Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/exports/ATWriter.java @ 3318:dbe2f85bf160
merged flys-artifacts/2.8
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:35 +0200 |
| parents | 0c8a6145098b |
| children | 67bbcee26e21 |
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| 2987:98c7a46ec5ae | 3318:dbe2f85bf160 |
|---|---|
| 1 package de.intevation.flys.exports; | |
| 2 | |
| 3 import java.io.IOException; | |
| 4 import java.io.Writer; | |
| 5 import java.io.PrintWriter; | |
| 6 | |
| 7 import java.util.Locale; | |
| 8 | |
| 9 import de.intevation.artifacts.CallMeta; | |
| 10 | |
| 11 import de.intevation.flys.artifacts.model.WQ; | |
| 12 import de.intevation.flys.artifacts.resources.Resources; | |
| 13 | |
| 14 import org.apache.commons.math.analysis.UnivariateRealFunction; | |
| 15 | |
| 16 import org.apache.commons.math.analysis.interpolation.SplineInterpolator; | |
| 17 import org.apache.commons.math.analysis.interpolation.LinearInterpolator; | |
| 18 | |
| 19 import org.apache.commons.math.analysis.polynomials.PolynomialFunction; | |
| 20 | |
| 21 import org.apache.commons.math.FunctionEvaluationException; | |
| 22 | |
| 23 import org.apache.log4j.Logger; | |
| 24 | |
| 25 public class ATWriter | |
| 26 { | |
| 27 private static Logger logger = Logger.getLogger(ATWriter.class); | |
| 28 | |
| 29 public static final int COLUMNS = 10; | |
| 30 | |
| 31 public static final String I18N_AT_HEADER = | |
| 32 "export.discharge.curve.at.header"; | |
| 33 | |
| 34 public static final String EMPTY = " "; | |
| 35 | |
| 36 protected double minW; | |
| 37 protected double maxW; | |
| 38 protected double minQ; | |
| 39 protected double maxQ; | |
| 40 | |
| 41 protected UnivariateRealFunction qFunc; | |
| 42 | |
| 43 public ATWriter() { | |
| 44 } | |
| 45 | |
| 46 public ATWriter(WQ wq) throws IllegalArgumentException { | |
| 47 | |
| 48 int [] bounds = wq.longestIncreasingWRangeIndices(); | |
| 49 | |
| 50 if (logger.isDebugEnabled()) { | |
| 51 logger.debug("exporting w between indices " + | |
| 52 bounds[0] + " and " + bounds[1] + " (" + | |
| 53 wq.getW(bounds[0]) + ", " + wq.getW(bounds[1])); | |
| 54 } | |
| 55 | |
| 56 if (bounds[1]-bounds[0] < 1) { // Only first w can be written out. | |
| 57 minW = maxW = wq.getW(bounds[0]); | |
| 58 minQ = maxQ = wq.getQ(bounds[0]); | |
| 59 // constant function | |
| 60 qFunc = new PolynomialFunction(new double [] { minQ }); | |
| 61 return; | |
| 62 } | |
| 63 | |
| 64 double [] ws = new double[bounds[1]-bounds[0]]; | |
| 65 double [] qs = new double[ws.length]; | |
| 66 | |
| 67 for (int i = 0; i < ws.length; ++i) { | |
| 68 int idx = bounds[0]+i; | |
| 69 ws[i] = wq.getW(idx); | |
| 70 qs[i] = wq.getQ(idx); | |
| 71 } | |
| 72 | |
| 73 qFunc = ws.length < 3 | |
| 74 ? new LinearInterpolator().interpolate(ws, qs) | |
| 75 : new SplineInterpolator().interpolate(ws, qs); | |
| 76 | |
| 77 minW = wq.getW(bounds[0]); | |
| 78 maxW = wq.getW(bounds[1]); | |
| 79 minQ = wq.getQ(bounds[0]); | |
| 80 maxQ = wq.getQ(bounds[1]); | |
| 81 } | |
| 82 | |
| 83 public double getQ(double w) { | |
| 84 | |
| 85 try { | |
| 86 return qFunc.value(w); | |
| 87 } | |
| 88 catch (FunctionEvaluationException aode) { | |
| 89 // should not happen | |
| 90 logger.warn("spline interpolation failed", aode); | |
| 91 return w <= minW ? minQ : maxQ; | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 public static void printQ(PrintWriter out, double q) { | |
| 96 String format; | |
| 97 if (q < 1d) format = " % 8.3f"; | |
| 98 else if (q < 10d) format = " % 8.2f"; | |
| 99 else if (q < 100d) format = " % 8.1f"; | |
| 100 else { | |
| 101 format = " % 8.0f"; | |
| 102 if (q > 1000d) q = Math.rint(q/10d)*10d; | |
| 103 } | |
| 104 out.printf(Locale.US, format, q); | |
| 105 } | |
| 106 | |
| 107 | |
| 108 protected static void printHeader( | |
| 109 PrintWriter out, | |
| 110 CallMeta callMeta, | |
| 111 String river, | |
| 112 double km | |
| 113 ) { | |
| 114 out.println(Resources.getMsg( | |
| 115 callMeta, | |
| 116 I18N_AT_HEADER, | |
| 117 I18N_AT_HEADER, | |
| 118 new Object[] { river, km } )); | |
| 119 } | |
| 120 | |
| 121 | |
| 122 public void write(Writer writer, CallMeta meta, String river, double km) | |
| 123 throws IOException | |
| 124 { | |
| 125 PrintWriter out = new PrintWriter(writer); | |
| 126 | |
| 127 // a header is required, because the desktop version of FLYS will skip | |
| 128 // the first row. | |
| 129 printHeader(out, meta, river, km); | |
| 130 | |
| 131 double rest = (minW * 100.0) % 10.0; | |
| 132 | |
| 133 double startW = Math.rint((minW - rest*0.01)*10.0)*0.1; | |
| 134 | |
| 135 if (logger.isDebugEnabled()) { | |
| 136 logger.debug("startW: " + startW); | |
| 137 logger.debug("rest: " + rest); | |
| 138 } | |
| 139 | |
| 140 int col = 0; | |
| 141 for (double w = startW; w <= maxW; w += 0.01) { | |
| 142 if (col == 0) { | |
| 143 out.printf(Locale.US, "%8d", (int)Math.round(w*100.0)); | |
| 144 } | |
| 145 | |
| 146 if (w < minW) { | |
| 147 out.print(EMPTY); | |
| 148 } | |
| 149 else { | |
| 150 printQ(out, getQ(w)); | |
| 151 } | |
| 152 | |
| 153 if (++col >= COLUMNS) { | |
| 154 out.println(); | |
| 155 col = 0; | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 if (col > 0) { | |
| 160 out.println(); | |
| 161 } | |
| 162 | |
| 163 out.flush(); | |
| 164 } | |
| 165 } | |
| 166 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |