Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/histogram/HistogramHelper.java @ 1119:7c4f81f74c47
merged gnv-artifacts
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Sep 2012 12:14:00 +0200 |
parents | f953c9a559d8 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2010 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 |
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9 package de.intevation.gnv.histogram; |
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10 |
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11 import de.intevation.artifacts.CallContext; |
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12 |
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13 import de.intevation.gnv.artifacts.ressource.RessourceFactory; |
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14 |
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15 import de.intevation.gnv.chart.ChartLabels; |
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16 |
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17 import de.intevation.gnv.geobackend.base.Result; |
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18 import de.intevation.gnv.geobackend.base.ResultDescriptor; |
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19 |
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20 import de.intevation.gnv.state.describedata.KeyValueDescibeData; |
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21 |
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22 import java.util.ArrayList; |
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23 import java.util.Collection; |
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24 import java.util.Iterator; |
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25 import java.util.List; |
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26 import java.util.Locale; |
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27 |
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28 import org.apache.log4j.Logger; |
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29 |
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30 /** |
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31 * This class supports some helper methods for histogram charts. |
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32 * |
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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34 */ |
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35 public class HistogramHelper { |
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36 |
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37 /** |
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38 * Logger used for logging with log4j. |
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39 */ |
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40 private static Logger logger = Logger.getLogger(HistogramHelper.class); |
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41 |
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42 |
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43 /** |
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44 * Disabled HistogramHelper constructor. This is a helper class and no |
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45 * instance should be instantiated from this class. |
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46 */ |
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47 private HistogramHelper() { |
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48 } |
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49 |
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50 |
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51 /** |
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52 * This function prepare some input data and turns it into an array which is |
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53 * taken by {@link de.intevation.gnv.chart.DefaultHistogram}. |
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54 * |
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55 * @param input A collection with the data used to be displayed in a |
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56 * histogram |
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57 * @param parameters A collection with a bunch of parameters |
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58 * @param measurements A collection with a bunch of measurements |
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59 * @param dates A collection with a bunch of dates |
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60 * |
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61 * @return Object[][] containing raw data which can be used to create |
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62 * histograms |
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63 */ |
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64 public static Object[][] prepareHistogramData( |
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65 Collection input, |
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66 Collection parameters, |
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67 Collection measurements, |
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68 Collection dates |
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69 ) { |
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70 List names = new ArrayList<String>(); |
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71 List data = new ArrayList<Double[]>(); |
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72 |
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73 if (logger.isDebugEnabled()) { |
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74 logger.debug("############ prepare histogram data ##########"); |
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75 logger.debug("Input data size: " + input.size()); |
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76 } |
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77 |
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78 if (input == null) { |
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79 return new Object[0][0]; |
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80 } |
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81 |
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82 String break1, break2, break3; |
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83 int b1Idx = -1; |
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84 int b2Idx = -1; |
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85 int b3Idx = -1; |
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86 int yIdx = -1; |
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87 try { |
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88 Iterator iter = input.iterator(); |
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89 |
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90 if (iter.hasNext()) { |
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91 Result row = (Result) iter.next(); |
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92 Result previousRow = row; |
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93 |
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94 if (b1Idx == -1) { |
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95 ResultDescriptor rd = row.getResultDescriptor(); |
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96 b1Idx = rd.getColumnIndex("GROUP1"); |
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97 b2Idx = rd.getColumnIndex("GROUP2"); |
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98 b3Idx = rd.getColumnIndex("GROUP3"); |
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99 yIdx = rd.getColumnIndex("YORDINATE"); |
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100 |
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101 if (b1Idx == -1 || b2Idx == -1 || b3Idx == -1 || yIdx == -1) { |
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102 return new Object[0][0]; |
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103 } |
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104 } |
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105 break1 = row.getString(b1Idx); |
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106 break2 = row.getString(b2Idx); |
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107 break3 = row.getString(b3Idx); |
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108 |
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109 List values = new ArrayList<Double>(); |
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110 while (iter.hasNext()) { |
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111 |
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112 // found new series |
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113 if (!break1.equals(row.getString(b1Idx)) |
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114 || !break2.equals(row.getString(b2Idx)) |
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115 || !break3.equals(row.getString(b3Idx)) |
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116 ) { |
