Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/chart/HorizontalProfileChart.java @ 773:5fb1ea68e19c

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Avoid danger to get a NullPointerException if no time to live is served by CallContext. gnv-artifacts/trunk@832 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 26 Mar 2010 09:55:28 +0000
parents 79401c871da4
children 9a828e5a2390
rev   line source
298
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1 package de.intevation.gnv.chart;
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2
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3 import java.util.Collection;
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4 import java.util.Locale;
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5 import java.util.Map;
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6
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7 import com.vividsolutions.jts.geom.Point;
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8 import com.vividsolutions.jts.io.WKTReader;
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9 import com.vividsolutions.jts.io.ParseException;
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11 import org.apache.log4j.Logger;
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13 import org.jfree.chart.ChartTheme;
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14 import org.jfree.chart.plot.PlotOrientation;
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15 import org.jfree.data.general.Series;
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16 import org.jfree.data.xy.XYSeries;
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18 import de.intevation.gnv.geobackend.base.Result;
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19 import de.intevation.gnv.utils.DistanceCalculator;
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20
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21
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22 /**
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23 * This class is used to create xy-charts of horizontal profiles.
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24 *
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25 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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26 */
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27 public class HorizontalProfileChart
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28 extends VerticalProfileChart
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29 {
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30 /**
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31 * Logger used for logging with log4j.
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32 */
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33 private static Logger log = Logger.getLogger(HorizontalProfileChart.class);
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34
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35 /**
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36 * <code>WKTReader</code> used to turn wkt strings into geometries.
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37 */
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38 private static WKTReader wktReader = new WKTReader();
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40 /**
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41 * The first point in a HorizontalProfileChart. It is used to calculate the
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42 * distance between the currently processed point an the start.
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43 */
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44 private Point firstPoint;
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45
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46 /**
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47 * Constructor used to create horizontal profile charts.
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48 *
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49 * @param labels Labels used to be displayed in title, subtitle and so on.
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50 * @param theme ChartTheme used to adjust the rendering of this chart.
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51 * @param parameters Collection containing a bunch of parameters.
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52 * @param measurements Collection containing a bunch of measurements.
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53 * @param dates Collection containing a bunch of date objects.
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54 * @param result Collection containing a bunch of <code>Result</code>
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55 * objects which contain the actual data items to be displayed.
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56 * @param timeGaps Collection with timegap definitions.
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57 * @param locale Locale used to specify the format of labels, numbers, ...
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58 * @param linesVisible Render lines between data points if true, otherwise
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59 * not.
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60 * @param shapesVisible Render vertices as points if true, otherwise not.
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61 */
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62 public HorizontalProfileChart(
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63 ChartLabels labels,
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64 ChartTheme theme,
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65 Collection parameters,
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66 Collection measurements,
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67 Collection dates,
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68 Collection result,
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69 Collection timeGaps,
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70 Locale locale,
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71 boolean linesVisible,
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72 boolean shapesVisible
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73 ) {
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74 super(
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75 labels,
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76 theme,
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77 parameters,
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78 measurements,
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79 dates,
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80 result,
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81 timeGaps,
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82 locale,
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83 linesVisible,
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84 shapesVisible
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85 );
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86 this.PLOT_ORIENTATION = PlotOrientation.VERTICAL;
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87 }
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88
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89
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90 /**
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91 * @see de.intevation.gnv.chart.VerticalProfileChart#getValue(Result)
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92 */
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93 @Override
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94 protected Object getValue(Result row) {
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95 try {
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96 return (Point) wktReader.read(row.getString("SHAPE"));
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97 }
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98 catch(ParseException pe) {
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99 log.warn("No data found while parsing.");
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100 return null;
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101 }
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102 }
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103
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104
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105 /**
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106 * @see de.intevation.gnv.chart.VerticalProfileChart#gapDetection(Result,
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107 * Series, int, int)
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108 */
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109 @Override
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110 protected void gapDetection(
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111 Result[] results,
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112 Series series,
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113 int startPos,
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114 int endPos
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115 ) {
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116 log.debug("Start gap detection.");
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117 try {
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118 Point startValue = getPoint(results[startPos]);
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119 Point endValue = getPoint(results[endPos-1]);
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120 if (results[0].getInteger("DATAID") == 2)
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121 addGapsOnGrid(results, series, startPos, endPos);
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122 else
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123 addGaps(
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124 results,
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125 series,
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126 startValue,
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127 endValue,
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128 startPos,
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129 endPos
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130 );
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131 }
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132 catch (ParseException pe) {
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133 log.warn(
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134 "Error while parsing points for gap detection. " +
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135 "No gaps for current series will be detected."
