Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/states/DischargeState.java @ 6185:7573683925a3

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Add sorting for discharge value
author Andre Heinecke <aheinecke@intevation.de>
date Tue, 04 Jun 2013 16:45:23 +0200
parents af13ceeba52a
children a07521dca5b5
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.states;
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10
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11 import java.util.List;
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12 import java.util.Collections;
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13 import java.util.Comparator;
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14
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15 import org.apache.log4j.Logger;
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16
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17 import org.dive4elements.artifacts.Artifact;
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18 import org.dive4elements.artifacts.CallContext;
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19
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20 import org.dive4elements.artifacts.common.model.KVP;
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21
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22 import org.dive4elements.river.model.DischargeZone;
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23 import org.dive4elements.river.model.River;
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24
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25 import org.dive4elements.river.artifacts.D4EArtifact;
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26 import org.dive4elements.river.utils.RiverUtils;
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27
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28
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29 public class DischargeState extends MultiIntArrayState {
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30
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31 public static final String MAIN_CHANNEL = "main_channel";
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32 public static final String TOTAL_CHANNEL = "total_channel";
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33
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34
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35 private static final Logger logger = Logger.getLogger(DischargeState.class);
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36
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37
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38 /** Let client display a matrix. */
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39 @Override
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40 public String getUIProvider() {
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41 return "parameter-matrix";
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42 }
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43
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44
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45 /**
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46 * This method fetches all DischargeZones for a given river (extracted from
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47 * <i>artifact</i>) and returns a KVP[] where the key is the ID of the
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48 * DischargeZone and the value is a string that consists of lower discharge
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49 * and upper discharge.
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50 *
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51 * @param artifact Needs to be a D4EArtifact that provides river
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52 * information.
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53 * @param parameterName The name of a parameter.
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54 *
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55 * @return a KVP[].
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56 */
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57 @Override
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58 protected KVP<Integer, String>[] getOptions(
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59 Artifact artifact,
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60 String parameterName
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61 )
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62 throws IllegalArgumentException
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63 {
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64 if (!testParameterName(parameterName)) {
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65 throw new IllegalArgumentException(
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66 "Invalid parameter for state: '" + parameterName + "'");
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67 }
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68
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69 List<DischargeZone> zones = getDischargeZones(artifact);
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70
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71 KVP[] kvp = new KVP[zones.size()];
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72
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73 Collections.sort(zones, new Comparator<DischargeZone>() {
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74 public int compare(DischargeZone a, DischargeZone b) {
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75 return a.getValue().compareTo(b.getValue());
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76 }
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77 });
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78
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79 int i = 0;
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80
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81 for (DischargeZone zone: zones) {
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82 String lower = zone.getLowerDischarge();
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83 String upper = zone.getUpperDischarge();
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84
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85 if (lower.equals(upper)) {
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86 kvp[i] = new KVP(zone.getId(), lower);
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87 }
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88 else {
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89 kvp[i] = new KVP(zone.getId(), lower + " - " + upper);
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90 }
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91 i++;
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92 }
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93
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94 return kvp;
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95 }
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96
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97
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98 @Override
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99 protected String getLabelFor(
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100 CallContext cc,
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101 String parameterName,
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102 int value
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103 ) throws IllegalArgumentException
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104 {
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105 if (!testParameterName(parameterName)) {
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106 throw new IllegalArgumentException(
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107 "Invalid parameter for state: '" + parameterName + "'");
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108 }
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109
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110 DischargeZone zone = DischargeZone.getDischargeZoneById(value);
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111
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112 if (zone == null) {
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113 throw new IllegalArgumentException(
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114 "Invalid id for DischargeZone: '" + value + "'");
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115 }
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116
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117 String lo = zone.getLowerDischarge();
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118 String hi = zone.getUpperDischarge();
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119
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120 return hi != null && !lo.equals(hi)
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121 ? lo + " - " + hi
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122 : lo;
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123 }
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124
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125
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126 /**
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127 * This method might be used to test, if a parameter name is handled by this
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128 * state.
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129 *
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130 * @param parameterName The name of a parameter.
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131 *
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132 * @return true, if parameterName is one of <i>MAIN_CHANNEL</i> or
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133 * <i>TOTAL_CHANNEL</i>. Otherwise false.
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134 */
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135 protected boolean testParameterName(String parameterName) {
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136 if (parameterName == null || parameterName.length() == 0) {
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137 return false;
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138 }
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139 else if (parameterName.equals(MAIN_CHANNEL)) {
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140 return true;
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141 }
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142 else if (parameterName.equals(TOTAL_CHANNEL)) {
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143 return true;
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144 }
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145 else {
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146 return false;
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147 }
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148 }
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149
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150
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151 /**
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152 * Returns all discharge zones for a given river. The river information is
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153 * extracted from <i>artifact</i> using RiverUtils.getRiver().
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154 *
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155 * @param artifact Needs to be a D4EArtifact that stores a rivername.
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156 *
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157 * @return a list of DischargeZones.
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158 *
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159 * @throws IllegalArgumentException if no river information is provided by
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160 * <i>artifact</i>.
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161 */
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162 protected List<DischargeZone> getDischargeZones(Artifact artifact)
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163 throws IllegalArgumentException
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164 {
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165 River river = RiverUtils.getRiver((D4EArtifact) artifact);
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166
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167 if (river == null) {
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168 throw new IllegalArgumentException("No river found");
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169 }
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170
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171 List<DischargeZone> zones = DischargeZone.getDischargeZones(river);
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172
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173 logger.debug("Found " + zones.size() + " DischargeZones.");
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174
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175 return zones;
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176 }
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177 }
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178 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org