Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/histogram/HistogramHelper.java @ 1085:ec512e7992c6

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Improved data initialization and axis range calculation in vertical profiles (scalar and vector). gnv-artifacts/trunk@1187 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 09 Jun 2010 17:11:54 +0000
parents 846b2b70b2e0
children f953c9a559d8
rev   line source
617
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1 package de.intevation.gnv.histogram;
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2
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3 import de.intevation.artifacts.CallContext;
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4
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5 import de.intevation.gnv.artifacts.ressource.RessourceFactory;
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6
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7 import de.intevation.gnv.chart.ChartLabels;
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8
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9 import de.intevation.gnv.geobackend.base.Result;
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10 import de.intevation.gnv.geobackend.base.ResultDescriptor;
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11
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12 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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13
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14 import java.util.ArrayList;
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15 import java.util.Collection;
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16 import java.util.Iterator;
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17 import java.util.List;
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18 import java.util.Locale;
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19
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20 import org.apache.log4j.Logger;
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21
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22 /**
770
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23 * This class supports some helper methods for histogram charts.
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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 HistogramHelper {
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28
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29 /**
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30 * Logger used for logging with log4j.
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31 */
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32 private static Logger logger = Logger.getLogger(HistogramHelper.class);
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33
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34
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35 /**
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36 * Disabled HistogramHelper constructor. This is a helper class and no
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37 * instance should be instantiated from this class.
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38 */
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39 private HistogramHelper() {
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40 }
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41
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42
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43 /**
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44 * This function prepare some input data and turns it into an array which is
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45 * taken by {@link de.intevation.gnv.chart.DefaultHistogram}.
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46 *
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47 * @param input A collection with the data used to be displayed in a
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48 * histogram
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49 * @param parameters A collection with a bunch of parameters
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50 * @param measurements A collection with a bunch of measurements
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51 * @param dates A collection with a bunch of dates
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52 *
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53 * @return Object[][] containing raw data which can be used to create
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54 * histograms
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55 */
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56 public static Object[][] prepareHistogramData(
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57 Collection input,
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58 Collection parameters,
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59 Collection measurements,
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60 Collection dates
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61 ) {
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62 List names = new ArrayList<String>();
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63 List data = new ArrayList<Double[]>();
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64
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65 if (logger.isDebugEnabled()) {
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66 logger.debug("############ prepare histogram data ##########");
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67 logger.debug("Input data size: " + input.size());
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68 }
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69
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70 if (input == null) {
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71 return new Object[0][0];
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72 }
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73
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74 String break1, break2, break3;
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75 int b1Idx = -1;
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76 int b2Idx = -1;
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77 int b3Idx = -1;
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78 int yIdx = -1;
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79 try {
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80 Iterator iter = input.iterator();
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81
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82 if (iter.hasNext()) {
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83 Result row = (Result) iter.next();
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84 Result previousRow = row;
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85
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86 if (b1Idx == -1) {
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87 ResultDescriptor rd = row.getResultDescriptor();
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88 b1Idx = rd.getColumnIndex("GROUP1");
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89 b2Idx = rd.getColumnIndex("GROUP2");
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90 b3Idx = rd.getColumnIndex("GROUP3");
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91 yIdx = rd.getColumnIndex("YORDINATE");
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92
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93 if (b1Idx == -1 || b2Idx == -1 || b3Idx == -1 || yIdx == -1) {
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94 return new Object[0][0];
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95 }
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96 }
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97 break1 = row.getString(b1Idx);
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98 break2 = row.getString(b2Idx);
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99 break3 = row.getString(b3Idx);
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100
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101 List values = new ArrayList<Double>();
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102 while (iter.hasNext()) {
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103
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104 // found new series
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105 if (!break1.equals(row.getString(b1Idx))
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106 || !break2.equals(row.getString(b2Idx))
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107 || !break3.equals(row.getString(b3Idx))
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108 ) {
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109
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110 // get parameter name
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111 String name = generateName(
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112 break1, break2, break3,
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113 parameters, measurements, dates
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114 );
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115
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116 // add values and parameter name
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117 data.add((Double[]) values.toArray(new Double[values.size()]));
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118 names.add(name);
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119
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120 if (logger.isDebugEnabled()) {
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121 logger.debug(" --- series name: " + name);
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122 logger.debug(" --- series items: " + values.size());
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123 }
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124
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125 values.clear();
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126
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127 Double yValue = row.getDouble(yIdx);
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128 if (yValue != null)
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129 values.add(yValue);
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130
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131 // set new conditions to find new series
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132 break1 = row.getString(b1Idx);
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133 break2 = row.getString(b2Idx);
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134 break3 = row.getString(b3Idx);
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135
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136 previousRow = row;
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137 row = (Result) iter.next();
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138 } else {
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139
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140 Double value = row.getDouble(yIdx);
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141 if (value != null)
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142 values.add(value);
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143
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144 row = (Result) iter.next();
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145 }
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146 }
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147
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148 Double yValue = row.getDouble(yIdx);
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149 if (yValue != null)
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150 values.add(yValue);
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151
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152 String name = generateName(
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153 break1, break2, break3, parameters, measurements, dates);
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154
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155 if (logger.isDebugEnabled()) {
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156 logger.debug(" --- series name: " + name);
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157 logger.debug(" --- series items: " + values.size());
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158 }
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159
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160 data.add((Double[]) values.toArray(new Double[values.size()]));
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161 names.add(name);
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162 }
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163 }
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164 catch (Exception e) {
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165 logger.error(e.getMessage(), e);
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166 }
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167
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168 int series = data.size();
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169 logger.debug(" === Found total: " + series);
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170 Object[][] obj = new Object[series][2];
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171 for (int i = 0; i < series; i++) {
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172 obj[i][0] = names.get(i);
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173 obj[i][1] = (Double[]) data.get(i);
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174 }
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175
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176 return obj;
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177 }
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178
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179
770
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180 /**
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181 * This method generates a string made up of parameter name and a
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182 * measurement.