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117 |
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118 // get parameter name |
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119 String name = generateName( |
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120 break1, break2, break3, |
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121 parameters, measurements, dates |
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122 ); |
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123 |
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124 // add values and parameter name |
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125 data.add((Double[]) values.toArray(new Double[values.size()])); |
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126 names.add(name); |
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127 |
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128 if (logger.isDebugEnabled()) { |
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129 logger.debug(" --- series name: " + name); |
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130 logger.debug(" --- series items: " + values.size()); |
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131 } |
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132 |
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133 values.clear(); |
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134 |
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135 Double yValue = row.getDouble(yIdx); |
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136 if (yValue != null) |
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137 values.add(yValue); |
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138 |
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139 // set new conditions to find new series |
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140 break1 = row.getString(b1Idx); |
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141 break2 = row.getString(b2Idx); |
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142 break3 = row.getString(b3Idx); |
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143 |
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144 previousRow = row; |
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145 row = (Result) iter.next(); |
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146 } else { |
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147 |
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148 Double value = row.getDouble(yIdx); |
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149 if (value != null) |
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150 values.add(value); |
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151 |
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152 row = (Result) iter.next(); |
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153 } |
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154 } |
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155 |
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156 Double yValue = row.getDouble(yIdx); |
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157 if (yValue != null) |
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158 values.add(yValue); |
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159 |
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160 String name = generateName( |
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161 break1, break2, break3, parameters, measurements, dates); |
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162 |
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163 if (logger.isDebugEnabled()) { |
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164 logger.debug(" --- series name: " + name); |
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165 logger.debug(" --- series items: " + values.size()); |
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166 } |
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167 |
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168 data.add((Double[]) values.toArray(new Double[values.size()])); |
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169 names.add(name); |
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170 } |
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171 } |
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172 catch (Exception e) { |
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173 logger.error(e.getMessage(), e); |
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174 } |
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175 |
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176 int series = data.size(); |
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177 logger.debug(" === Found total: " + series); |
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178 Object[][] obj = new Object[series][2]; |
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179 for (int i = 0; i < series; i++) { |
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180 obj[i][0] = names.get(i); |
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181 obj[i][1] = (Double[]) data.get(i); |
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182 } |
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183 |
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184 return obj; |
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185 } |
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186 |
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187 |
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188 /** |
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189 * This method generates a string made up of parameter name and a |
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190 * measurement. |
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191 * |
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192 * @param break1 Id of a parameter. |
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193 * @param break2 Id of a measurement. |
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194 * @param break3 Id of a date. |
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195 * @param parameters A collection with a bunch of parameters. |
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196 * @param measurements A collection with a bunch of measurements. |
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197 * @param dates A collection with a bunch of dates. |
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198 * |
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199 * @return Concatenated string (${parametername} + ${measurement} + m). |
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200 */ |
617
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201 protected static String generateName( |
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202 String break1, String break2, String break3, |
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203 Collection parameters, Collection measurements, Collection dates) |
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204 { |
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205 return findValueTitle(parameters,break1) + " " + |
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206 findValueTitle(measurements,break2) + "m"; |
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207 } |
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208 |
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209 |
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210 /** |
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211 * Find a value with the given <code>id</code> and return its description. |
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212 * |
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213 * @param values A collection which contains the value we are searching for |
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214 * @param id Id of the value |
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215 * |
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216 * @return String representation of the value. An empty string is returned |
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217 * if no value have been found with the given id. |
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218 */ |
617
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219 protected static String findValueTitle(Collection values, String id) { |
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220 if (values != null) { |
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221 Iterator it = values.iterator(); |
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222 |
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223 while (it.hasNext()) { |
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224 KeyValueDescibeData data = (KeyValueDescibeData) it.next(); |
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225 |
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226 if (id.equals(data.getKey())) { |
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227 return data.getValue(); |
