Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DischargeState.java @ 3904:2d2ca7bf70a7

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Prevent ArrayIndexOutOfBounds-Exception. flys-artifacts/trunk@5569 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Sat, 22 Sep 2012 09:57:27 +0000
parents e54f8dc222cf
children 208a891c21b5
rev   line source
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1 package de.intevation.flys.artifacts.states;
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2
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3 import java.util.List;
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4
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5 import org.apache.log4j.Logger;
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6
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7 import de.intevation.artifacts.Artifact;
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8 import de.intevation.artifacts.CallContext;
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9
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10 import de.intevation.artifacts.common.model.KVP;
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11
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12 import de.intevation.flys.model.DischargeZone;
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13 import de.intevation.flys.model.River;
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14
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15 import de.intevation.flys.artifacts.FLYSArtifact;
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16 import de.intevation.flys.utils.FLYSUtils;
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17
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18
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19 public class DischargeState extends MultiIntArrayState {
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20
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21 public static final String MAIN_CHANNEL = "main_channel";
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22 public static final String TOTAL_CHANNEL = "total_channel";
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23
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24
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25 private static final Logger logger = Logger.getLogger(DischargeState.class);
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26
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27
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28 @Override
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29 public String getUIProvider() {
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30 return "parameter-matrix";
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31 }
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32
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33
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34 /**
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35 * This method fetches all DischargeZones for a given river (extracted from
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36 * <i>artifact</i>) and returns a KVP[] where the key is the ID of the
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37 * DischargeZone and the value is a string that consists of lower discharge
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38 * and upper discharge.
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39 *
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40 * @param artifact Needs to be a FLYSArtifact that provides river
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41 * information.
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42 * @param parameterName The name of a parameter.
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43 *
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44 * @return a KVP[].
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45 */
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46 @Override
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47 protected KVP<Integer, String>[] getOptions(
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48 Artifact artifact,
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49 String parameterName
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50 )
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51 throws IllegalArgumentException
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52 {
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53 if (!testParameterName(parameterName)) {
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54 throw new IllegalArgumentException(
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55 "Invalid parameter for state: '" + parameterName + "'");
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56 }
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57
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58 List<DischargeZone> zones = getDischargeZones(artifact);
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59
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60 KVP[] kvp = new KVP[zones.size()];
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61
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62 for (int i = 0, Z = zones.size(); i < Z; i++) {
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63 DischargeZone zone = zones.get(i);
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64
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65 String lower = zone.getLowerDischarge();
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66 String upper = zone.getUpperDischarge();
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67
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68 if (lower.equals(upper)) {
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69 kvp[i] = new KVP(zone.getId(), lower);
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70 }
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71 else {
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72 kvp[i] = new KVP(zone.getId(), lower + " - " + upper);
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73 }
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74 }
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75
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76 return kvp;
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77 }
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78
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79
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80 @Override
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81 protected String getLabelFor(
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82 CallContext cc,
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83 String parameterName,
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84 int value
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85 ) throws IllegalArgumentException
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86 {
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87 if (!testParameterName(parameterName)) {
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88 throw new IllegalArgumentException(
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89 "Invalid parameter for state: '" + parameterName + "'");
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90 }
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91
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92 DischargeZone zone = DischargeZone.getDischargeZoneById(value);
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93
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94 if (zone == null) {
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95 throw new IllegalArgumentException(
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96 "Invalid id for DischargeZone: '" + value + "'");
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97 }
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98
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99 String lo = zone.getLowerDischarge();
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100 String hi = zone.getUpperDischarge();
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101
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102 return hi != null && lo.equals(hi)
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103 ? lo + " - " + hi
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104 : lo;
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105 }
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106
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107
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108 /**
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109 * This method might be used to test, if a parameter name is handled by this
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110 * state.
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111 *
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112 * @param parameterName The name of a parameter.
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113 *
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114 * @return true, if parameterName is one of <i>MAIN_CHANNEL</i> or
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115 * <i>TOTAL_CHANNEL</i>. Otherwise false.
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116 */
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117 protected boolean testParameterName(String parameterName) {
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118 if (parameterName == null || parameterName.length() == 0) {
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119 return false;
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120 }
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121 else if (parameterName.equals(MAIN_CHANNEL)) {
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122 return true;
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123 }
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124 else if (parameterName.equals(TOTAL_CHANNEL)) {
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125 return true;
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126 }
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127 else {
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128 return false;
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129 }
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130 }
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131
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132
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133 /**
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134 * Returns all discharge zones for a given river. The river information is
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135 * extracted from <i>artifact</i> using FLYSUtils.getRiver().
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136 *
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137 * @param artifact Needs to be a FLYSArtifact that stores a rivername.
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138 *
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139 * @return a list of DischargeZones.
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140 *
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141 * @throws IllegalArgumentException if no river information is provided by
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142 * <i>artifact</i>.
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143 */
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144 protected List<DischargeZone> getDischargeZones(Artifact artifact)
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145 throws IllegalArgumentException
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146 {
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147 River river = FLYSUtils.getRiver((FLYSArtifact) artifact);
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148
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149 if (river == null) {
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150 throw new IllegalArgumentException("No river found");
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151 }
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152
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153 List<DischargeZone> zones = DischargeZone.getDischargeZones(river);
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154
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155 logger.debug("Found " + zones.size() + " DischargeZones.");
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156
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157 return zones;
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158 }
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159 }
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160 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org