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136 );
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137 }
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138
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139 log.debug("Gap detection finished.");
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140 }
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141
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142
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143 /**
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144 * @see de.intevation.gnv.chart.AbstractXYLineChart(Result, Series)
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145 */
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146 @Override
298
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147 protected void addValue(Result row, Series series) {
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148 double distance = 0;
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149
298
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150 try {
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151 Point point = (Point) wktReader.read(row.getString("SHAPE"));
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152 if (firstPoint != null) {
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153 distance = DistanceCalculator.calculateDistance(
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154 firstPoint, point
298
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155 );
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156 }
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157 else {
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158 firstPoint = point;
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159 }
298
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160
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161 ((XYSeries) series).add(
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162 distance,
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163 row.getDouble("YORDINATE")
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164 );
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165 }
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166 catch(ParseException pe) {
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167 log.warn("No data found while parsing.");
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168 }
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169 }
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170
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171
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172
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173 /**
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174 * @see de.intevation.gnv.chart.AbstractXYLineChart#addSeries(Series,
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175 * String, int)
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176 */
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177 @Override
334
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178 protected void addSeries(Series series, String label, int idx) {
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179 super.addSeries(series, label, idx);
298
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180
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181 // reset firstPoint for next series
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182 firstPoint = null;
298
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183 }
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184
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185
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186 /**
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187 * @see de.intevation.gnv.chart.VerticalProfileChart#prepareRangeAxis(String,
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188 * int)
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189 */
656
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190 @Override
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191 protected void prepareRangeAxis(String seriesKey, int idx) {
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192 return;
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193 // do nothing here
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194 }
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195
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196
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197 /**
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198 * @see de.intevation.gnv.chart.VerticalProfileChart#storeMaxValue(Map,
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199 * Object, String)
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200 */
656
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201 @Override
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202 protected void storeMaxValue(Map values, Object value, String parameter) {
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203 return;
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204 // do nothing here
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205 }
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206
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207
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208 /**
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209 * @see de.intevation.gnv.chart.AbstractXYLineChart#createSeriesName(String,
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210 * String, String)
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211 */
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212 @Override
298
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213 protected String createSeriesName(
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214 String breakPoint1,
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215 String breakPoint2,
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216 String breakPoint3
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217 ) {
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218 log.debug("create seriesname of horizontalprofile chart");
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219 return super.createSeriesName(
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220 breakPoint1,
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221 breakPoint2,
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222 breakPoint3) +
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223 " " +
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224 findValueTitle(dates, breakPoint3);
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225 }
340
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226
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227
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228 /**
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229 * @see de.intevation.gnv.chart.VerticalProfileChart#addGapsOnGrid(Result[],
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230 * Series, int, int)
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231 */
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232 @Override
340
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233 protected void addGapsOnGrid(
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234 Result[] results,
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235 Series series,
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236 int startPos,
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237 int endPos
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238 ) {
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239 String axis = getDependendAxisName(
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240 results[startPos],
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241 results[startPos+1]
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242 );
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243
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244 int last = 0;
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245 int current = 0;
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246 Point lastPoint = null;
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247 Point currentPoint = null;
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248
644
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249 try {
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250 firstPoint = getPoint(results[0]);
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251 }
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252 catch (ParseException pe) {
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253 log.error("Unable to parse start point for gap detection.");
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254 return;
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255 }
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256
340
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257 for (int i = startPos+1; i < endPos; i++) {
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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258 try {
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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259 last = results[i-1].getInteger(axis);
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260 lastPoint = getPoint(results[i-1]);
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261 current = results[i].getInteger(axis);
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262 currentPoint = getPoint(results[i]);
644
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263 double distance = DistanceCalculator.calculateDistance(
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264 firstPoint,
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265 currentPoint);
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266 double distanceOld = DistanceCalculator.calculateDistance(
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267 firstPoint,
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268 lastPoint);
340
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269
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270 boolean detected = gridDetection(last, current);
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271
643
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272 if (log.isDebugEnabled()) {
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273 log.debug("Last point: " + lastPoint.toString());
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274 log.debug("Current point: " + currentPoint.toString());
644
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275 log.debug("Current distance from start: " + distance);
643
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276 }
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277
340
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278 if (detected) {
643
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279 log.info(
644
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280 "Gap detected on grid between " + distanceOld +
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281 " and " + distance);
340
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282
644
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283 ((XYSeries) series).add(distance-1d, null);
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284 ((XYSeries) series).add(distanceOld+1d, null);
340
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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285 }
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286 }
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287 catch (ParseException pe) {
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288 log.warn("Error while parsing point for gap detection.", pe);
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289 }
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290 }
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291 }
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292
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293
767
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294 /**
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295 * Method to add gaps between two data points. The real detection is done by
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296 * {@link #simpleDetection} and {@link #specialDetection}.
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297 *
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298 * @param results All data points in this dataset.
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299 * @param series Series to be processed.
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300 * @param startValue <code>Point</code> where the scan for gaps should begin.
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301 * @param endValue <code>Point</code> where the scan should end.
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302 * @param startPos Start position of this series in <code>results</code>.