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228 } |
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229 } |
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230 } |
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231 return ""; |
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232 } |
1080
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233 |
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234 |
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235 /** |
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236 * Creates and returns labels to decorate histograms. |
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237 * |
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238 * @param uuid The UUID of the current artifact. |
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239 * @param context The CallContext object. |
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240 * @param data An array storing strings. |
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241 * @return A ChartLabels object with the 1st string in <i>data</i> as title. |
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242 */ |
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243 public static ChartLabels createHistogramLabels( |
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244 String uuid, CallContext context, Locale locale, Object[] data) |
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245 { |
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246 RessourceFactory fac = RessourceFactory.getInstance(); |
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247 |
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248 return new ChartLabels( |
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249 (String) data[0], |
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250 "", |
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251 "", |
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252 fac.getRessource(locale, "histogram.axis.range.title", "")); |
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253 } |
1081
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254 |
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255 |
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256 public static Object[][] prepareVectorialHistogramData(Collection input) { |
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257 List names = new ArrayList<String>(); |
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258 List data = new ArrayList<Double[]>(); |
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259 |
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260 if (logger.isDebugEnabled()) { |
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261 logger.debug("######### prepare vectorial histogram data #######"); |
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262 logger.debug("Input data size: " + input.size()); |
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263 } |
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264 |
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265 if (input == null) { |
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266 return new Object[0][0]; |
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267 } |
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268 |
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269 int sIdx = -1; |
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270 int yIdx = -1; |
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271 |
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272 String series = null; |
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273 |
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274 try { |
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275 Iterator iter = input.iterator(); |
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276 |
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277 if (iter.hasNext()) { |
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278 Result row = (Result) iter.next(); |
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279 Result previousRow = row; |
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280 |
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281 if (sIdx == -1 || yIdx == -1) { |
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282 ResultDescriptor rd = row.getResultDescriptor(); |
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283 sIdx = rd.getColumnIndex("SERIES"); |
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284 yIdx = rd.getColumnIndex("YORDINATE"); |
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285 |
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286 if (sIdx == -1 || yIdx == -1) { |
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287 return new Object[0][0]; |
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288 } |
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289 } |
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290 |
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291 List values = new ArrayList<Double>(); |
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292 while (iter.hasNext()) { |
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293 row = (Result) iter.next(); |
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294 |
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295 // found new series |
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296 if (series != null && !series.equals(row.getString(sIdx))) { |
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297 |
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298 // add values and parameter name |
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299 data.add((Double[]) |
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300 values.toArray(new Double[values.size()])); |
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301 names.add(series); |
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302 |
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303 if (logger.isDebugEnabled()) { |
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304 logger.debug(" --- series name: " + series); |
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305 logger.debug(" --- series items: " + values.size()); |
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306 } |
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307 |
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308 values.clear(); |
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309 } |
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310 |
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311 Double value = row.getDouble(yIdx); |
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312 if (value != null) |
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313 values.add(value); |
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314 |
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315 series = row.getString(sIdx); |
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316 } |
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317 |
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318 if (logger.isDebugEnabled()) { |
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319 logger.debug(" --- series name: " + series); |
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320 logger.debug(" --- series items: " + values.size()); |
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321 } |
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322 |
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323 data.add((Double[]) values.toArray(new Double[values.size()])); |
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324 names.add(series); |
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325 } |
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326 } |
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327 catch (Exception e) { |
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328 logger.error(e.getMessage(), e); |
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329 } |
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330 |
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331 int count = data.size(); |
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332 logger.debug(" === Found total: " + count); |
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333 Object[][] obj = new Object[count][2]; |
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334 for (int i = 0; i < count; i++) { |
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335 obj[i][0] = names.get(i); |
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336 obj[i][1] = (Double[]) data.get(i); |
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337 } |
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338 |
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339 return obj; |
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340 } |
617
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341 } |
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342 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |