Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java @ 2729:a441be7f1589
Added Fix calculation.
flys-artifacts/trunk@4462 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 22 May 2012 17:09:27 +0000 |
parents | |
children | c1f2e792704a |
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package de.intevation.flys.artifacts.model.fixings; import de.intevation.flys.artifacts.FixationArtifactAccess; import de.intevation.flys.artifacts.math.fitting.Function; import de.intevation.flys.artifacts.math.fitting.FunctionFactory; import de.intevation.flys.artifacts.model.Calculation; import de.intevation.flys.artifacts.model.CalculationResult; import de.intevation.flys.artifacts.model.FixingsColumn; import de.intevation.flys.artifacts.model.FixingsColumnFactory; import de.intevation.flys.artifacts.model.FixingsOverview; import de.intevation.flys.artifacts.model.FixingsOverviewFactory; import de.intevation.flys.artifacts.model.Parameters; import de.intevation.flys.artifacts.model.FixingsOverview.Fixing; import de.intevation.flys.artifacts.model.FixingsOverview.IdFilter; import de.intevation.flys.utils.DoubleUtil; import java.util.ArrayList; import java.util.List; import org.apache.commons.math.MathException; import org.apache.commons.math.optimization.fitting.CurveFitter; import org.apache.commons.math.optimization.general.LevenbergMarquardtOptimizer; import org.apache.log4j.Logger; public class FixCalculation extends Calculation { private static Logger logger = Logger.getLogger(FixCalculation.class); protected String river; protected double from; protected double to; protected double step; protected boolean preprocessing; protected String function; protected int [] events; public FixCalculation() { } public FixCalculation(FixationArtifactAccess access) { String river = access.getRiver(); Double from = access.getFrom(); Double to = access.getTo(); Double step = access.getStep(); String function = access.getFunction(); int [] events = access.getEvents(); if (river == null) { // TODO: i18n addProblem("fix.missing.river"); } if (from == null) { // TODO: i18n addProblem("fix.missing.from"); } if (to == null) { // TODO: i18n addProblem("fix.missing.to"); } if (step == null) { // TODO: i18n addProblem("fix.missing.step"); } if (function == null) { // TODO: i18n addProblem("fix.missing.function"); } if (events == null || events.length < 1) { // TODO: i18n addProblem("fix.missing.events"); } if (!hasProblems()) { this.river = river; this.from = from; this.to = to; this.step = step; this.function = function; this.events = events; } } public CalculationResult calculate() { FixingsOverview overview = FixingsOverviewFactory.getOverview(river); if (overview == null) { addProblem("fix.no.overview.available"); } Function func = FunctionFactory.getInstance() .getFunction(function); if (func == null) { // TODO: i18n addProblem("fix.invalid.function.name"); } if (hasProblems()) { return new CalculationResult(this); } FixingsColumnFactory fcf = FixingsColumnFactory.getInstance(); List<FixingsColumn> dataColumns = new ArrayList<FixingsColumn>(events.length); for (int eventId: events) { IdFilter idFilter = new IdFilter(eventId); List<Fixing.Column> columns = overview.filter(null, idFilter); if (columns.isEmpty()) { // TODO: i18n addProblem("fix.missing.column", eventId); continue; } FixingsColumn dataColumn = fcf.getColumnData(columns.get(0)); if (dataColumn == null) { // TODO: i18n addProblem("fix.cannot.load.data", eventId); continue; } dataColumns.add(dataColumn); } if (dataColumns.size() < 2) { // TODO: i18n addProblem("fix.too.less.data.columns"); return new CalculationResult(this); } double [] kms = DoubleUtil.explode(from, to, step); double [] ws = new double[dataColumns.size()]; double [] qs = new double[ws.length]; String [] parameterNames = func.getParameterNames(); Parameters results = new Parameters(createColumnNames(parameterNames)); boolean invalid = false; for (int i = 0; i < kms.length; ++i) { double km = kms[i]; for (int j = 0; j < ws.length; ++j) { FixingsColumn column = dataColumns.get(j); qs[j] = column.getQ(km); boolean interpolated = column.getW(km, ws, j); // TODO: mark as interpolated. } // TODO: Do preprocessing here! double [] parameters = fit(func, km, ws, qs); if (parameters == null) { // Problems are reported already. continue; } int row = results.newRow(); results.set(row, "km", km); for (int j = 0; j < parameters.length; ++j) { if (Double.isNaN(parameters[j])) { invalid = true; } else { results.set(row, parameterNames[j], parameters[j]); } } // TODO: Calculate statistics, too! } if (invalid) { // TODO: i18n addProblem("fix.invalid.values"); results.removeNaNs(); } // TODO: Calculate Delta W/t, too. return new CalculationResult(results, this); } protected static String [] createColumnNames(String [] parameters) { String [] result = new String[parameters.length + 1]; result[0] = "km"; // TODO: Add statistic columns, too. System.arraycopy(parameters, 0, result, 1, parameters.length); return result; } protected double [] fit( Function function, double km, double [] ws, double [] qs ) { LevenbergMarquardtOptimizer lmo = new LevenbergMarquardtOptimizer(); CurveFitter cf = new CurveFitter(lmo); boolean missingWs = false; boolean missingQs = false; for (int i = 0; i < ws.length; ++i) { boolean ignore = false; if (Double.isNaN(ws[i])) { ignore = true; if (!missingWs) { missingWs = true; // TODO: i18n addProblem(km, "fix.missing.w"); } } if (Double.isNaN(qs[i])) { ignore = true; if (!missingQs) { missingQs = true; // TODO: i18n addProblem(km, "fix.missing.q"); } } if (!ignore) { cf.addObservedPoint(ws[i], qs[i]); } } try { return cf.fit(function, function.getInitialGuess()); } catch (MathException me) { addProblem(km, "fix.fitting.failed"); } return null; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :