Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java @ 2092:0ccabd82ec76

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Added missing service to invalidate the caches via the REST interface. flys-artifacts/trunk@3620 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sat, 07 Jan 2012 08:02:56 +0000
parents a8aa343799a2
children 2d0b22602fc2
rev   line source
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1 package de.intevation.flys.artifacts;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5
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6 import org.w3c.dom.Document;
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7 import org.w3c.dom.Element;
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8
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9 import org.apache.log4j.Logger;
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10
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11 import net.sf.ehcache.Cache;
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12
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13 import de.intevation.artifacts.Artifact;
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14 import de.intevation.artifacts.ArtifactNamespaceContext;
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15 import de.intevation.artifacts.CallContext;
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16 import de.intevation.artifacts.CallMeta;
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17
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18 import de.intevation.artifactdatabase.ProtocolUtils;
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19 import de.intevation.artifactdatabase.state.Facet;
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20 import de.intevation.artifactdatabase.state.Output;
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21 import de.intevation.artifactdatabase.state.State;
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22 import de.intevation.artifactdatabase.state.StateEngine;
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23
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24 import de.intevation.artifacts.common.utils.XMLUtils;
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25
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26 import de.intevation.flys.artifacts.states.DefaultState;
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27 import de.intevation.flys.artifacts.cache.CacheFactory;
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28 import de.intevation.flys.artifacts.context.FLYSContext;
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29 import de.intevation.flys.artifacts.model.AnnotationsFactory;
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30
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31 import de.intevation.flys.model.Annotation;
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32
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33 import de.intevation.flys.utils.FLYSUtils;
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34
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35 /**
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36 * Artifact to access names of Points Of Interest along a segment of a river.
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37 */
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38 public class AnnotationArtifact extends StaticFLYSArtifact {
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39
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40 /** The logger for this class. */
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41 private static Logger logger = Logger.getLogger(AnnotationArtifact.class);
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42
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43 /** The name of the artifact. */
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44 public static final String ARTIFACT_NAME = "annotation";
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45
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46 /* Name of cache. */
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47 public static final String CACHE_NAME = "annotations";
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48
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49 @Override
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50 protected void initialize(Artifact artifact, Object context,
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51 CallMeta meta) {
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52 logger.debug("AnnotationArtifact.initialize, id: "
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53 + artifact.identifier());
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54
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55 FLYSArtifact flys = (FLYSArtifact) artifact;
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56 addData("river", flys.getData("river"));
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57
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58 List<Facet> fs = new ArrayList<Facet>();
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59
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60 // TODO Add CallMeta (duplicate TODO in RiverAxisArtifact.java).
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61 DefaultState state = (DefaultState) getCurrentState(context);
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62 state.computeInit(this, hash(), context, meta, fs);
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63
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64 if (!fs.isEmpty()) {
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65 logger.debug("Facets to add in AnnotationsArtifact.initialize .");
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66 facets.put(getCurrentStateId(), fs);
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67 }
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68 else {
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69 logger.debug("No facets to add in AnnotationsArtifact.initialize .");
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70 }
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71 }
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72
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73
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74 public double[] getDistance() {
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75 /** TODO In initialize(), access maximal range of river (via
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76 * AnnotationFactory) instead of overriding getDistance,
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77 * important for diagram generation. */
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78 return new double[] {0f, 1000f};
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79 }
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80
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81
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82 /**
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83 * Create the description of this AnnotationArtifact-instance.
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84 *
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85 * @param data Some data.
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86 * @param context The CallContext.
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87 *
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88 * @return the description of this artifact.
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89 */
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90 @Override
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91 public Document describe(Document data, CallContext context) {
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92 logger.debug("Describe: the current state is: " + getCurrentStateId());
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93
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94 if (logger.isDebugEnabled()) {
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95 dumpArtifact();
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96 }
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97
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98 FLYSContext flysContext = FLYSUtils.getFlysContext(context);
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99 StateEngine stateEngine = (StateEngine) flysContext.get(
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100 FLYSContext.STATE_ENGINE_KEY);
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101
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102 Document description = XMLUtils.newDocument();
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103 XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
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104 description,
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105 ArtifactNamespaceContext.NAMESPACE_URI,
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106 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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107
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108 Element root = ProtocolUtils.createRootNode(creator);
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109 description.appendChild(root);
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110
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111 State current = getCurrentState(context);
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112
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113 ProtocolUtils.appendDescribeHeader(creator, root, identifier(), hash());
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114 ProtocolUtils.appendState(creator, root, current);
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115
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116 Element name = ProtocolUtils.createArtNode(
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117 creator, "name",
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118 new String[] { "value" },
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119 new String[] { getName() });
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120
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121 Element outs = ProtocolUtils.createArtNode(
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122 creator, "outputmodes", null, null);
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123 appendOutputModes(description, outs, context);
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124
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125 root.appendChild(name);
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126 root.appendChild(outs);
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127
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128 return description;
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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 * Returns the name of the concrete artifact.