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183 *
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184 * @param break1 Id of a parameter.
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185 * @param break2 Id of a measurement.
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186 * @param break3 Id of a date.
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187 * @param parameters A collection with a bunch of parameters.
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188 * @param measurements A collection with a bunch of measurements.
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189 * @param dates A collection with a bunch of dates.
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190 *
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191 * @return Concatenated string (${parametername} + ${measurement} + m).
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192 */
617
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193 protected static String generateName(
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194 String break1, String break2, String break3,
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195 Collection parameters, Collection measurements, Collection dates)
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196 {
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197 return findValueTitle(parameters,break1) + " " +
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198 findValueTitle(measurements,break2) + "m";
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199 }
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200
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201
770
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202 /**
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203 * Find a value with the given <code>id</code> and return its description.
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204 *
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205 * @param values A collection which contains the value we are searching for
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206 * @param id Id of the value
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207 *
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208 * @return String representation of the value. An empty string is returned
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209 * if no value have been found with the given id.
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210 */
617
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211 protected static String findValueTitle(Collection values, String id) {
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212 if (values != null) {
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213 Iterator it = values.iterator();
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214
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215 while (it.hasNext()) {
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216 KeyValueDescibeData data = (KeyValueDescibeData) it.next();
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217
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218 if (id.equals(data.getKey())) {
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219 return data.getValue();
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220 }
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221 }
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222 }
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223 return "";
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224 }
1080
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225
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226
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227 /**
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228 * Creates and returns labels to decorate histograms.
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229 *
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230 * @param uuid The UUID of the current artifact.
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231 * @param context The CallContext object.
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232 * @param data An array storing strings.
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233 * @return A ChartLabels object with the 1st string in <i>data</i> as title.
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234 */
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235 public static ChartLabels createHistogramLabels(
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236 String uuid, CallContext context, Locale locale, Object[] data)
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237 {
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238 RessourceFactory fac = RessourceFactory.getInstance();
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239
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240 return new ChartLabels(
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241 (String) data[0],
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242 "",
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243 "",
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244 fac.getRessource(locale, "histogram.axis.range.title", ""));
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245 }
1081
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246
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247
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248 public static Object[][] prepareVectorialHistogramData(Collection input) {
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249 List names = new ArrayList<String>();
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250 List data = new ArrayList<Double[]>();
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251
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252 if (logger.isDebugEnabled()) {
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253 logger.debug("######### prepare vectorial histogram data #######");
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254 logger.debug("Input data size: " + input.size());
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255 }
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256
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257 if (input == null) {
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258 return new Object[0][0];
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259 }
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260
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261 int sIdx = -1;
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262 int yIdx = -1;
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263
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264 String series = null;
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265
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266 try {
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267 Iterator iter = input.iterator();
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268
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269 if (iter.hasNext()) {
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270 Result row = (Result) iter.next();
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271 Result previousRow = row;
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272
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273 if (sIdx == -1 || yIdx == -1) {
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274 ResultDescriptor rd = row.getResultDescriptor();
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275 sIdx = rd.getColumnIndex("SERIES");
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276 yIdx = rd.getColumnIndex("YORDINATE");
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277
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278 if (sIdx == -1 || yIdx == -1) {
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279 return new Object[0][0];
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280 }
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281 }
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282
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283 List values = new ArrayList<Double>();
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284 while (iter.hasNext()) {
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285 row = (Result) iter.next();
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286
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287 // found new series
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288 if (series != null && !series.equals(row.getString(sIdx))) {
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289
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290 // add values and parameter name
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291 data.add((Double[])
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292 values.toArray(new Double[values.size()]));
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293 names.add(series);
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294
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295 if (logger.isDebugEnabled()) {
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296 logger.debug(" --- series name: " + series);
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297 logger.debug(" --- series items: " + values.size());
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298 }
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299
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300 values.clear();
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301 }
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302
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303 Double value = row.getDouble(yIdx);
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304 if (value != null)
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305 values.add(value);
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306
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307 series = row.getString(sIdx);
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308 }
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309
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310 if (logger.isDebugEnabled()) {
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311 logger.debug(" --- series name: " + series);
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312 logger.debug(" --- series items: " + values.size());
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313 }
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314
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315 data.add((Double[]) values.toArray(new Double[values.size()]));
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316 names.add(series);
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317 }
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318 }
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319 catch (Exception e) {
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320 logger.error(e.getMessage(), e);
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321 }
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322
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323 int count = data.size();
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324 logger.debug(" === Found total: " + count);
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325 Object[][] obj = new Object[count][2];
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326 for (int i = 0; i < count; i++) {
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327 obj[i][0] = names.get(i);
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328 obj[i][1] = (Double[]) data.get(i);
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329 }
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330
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331 return obj;
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332 }
617
3d13fa281a7e Added new ouput mode: histogram.
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333 }
3d13fa281a7e Added new ouput mode: histogram.
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334 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org