data.getW(km, wq, 0);
+            if (Double.isNaN(wq[0])) return false;
+            wq[1] = data.getQ(km);
+            return !Double.isNaN(wq[1]);
+        }
+    } // class Column
+
+    /**
+     * Helper class to find the data belonging to meta info more quickly.
+     */
+    protected static class ColumnCache {
+
+        protected Map<Integer, Column> columns;
+
+        public ColumnCache() {
+            columns = new HashMap<Integer, Column>();
+        }
+
+        public Column getColumn(Fixing.Column meta) {
+            Integer key = meta.getId();
+            Column column = columns.get(key);
+            if (column == null) {
+                FixingsColumn data = FixingsColumnFactory
+                    .getInstance()
+                    .getColumnData(meta);
+                if (data != null) {
+                    column = new Column(meta, data);
+                    columns.put(key, column);
+                }
+            }
+            return column;
+        }
+    } // class ColumnCache
+
+
     protected String  river;
     protected double  from;
     protected double  to;
@@ -82,7 +167,46 @@
             this.qSectorEnd    = qSectorEnd;
             this.preprocessing = preprocessing;
         }
+    }
 
+    protected static String toString(
+        String [] parameterNames,
+        double [] values
+    ) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < parameterNames.length; ++i) {
+            if (i > 0) sb.append(", ");
+            sb.append(parameterNames[i]).append(": ").append(values[i]);
+        }
+        return sb.toString();
+    }
+
+    protected Filter createFilter() {
+        return new IdsFilter(events);
+    }
+
+    protected List<Column> getEventColumns(FixingsOverview overview) {
+
+        FixingsColumnFactory fcf = FixingsColumnFactory.getInstance();
+
+        Filter filter = createFilter();
+
+        List<Fixing.Column> metas = overview.filter(null, filter);
+
+        List<Column> columns = new ArrayList<Column>(metas.size());
+
+        for (Fixing.Column meta: metas) {
+
+            FixingsColumn data = fcf.getColumnData(meta);
+            if (data == null) {
+                addProblem("fix.cannot.load.data");
+            }
+            else {
+                columns.add(new Column(meta, data));
+            }
+        }
+
+        return columns;
     }
 }
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