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134 *
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135 * @return the name of the concrete artifact.
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136 */
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137 public String getName() {
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138 return ARTIFACT_NAME;
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139 }
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140
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141
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142 /**
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143 * Append outputmode elements to given document.
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144 *
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145 * @param doc Document to add outputmodes to.
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146 * @param outs Element to add outputmode elements to.
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147 * @param context The given CallContext (mostly for internationalization).
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148 */
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149 //@Override
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150 protected void appendOutputModes(
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151 Document doc,
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152 Element outs,
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153 CallContext context)
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154 {
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155 List<String> stateIds = getPreviousStateIds();
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156
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157 XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
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158 doc,
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159 ArtifactNamespaceContext.NAMESPACE_URI,
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160 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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161
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a8aa343799a2 Extracet getFlysContext from FLYSArtifact to FLYSUtils.
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162 FLYSContext flysContext = FLYSUtils.getFlysContext(context);
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163 StateEngine engine = (StateEngine) flysContext.get(
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164 FLYSContext.STATE_ENGINE_KEY);
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165
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166 for (String stateId: stateIds) {
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167 logger.debug("Append output modes for state: " + stateId);
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168 DefaultState state = (DefaultState) engine.getState(stateId);
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169
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170 List<Output> list = state.getOutputs();
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171 if (list == null || list.size() == 0) {
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172 logger.debug("-> No output modes for this state.");
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173 continue;
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174 }
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175
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176 List<Facet> fs = facets.get(stateId);
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177 if (fs == null || fs.size() == 0) {
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178 logger.debug("No facets found.");
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179 continue;
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180 }
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181
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182 logger.debug("Found " + fs.size() + " facets in previous states.");
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183
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184 List<Output> generated = generateOutputs(list, fs);
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185
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186 ProtocolUtils.appendOutputModes(doc, outs, generated);
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187 }
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188
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189 try {
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190 DefaultState cur = (DefaultState) getCurrentState(context);
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191 if (cur.validate(this)) {
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192 List<Output> list = cur.getOutputs();
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193 if (list != null && list.size() > 0) {
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194 logger.debug(
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195 "Append output modes for state: " + cur.getID());
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196
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197 List<Facet> fs = facets.get(cur.getID());
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198 if (fs != null && fs.size() > 0) {
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199 List<Output> generated = generateOutputs(list, fs);
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200
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201 logger.debug("Found " + fs.size() + " current facets.");
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202 if (!generated.isEmpty()) {
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203 ProtocolUtils.appendOutputModes(
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204 doc, outs, generated);
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205 }
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206 else{
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207 logger.debug("Cannot append output to generated document.");
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208 }
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209 }
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210 else {
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211 logger.debug("No facets found for the current state.");
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212 }
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213 }
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214 }
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215 }
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216 catch (IllegalArgumentException iae) {
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217 // state is not valid, so we do not append its outputs.
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218 }
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219 }
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220
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221
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222 /**
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223 * Get Annotations for Points (opposed to segments) in river in range.
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224 *
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225 * @return list of Annotations.
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226 */
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227 public List<Annotation> getAnnotations() {
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228 String river = FLYSUtils.getRiver(this).getName();
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229 logger.debug("Search annotations for river: " + river);
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230
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231 Cache cache = CacheFactory.getCache(CACHE_NAME);
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232 String key = river;
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233 Object old = null;
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234
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235 if (cache != null) {
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236 logger.debug("We are using a cache for annotations.");
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237
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238 net.sf.ehcache.Element element = cache.get(key);
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239 if (element != null) {
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240 logger.info("Fetched annotations from cache.");
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241 old = element.getValue();
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242 }
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243 }
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244
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245 if (old == null) {
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246 old = getAnnotationsUncached(river);
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247 }
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248
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249 if (cache != null && old != null) {
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250 cache.put(new net.sf.ehcache.Element(key, old));
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251 }
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252
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253 return old != null
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254 ? (List<Annotation>) old
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255 : new ArrayList<Annotation>();
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256 }
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257
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258 /**
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259 * Gets Annotations from Session/Database.
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260 *
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261 * @return List of Annotations fetched fresh from session/database.
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262 * @see DistanceInfoService to access cached documents.
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263 */
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264 protected List<Annotation> getAnnotationsUncached(String river) {
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265 logger.info("Fetch annotations from database.");
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266
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267 List<Annotation> annotations = new ArrayList<Annotation>();
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268 annotations = AnnotationsFactory.getPointAnnotations(river);
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269
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270 return annotations;
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271 }
a39511688679 Added initial version of AnnotationArtifact and friends.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
272 }
a39511688679 Added initial version of AnnotationArtifact and friends.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
273 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org