Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/SedimentDensityArtifact.java @ 7471:fff862f4ef76

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Experimental caching of datacage recommendations. The respective hook is called a lot and running the datacage over and over again when loading data can be expensive. So the generated recommendations are cached for some time. Hopefully this improves the overall speed of loading data from the datacage.
author Sascha L. Teichmann <teichmann@intevation.de>
date Wed, 30 Oct 2013 15:26:21 +0100
parents 5ac4c9119aef
children 8d5ca5175038
rev   line source
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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;
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10
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11 import java.util.ArrayList;
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12 import java.util.List;
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13
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14 import org.apache.log4j.Logger;
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15 import org.w3c.dom.Document;
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16
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17 import org.dive4elements.artifactdatabase.state.DefaultOutput;
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18 import org.dive4elements.artifactdatabase.state.Facet;
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19 import org.dive4elements.artifactdatabase.state.FacetActivity;
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20 import org.dive4elements.artifactdatabase.state.State;
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21 import org.dive4elements.artifacts.Artifact;
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22 import org.dive4elements.artifacts.ArtifactFactory;
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23 import org.dive4elements.artifacts.CallMeta;
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24 import org.dive4elements.artifacts.common.utils.XMLUtils;
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25 import org.dive4elements.river.artifacts.states.DefaultState.ComputeType;
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26 import org.dive4elements.river.artifacts.model.minfo.SedimentDensityFacet;
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27 import org.dive4elements.river.artifacts.model.minfo.SedimentDensityFactory;
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28 import org.dive4elements.river.artifacts.resources.Resources;
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29 import org.dive4elements.river.artifacts.states.StaticState;
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30
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31 import org.dive4elements.river.artifacts.model.FacetTypes;
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32
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33
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34 /** Artifact to access sediment density measurements. */
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35 public class SedimentDensityArtifact
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36 extends StaticD4EArtifact
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37 implements FacetTypes
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38 {
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39 /** The logger for this class. */
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40 private static Logger logger =
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41 Logger.getLogger(SedimentDensityArtifact.class);
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42
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43 /** Artifact key name. */
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44 private static final String NAME = "sedimentdensity";
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45
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46 /** Spawn only inactive facets. */
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47 static {
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48 // TODO: Move to configuration.
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49 FacetActivity.Registry.getInstance()
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50 .register(NAME, FacetActivity.INACTIVE);
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51 }
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52
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53 /** Need to give the state an id. */
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54 public static final String STATIC_STATE_NAME =
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55 "state.sedimentdensity.static";
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56
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57 /** One and only state to be in. */
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58 protected transient State state = null;
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59
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60 protected String DATA_ID = "ID";
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61
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62 /**
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63 * Trivial Constructor.
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64 */
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65 public SedimentDensityArtifact() {
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66 logger.debug("SedimentDensityArtifact.SedimentDensityArtifact");
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67 }
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68
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69
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70 /** Get artifact key name. */
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71 @Override
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72 public String getName() {
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73 return NAME;
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74 }
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75
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76
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77 private Object getSedimentDensity() {
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78 logger.debug("SedimentDensityArtifact.getSedimentDensity");
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79 Integer id = getDataAsInteger(DATA_ID);
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80
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81 // TODO use cache if possible
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82 return SedimentDensityFactory.getSedimentDensityUncached(id);
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83 }
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84
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85
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86 private State newDensityState() {
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87 return new StaticState(STATIC_STATE_NAME) {
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88 public Object staticCompute(List<Facet> facets) {
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89 return getSedimentDensity();
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90 }
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91 };
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92 }
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93
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94
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95 /** Create a new state with bogus output. */
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96 protected State spawnState() {
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97 state = newDensityState();
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98 List<Facet> fs = getFacets(STATIC_STATE_NAME);
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99 DefaultOutput output = new DefaultOutput(
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100 "general",
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101 "general",
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102 "image/png",
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103 fs,
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104 "chart");
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105
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106 state.getOutputs().add(output);
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107
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108 return state;
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109 }
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110
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111
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112 /**
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113 * Gets called from factory, to set things up.
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114 */
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115 @Override
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116 public void setup(
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117 String identifier,
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118 ArtifactFactory factory,
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119 Object context,
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120 CallMeta callMeta,
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121 Document data)
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122 {
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123 logger.debug("SedimentDensityArtifact.setup");
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124
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125 state = newDensityState();
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126 if (logger.isDebugEnabled()) {
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127 logger.debug(XMLUtils.toString(data));
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128 }
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129
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130 List<Facet> fs = new ArrayList<Facet>();
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131
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132 String code = getDatacageIDValue(data);
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133
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134 if (code != null) {
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135 double[] depth = SedimentDensityFactory.getDepth(Integer.valueOf(code));
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136
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137 String name = Resources.getMsg(callMeta, "sedimentdensity", "sedimentdensity");
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138 name += " " + depth[0] + " - " + depth[1] + " cm";
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139 Facet facet = new SedimentDensityFacet(
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140 0,
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141 SEDIMENT_DENSITY,
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142 name,
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143 ComputeType.ADVANCE, state.getID(), "hash"
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144 );
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145 fs.add(facet);
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146 addFacets(state.getID(), fs);
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147 addStringData(DATA_ID, code);
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148 }
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149 else {
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150 logger.error("No id given.");
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151 }
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152
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153 spawnState();
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154 super.setup(identifier, factory, context, callMeta, data);
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155 }
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156
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157
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158 /**
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159 * Get a list containing the one and only State.
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160 * @param context ignored.
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161 * @return list with one and only state.
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162 */
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163 @Override
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164 protected List<State> getStates(Object context) {
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165 ArrayList<State> states = new ArrayList<State>();
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166 states.add(getState());
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167 return states;
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168 }
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169
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170
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171 /**
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172 * Get the "current" state (there is but one).
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173 * @param cc ignored.
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174 * @return the "current" (only possible) state.
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175 */
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176 @Override
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177 public State getCurrentState(Object cc) {
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178 return getState();
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179 }
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180
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181
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182 /**
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183 * Get the only possible state.
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184 * @return the state.
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185 */
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186 protected State getState() {
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187 return getState(null, null);
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188 }
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189
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190
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191 /**
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192 * Get the state.
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193 * @param context ignored.
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194 * @param stateID ignored.
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195 * @return the state.
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196 */
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197 @Override
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198 protected State getState(Object context, String stateID) {
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199 return (state != null)
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200 ? state
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201 : spawnState();
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202 }
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203
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204
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205 /**
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206 * Called via setup. Overridden to avoid cloning all data.
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207 *
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208 * @param artifact The master-artifact.
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209 */
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210 @Override
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211 protected void initialize(
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212 Artifact artifact,
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213 Object context,
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214 CallMeta meta)
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215 {
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216 logger.debug("SedimentDensityArtifact.initialize");
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217 }
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218 }
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219 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org