--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/FastCrossSectionChunk.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,83 @@
+package org.dive4elements.river.artifacts.model;
+
+import java.util.List;
+import java.util.Collections;
+
+import java.io.Serializable;
+
+import org.dive4elements.river.model.CrossSection;
+
+import org.dive4elements.river.model.FastCrossSectionLine;
+
+import org.apache.log4j.Logger;
+
+public class FastCrossSectionChunk
+implements   Serializable
+{
+    private static Logger log = Logger.getLogger(FastCrossSectionChunk.class);
+
+    public static final String PREFIX = "FCSC:";
+    public static final double KM_RANGE = 1.0;
+
+    protected double startKm;
+    protected int    crossSectionId;
+
+    protected List<FastCrossSectionLine> crossSectionLines;
+
+    public FastCrossSectionChunk() {
+    }
+
+    public FastCrossSectionChunk(CrossSection cs, double km) {
+
+        crossSectionId = cs.getId();
+        startKm = Math.floor(km);
+        double stopKm = startKm + KM_RANGE;
+
+        long startTime = System.currentTimeMillis();
+
+        crossSectionLines = cs.getFastLines(startKm, stopKm);
+
+        long stopTime = System.currentTimeMillis();
+
+        if (log.isDebugEnabled()) {
+            log.debug("Fetching cross section lines took " +
+                (float)(stopTime-startTime)/1000f + " secs.");
+        }
+    }
+
+    public FastCrossSectionLine getCrossSectionLine(double km) {
+        FastCrossSectionLine key = new FastCrossSectionLine(km);
+        int pos = Collections.binarySearch(
+            crossSectionLines, key, FastCrossSectionLine.KM_CMP);
+        return pos < 0 ? null : crossSectionLines.get(pos);
+    }
+
+    public static String createHashKey(CrossSection cs, double km) {
+        return PREFIX + cs.getId() + ":" + (int)Math.floor(km);
+    }
+
+    public String getHashKey() {
+        return PREFIX + crossSectionId + ":" + (int)Math.floor(startKm);
+    }
+
+    public double getStartKm() {
+        return startKm;
+    }
+
+    public void setStartKm(double startKm) {
+        this.startKm = startKm;
+    }
+
+    public double getStopKm() {
+        return startKm + KM_RANGE;
+    }
+
+    public int getCrossSectionId() {
+        return crossSectionId;
+    }
+
+    public void setCrossSectionId(int crossSectionId) {
+        this.crossSectionId = crossSectionId;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :