98 lines
2.9 KiB
Java
98 lines
2.9 KiB
Java
package org.gcube.dataanalysis.geo.vti.vesselsprocessing;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import org.gcube.contentmanagement.graphtools.utils.MathFunctions;
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import org.gcube.dataanalysis.geo.utils.CSquareCodesConverter;
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public class MonthlyFishingEffortCalculator {
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private static int monthsDifference(Date minDate, Date maxDate) {
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Calendar min = Calendar.getInstance();
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min.setTime(minDate);
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Calendar max = Calendar.getInstance();
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max.setTime(maxDate);
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int monthsDiff = (max.get(Calendar.YEAR) - min.get(Calendar.YEAR))*12 + (max.get(Calendar.MONTH) - min.get(Calendar.MONTH)) + ((max.get(Calendar.DAY_OF_MONTH) - min.get(Calendar.DAY_OF_MONTH)) / 27);
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return monthsDiff;
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}
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// positional Object: x,y,date,hours
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private double minEffort;
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private double maxEffort;
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public Map<String, Double> calculateMonthlyFishingEffort(List<Object> rows, Date minDate, Date maxDate) {
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HashMap<String, Double> csquare2month = new HashMap<String, Double>();
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HashMap<String, double[]> csquaremonths = new HashMap<String, double[]>();
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int numOfPoints = rows.size();
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int numOfMonths = monthsDifference(minDate, maxDate);
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System.out.println("min:"+minDate+" max "+maxDate+" months diffs "+numOfMonths);
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for (int i = 0; i < numOfPoints; i++) {
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Object[] singleRow = (Object[]) rows.get(i);
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double x = Float.parseFloat(""+singleRow[0]);
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double y = Float.parseFloat(""+singleRow[1]);
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Date d = (Date) singleRow[2];
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double hours = (Float) singleRow[3];
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double speed = Double.parseDouble("" + singleRow[4]);
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if ((speed >= 2) && (speed <= 6)) {
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String csquare = CSquareCodesConverter.convertHalfDegree(x, y);
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double[] csquaremontheffort = csquaremonths.get(csquare);
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if (csquaremontheffort == null)
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csquaremontheffort = new double[numOfMonths + 1];
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int index = monthsDifference(minDate, d);
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csquaremontheffort[index] = csquaremontheffort[index] + hours;
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// update the map
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csquaremonths.put(csquare, csquaremontheffort);
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}
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}
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// calculate mean monthly effort
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for (String keySquare : csquaremonths.keySet()) {
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double[] monthsEffort = csquaremonths.get(keySquare);
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double sum = 0;
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for (int i = 0; i < numOfMonths + 1; i++) {
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sum += monthsEffort[i];
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}
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sum = sum / (double) (numOfMonths + 1);
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sum = MathFunctions.roundDecimal(sum, 2);
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if (sum > maxEffort)
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maxEffort = sum;
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if (sum < minEffort)
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minEffort = sum;
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csquare2month.put(keySquare, sum);
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}
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return csquare2month;
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}
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public double getMinEffort() {
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return minEffort;
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}
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public void setMinEffort(double minEffort) {
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this.minEffort = minEffort;
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}
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public double getMaxEffort() {
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return maxEffort;
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}
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public void setMaxEffort(double maxEffort) {
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this.maxEffort = maxEffort;
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}
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}
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