Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/histogram/HistogramHelper.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents 846b2b70b2e0
children
rev   line source
1115
f953c9a559d8 Added license file and license headers.
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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
617
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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 /**
770
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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
770
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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
770
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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 */
617
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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
770
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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
770
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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
3d13fa281a7e Added new ouput mode: histogram.
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parents:
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341 }
3d13fa281a7e Added new ouput mode: histogram.
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parents:
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342 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org