--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/BedOverview.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,200 @@
+package org.dive4elements.river.artifacts.model.minfo;
+
+import java.io.Serializable;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+import org.hibernate.SQLQuery;
+import org.hibernate.Session;
+import org.hibernate.type.StandardBasicTypes;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import org.dive4elements.river.utils.KMIndex;
+
+public class BedOverview
+implements Serializable
+{
+    /**
+     * Serial version UId.
+     */
+    private static final long serialVersionUID = -7967134407371364911L;
+
+    public interface Filter {
+        boolean accept(KMIndex<List<Date>> entry);
+
+    } // interface Filter
+
+
+    public static final Filter ACCEPT = new Filter() {
+        public boolean accept(KMIndex<List<Date>> entry) {
+            return true;
+        }
+    };
+
+    public static class KmFilter implements Filter {
+
+        protected double km;
+
+        public KmFilter (double km) {
+            this.km = km;
+        }
+        public boolean accept(KMIndex<List<Date>> list) {
+            for (KMIndex.Entry<List<Date>> e: list){
+                if (e.getKm() == km) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    };
+
+    public static class DateFilter implements Filter {
+
+        protected Date date;
+
+        public DateFilter (Date date) {
+            this.date = date;
+        }
+
+        public boolean accept(KMIndex<List<Date>> list) {
+            for (KMIndex.Entry<List<Date>> e: list){
+                if (e.getValue().equals(this.date)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    };
+
+    private static Logger log = Logger.getLogger(BedOverview.class);
+
+    public static final double EPSILON = 1e-4;
+
+    public static final String DATE_FORMAT = "dd.MM.yyyy";
+
+    public static final String SQL_SQ =
+        "SELECT" +
+        "    so.km    AS km," +
+        "    so.datum AS datum " +
+        "FROM sohltest so " +
+        "    JOIN station s" +
+        "       ON so.stationid = s.stationid " +
+        "    JOIN gewaesser g " +
+        "       ON s.gewaesserid = g.gewaesserid " +
+        "WHERE" +
+        "    g.name = :name AND" +
+        "    so.km IS NOT NULL " +
+        "ORDER by" +
+        "    so.km, so.datum";
+
+    protected String       riverName;
+
+    protected KMIndex<List<Date>> entries;
+
+    public BedOverview() {
+        entries = new KMIndex<List<Date>>();
+    }
+
+    public BedOverview(String riverName) {
+        this();
+        this.riverName = riverName;
+    }
+
+    private static final boolean epsilonEquals(double a, double b) {
+        return Math.abs(a - b) < EPSILON;
+    }
+
+    protected void loadData(Session session) {
+        SQLQuery query = session.createSQLQuery(SQL_SQ)
+            .addScalar("km",    StandardBasicTypes.DOUBLE)
+            .addScalar("datum", StandardBasicTypes.DATE);
+
+        query.setString("name", riverName);
+
+        List<Object []> list = query.list();
+
+        if (list.isEmpty()) {
+            log.warn("No river '" + riverName + "' found.");
+        }
+
+        Double prevKm = -Double.MAX_VALUE;
+        List<Date> dates = new ArrayList<Date>();
+
+        for (Object [] row: list) {
+            Double km = (Double)row[0];
+            if (!epsilonEquals(km, prevKm) && !dates.isEmpty()) {
+                entries.add(prevKm, dates);
+                dates = new ArrayList<Date>();
+            }
+            dates.add((Date)row[1]);
+            prevKm = km;
+        }
+
+        if (!dates.isEmpty()) {
+            entries.add(prevKm, dates);
+        }
+    }
+
+    public boolean load(Session session) {
+
+        loadData(session);
+
+        return true;
+    }
+
+
+    public void generateOverview(Document document) {
+        generateOverview(document, ACCEPT);
+    }
+
+    public KMIndex<List<Date>> filter(Filter f) {
+        // TODO: Apply filter
+        return entries;
+    }
+
+    public void generateOverview(
+        Document document,
+        Filter   filter
+    ) {
+        KMIndex<List<Date>> filtered = filter(ACCEPT);
+
+        Element sqElement = document.createElement("bed");
+
+        Element riverElement = document.createElement("river");
+
+        riverElement.setAttribute("name", riverName);
+
+        sqElement.appendChild(riverElement);
+
+        SimpleDateFormat df = new SimpleDateFormat(DATE_FORMAT);
+
+        Element kmE = document.createElement("km");
+
+        for (KMIndex.Entry<List<Date>> e: filtered) {
+
+            List<Date> dates = e.getValue();
+
+            if (!dates.isEmpty()) {
+                Element dEs = document.createElement("dates");
+
+                for (Date d: dates) {
+                    Element dE = document.createElement("date");
+
+                    dE.setAttribute("value", df.format(d));
+
+                    dEs.appendChild(dE);
+                }
+
+                kmE.appendChild(dEs);
+            }
+        }
+
+        sqElement.appendChild(kmE);
+
+        document.appendChild(sqElement);
+    }
+}