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303 * @param endPos End position of a series in <code>results</code>
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304 */
340
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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305 protected void addGaps(
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306 Result[] results,
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diff changeset
307 Series series,
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308 Point startValue,
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
309 Point endValue,
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310 int startPos,
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
311 int endPos
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
312 ) {
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313 double range = 0;
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
314 Point last = null;
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
315 Point now = null;
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
316
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
317 for (int i = startPos+1; i < endPos; i++) {
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
318 boolean detected = false;
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diff changeset
319
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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parents: 334
diff changeset
320 try {
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
321 last = (Point) getPoint(results[i-1]);
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diff changeset
322 now = (Point) getPoint(results[i]);
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diff changeset
323
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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324 // gap detection for more than GAP_MAX_VALUES values
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diff changeset
325 if (results.length > GAP_MAX_VALUES)
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diff changeset
326 detected = simpleDetection(startValue, endValue, last, now);
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diff changeset
327 // gap detection for less than GAP_MAX_VALUES values
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
328 else
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
329 detected = specialDetection(
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diff changeset
330 startValue,
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
331 endValue,
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
332 last,
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
333 now,
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
334 results.length
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 334
diff changeset
335 );
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 334
diff changeset
336
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
337 // gap detected, insert null value to break line
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
338 if (detected) {
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diff changeset
339 log.info("Gap after " + range);
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parents: 334
diff changeset
340 double x = range + 0.0001;
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
341
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
342 ((XYSeries)series).add(x, null);
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
343 }
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
344
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
345 range += DistanceCalculator.calculateDistance(last,now);
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diff changeset
346 }
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
347 catch (ParseException pe) {
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diff changeset
348 log.warn("Error while parsing point.");
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diff changeset
349 }
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diff changeset
350
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
351 }
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parents: 334
diff changeset
352 }
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
353
07a64cfafdf1 Added gap detection in horizontal and vertical profile charts. Distinguish between meshes and other data sources.
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diff changeset
354
767
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355 /**
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356 * Simple method to detect gaps. A gap is detected if the delta between two
79401c871da4 Added and repaired javadoc in de.intevation.gnv.chart package.
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357 * data points (current, last) is bigger than <code>PERCENTAGE</code> percent
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358 * of delta of start and end.
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359 * <br>
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360 * (smallDelta &gt; delta / 100 * PERCENTAGE)
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361 *
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362 * @param start First data point in a series
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363 * @param end Last data point in a series
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364 * @param last Left point
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365 * @param current Right point
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366 *
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367 * @return true, if a gap is detected between last and current - otherwise
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368 * false.
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369 */
340
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370 protected boolean simpleDetection(
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371 Point start,
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372 Point end,
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373 Point last,
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374 Point current
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375 ) {
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376 double delta = DistanceCalculator.calculateDistance(start, end);
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377 double deltaSmall = DistanceCalculator.calculateDistance(last,current);
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378
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379 return (deltaSmall > (delta / 100 * PERCENTAGE));
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380 }
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381
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382
767
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383 /**
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384 * Method to detect gaps between two data points. Following formula is used
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385 * for detection:<br>
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386 * smallDelta &gt; (3.0 / (count - 1) * delta)<br>
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387 * smallDelta = distance between <code>current</code> and <code>last</code>
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388 * <br>
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389 * delta = distance between <code>start</code> and <code>end</code>
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390 *
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391 * @param start First data point in a series
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392 * @param end Last data point in a series
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393 * @param last Left point
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394 * @param current Right point
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395 *
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396 * @return true, if a gap is detected between last and current - otherwise
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397 * false.
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398 */
340
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399 protected boolean specialDetection(
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400 Point start,
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401 Point end,
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402 Point last,
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403 Point current,
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404 int count
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405 ) {
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406 double delta = Math.abs(
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407 DistanceCalculator.calculateDistance(end, start)
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408 );
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409 double smallDelta = Math.abs(
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410 DistanceCalculator.calculateDistance(current, last)
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411 );
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412
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413 return (smallDelta > (3.0 / (count - 1) * delta));
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414 }
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415
767
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416 /**
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417 * @see de.intevation.gnv.chart.VerticalProfileChart#getDependendAxisName(Result,
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418 * Result)
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419 */
370
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420 @Override
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421 protected String getDependendAxisName(Result first, Result second) {
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422 if (first.getInteger("IPOSITION") == second.getInteger("IPOSITION"))
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423 return "JPOSITION";
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424
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425 return "IPOSITION";
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426 }
340
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427
767
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428 /**
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429 * This method returns a point from a given wkt string stored in
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430 * <code>result</code>.
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431 *
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432 * @param result <code>Result</code> object which contains the wkt string.
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433 * The wkt string needs to be available under the key SHAPE.
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434 *
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435 * @return Point representation of wkt string.
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436 */
340
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437 private Point getPoint(Result result)
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438 throws ParseException
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439 {
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440 return (Point) wktReader.read(result.getString("SHAPE"));
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441 }
298
80f7c5dc09c6 Implementation of classes for creating timeseries, verticalprofile and horizontalprofile charts.
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442 }
327
22a6493e8460 New options in chart template: visibility of lines and points in charts and point's size.
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443 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org