teichmann@5863: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5863:  * Software engineering by Intevation GmbH
teichmann@5863:  *
teichmann@5994:  * This file is Free Software under the GNU AGPL (>=v3)
teichmann@5863:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5994:  * documentation coming with Dive4Elements River for details.
teichmann@5863:  */
teichmann@5863: 
teichmann@5831: package org.dive4elements.river.artifacts.model.minfo;
rrenkert@4521: 
rrenkert@4521: import java.util.ArrayList;
rrenkert@4521: import java.util.Collections;
rrenkert@4521: import java.util.HashMap;
rrenkert@4521: import java.util.List;
rrenkert@4521: import java.util.Map;
rrenkert@4521: import java.util.Set;
rrenkert@4521: 
rrenkert@4521: import org.apache.log4j.Logger;
rrenkert@4521: 
rrenkert@4521: 
rrenkert@4521: public class SedimentDensity
rrenkert@4521: {
rrenkert@4521:     private static final Logger logger = Logger
rrenkert@4521:         .getLogger(SedimentDensity.class);
rrenkert@4521: 
rrenkert@4521:     private Map<Integer, List<SedimentDensityValue>> densities;
rrenkert@4521:     private List<Integer> years;
rrenkert@4521: 
rrenkert@4521:     public SedimentDensity() {
rrenkert@4521:         this.densities = new HashMap<Integer, List<SedimentDensityValue>>();
rrenkert@4521:         this.years = new ArrayList<Integer>();
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     public Map<Integer, List<SedimentDensityValue>> getDensities() {
rrenkert@4521:         return densities;
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     public void setDensities(Map<Integer, List<SedimentDensityValue>> densities) {
rrenkert@4521:         this.densities = densities;
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     public void addDensity(double km, double density, int year) {
rrenkert@4521:         logger.debug("adding " + year);
rrenkert@4521:         if (this.densities.containsKey(year)) {
rrenkert@4521:             List<SedimentDensityValue> list = this.densities.get(year);
rrenkert@4521:             list.add(new SedimentDensityValue(km, density, year));
rrenkert@4521:         }
rrenkert@4521:         else {
rrenkert@4521:             List<SedimentDensityValue> list =
rrenkert@4521:                 new ArrayList<SedimentDensityValue>();
rrenkert@4521:             list.add(new SedimentDensityValue(km, density, year));
rrenkert@4521:             densities.put(year, list);
rrenkert@4521:         }
rrenkert@4521:         if (!this.years.contains(new Integer(year))) {
rrenkert@4521:             logger.debug("new year");
rrenkert@4521:             years.add(new Integer(year));
rrenkert@4521:         }
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     public List<Integer> getYears() {
rrenkert@4521:         return years;
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     public void setYears(List<Integer> years) {
rrenkert@4521:         this.years = years;
rrenkert@4521:     }
rrenkert@4521: 
felix@6937:     /**
felix@6937:      * Get the density at year.
felix@6937:      * measured densities are valid until the next measurement.
felix@6937:      * if no measurement was found 1.8 is returned.
felix@6937:      */
rrenkert@4521:     public double getDensity(double km, int year) {
rrenkert@4521:         Collections.sort(this.years);
felix@6937:         if (this.years.size() == 1 && years.get(0) <= year) {
tom@6910:             logger.debug("get density from year " + year + " at km " + km);
felix@6937:             return getDensityAtKm(densities.get(years.get(0)), km);
rrenkert@4521:         }
felix@6937:         else if (this.years.size() > 1) {
rrenkert@4521:             for (int i = 0; i < years.size() -1; i++) {
rrenkert@4521:                 int y1 = years.get(i);
rrenkert@4521:                 int y2 = years.get(i + 1);
felix@6938:                 if (year >= y1 && year < y2) {
rrenkert@4521:                     return getDensityAtKm(densities.get(y1), km);
rrenkert@4521:                 }
felix@6938:                 else if (year >= y2 && i == years.size() -1) {
rrenkert@4521:                     return getDensityAtKm(densities.get(y2), km);
rrenkert@4521:                 }
rrenkert@4521:             }
rrenkert@4521:         }
rrenkert@5712:         return 1.8d;
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     private double getDensityAtKm(
rrenkert@4521:         List<SedimentDensityValue> values,
rrenkert@4521:         double km
rrenkert@4521:     ) {
felix@6758:         boolean found = false;
rrenkert@4521:         SedimentDensityValue prev = null;
rrenkert@4521:         SedimentDensityValue next = null;
rrenkert@4521:         for (SedimentDensityValue sdv: values) {
tom@6910:             logger.debug("year: " + sdv.getYear());
rrenkert@4521:             if (sdv.getKm() == km) {
rrenkert@4521:                 prev = sdv;
rrenkert@4521:                 found = true;
rrenkert@4521:                 break;
rrenkert@4521:             }
rrenkert@4521:             if (sdv.getKm() > km) {
rrenkert@4521:                 next = sdv;
rrenkert@4521:                 break;
rrenkert@4521:             }
rrenkert@4521:             prev = sdv;
rrenkert@4521:         }
rrenkert@4521:         if (found) {
rrenkert@4521:             return prev.getDensity();
rrenkert@4521:         }
rrenkert@4521:         else {
rrenkert@4521:             return spline(prev, next, km);
rrenkert@4521:         }
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     private double spline(
rrenkert@4521:         SedimentDensityValue prev,
rrenkert@4521:         SedimentDensityValue next,
rrenkert@4521:         double km
rrenkert@4521:     ) {
rrenkert@4521:         double lower = prev.getKm();
rrenkert@4521:         double upper = next.getKm();
rrenkert@4521:         double upperDensity = next.getDensity();
rrenkert@4521:         double lowerDensity = prev.getDensity();
rrenkert@4521: 
rrenkert@4521:         double m =(upperDensity - lowerDensity)/(upper - lower) * km;
rrenkert@4521:         double b = lowerDensity -
rrenkert@4521:             ((upperDensity - lowerDensity)/(upper - lower) * lower);
rrenkert@4521:         return (m * km) + b;
rrenkert@4521:     }
rrenkert@4521: 
rrenkert@4521:     public void cleanUp() {
rrenkert@4521:         Set<Integer> keys = densities.keySet();
rrenkert@4521:         for (Integer key : keys) {
rrenkert@4521:             List<SedimentDensityValue> list = densities.get(key);
rrenkert@4521:             if (list.size() == 0) {
rrenkert@4521:                 return;
rrenkert@4521:             }
rrenkert@4521:             List<SedimentDensityValue> cleaned =
rrenkert@4521:                 new ArrayList<SedimentDensityValue>();
rrenkert@4521:             double prevkm = list.get(0).getKm();
rrenkert@4521:             int counter = 0;
rrenkert@4521:             double sum = 0d;
rrenkert@4521:             for (SedimentDensityValue value : list) {
rrenkert@4521:                 if (value.getKm() == prevkm) {
rrenkert@4521:                     sum += value.getDensity();
rrenkert@4521:                     counter++;
rrenkert@4521:                 }
rrenkert@4521:                 else {
rrenkert@4521:                     cleaned.add(new SedimentDensityValue(
rrenkert@4521:                         prevkm,
rrenkert@4521:                         sum / counter,
rrenkert@4521:                         value.getYear()));
rrenkert@4521:                     sum = value.getDensity();
rrenkert@4521:                     counter = 1;
rrenkert@4521:                 }
rrenkert@4521:                 prevkm = value.getKm();
rrenkert@4521:             }
rrenkert@4521:             this.densities.put(key, cleaned);
rrenkert@4521:         }
rrenkert@4521:     }
rrenkert@4521: }