Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java @ 2120:f021080cb409

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Use improved caching for cross section lines data. flys-artifacts/trunk@3690 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 16 Jan 2012 17:38:39 +0000
parents 2d0b22602fc2
children a4bdf7d8527e
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 /** Get river, setup Facets. */
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50 @Override
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51 protected void initialize(Artifact artifact, Object context,
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52 CallMeta meta) {
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53 logger.debug("AnnotationArtifact.initialize, id: "
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54 + artifact.identifier());
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55
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56 FLYSArtifact flys = (FLYSArtifact) artifact;
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57 importData(flys, "river");
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58
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59 List<Facet> fs = new ArrayList<Facet>();
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60
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61 // TODO Add CallMeta (duplicate TODO in RiverAxisArtifact.java).
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62 DefaultState state = (DefaultState) getCurrentState(context);
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63 state.computeInit(this, hash(), context, meta, fs);
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64
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65 if (!fs.isEmpty()) {
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66 logger.debug("Facets to add in AnnotationsArtifact.initialize .");
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67 facets.put(getCurrentStateId(), fs);
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68 }
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69 else {
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70 logger.debug("No facets to add in AnnotationsArtifact.initialize .");
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71 }
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72 }
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73
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74
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75 public double[] getDistance() {
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76 /** TODO In initialize(), access maximal range of river (via
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77 * AnnotationFactory) instead of overriding getDistance,
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78 * important for diagram generation. */
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79 return new double[] {0f, 1000f};
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80 }
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81
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82
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83 /**
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84 * Create the description of this AnnotationArtifact-instance.
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85 *
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86 * @param data Some data.
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87 * @param context The CallContext.
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88 *
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89 * @return the description of this artifact.
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90 */
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91 @Override
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92 public Document describe(Document data, CallContext context) {
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93 logger.debug("Describe: the current state is: " + getCurrentStateId());
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94
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95 if (logger.isDebugEnabled()) {
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96 dumpArtifact();
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97 }
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98
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99 FLYSContext flysContext = FLYSUtils.getFlysContext(context);
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100 StateEngine stateEngine = (StateEngine) flysContext.get(
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101 FLYSContext.STATE_ENGINE_KEY);
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102
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103 Document description = XMLUtils.newDocument();
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104 XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
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105 description,
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106 ArtifactNamespaceContext.NAMESPACE_URI,
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107 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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108
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109 Element root = ProtocolUtils.createRootNode(creator);
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110 description.appendChild(root);
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111
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112 State current = getCurrentState(context);
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113
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114 ProtocolUtils.appendDescribeHeader(creator, root, identifier(), hash());
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115 ProtocolUtils.appendState(creator, root, current);
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116
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117 Element name = ProtocolUtils.createArtNode(
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118 creator, "name",
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119 new String[] { "value" },
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120 new String[] { getName() });
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121
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122 Element outs = ProtocolUtils.createArtNode(
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123 creator, "outputmodes", null, null);
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124 appendOutputModes(description, outs, context);
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125
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126 root.appendChild(name);
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127 root.appendChild(outs);
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128
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129 return description;
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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 the name of the concrete artifact.
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135 *
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136 * @return the name of the concrete artifact.
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137 */
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138 public String getName() {
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139 return ARTIFACT_NAME;
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140 }
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141
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142
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143 /**
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144 * Append outputmode elements to given document.
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145 *
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146 * @param doc Document to add outputmodes to.
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147 * @param outs Element to add outputmode elements to.
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148 * @param context The given CallContext (mostly for internationalization).
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149 */
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150 //@Override
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151 protected void appendOutputModes(
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152 Document doc,
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153 Element outs,
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154 CallContext context)
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155 {
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156 List<String> stateIds = getPreviousStateIds();
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157
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158 XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
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159 doc,
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160 ArtifactNamespaceContext.NAMESPACE_URI,
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161 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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162
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a8aa343799a2 Extracet getFlysContext from FLYSArtifact to FLYSUtils.
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163 FLYSContext flysContext = FLYSUtils.getFlysContext(context);
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164 StateEngine engine = (StateEngine) flysContext.get(
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165 FLYSContext.STATE_ENGINE_KEY);
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166
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167 for (String stateId: stateIds) {
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168 logger.debug("Append output modes for state: " + stateId);
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169 DefaultState state = (DefaultState) engine.getState(stateId);
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170
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171 List<Output> list = state.getOutputs();
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172 if (list == null || list.size() == 0) {
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173 logger.debug("-> No output modes for this state.");
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174 continue;
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175 }
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176
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c62ff9e72cea Restore mapping of state id to facets (revert, rev 3083 and 3088).
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177 List<Facet> fs = facets.get(stateId);
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178 if (fs == null || fs.size() == 0) {
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179 logger.debug("No facets found.");
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180 continue;
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181 }
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182
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183 logger.debug("Found " + fs.size() + " facets in previous states.");
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184
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185 List<Output> generated = generateOutputs(list, fs);
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186
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187 ProtocolUtils.appendOutputModes(doc, outs, generated);
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188 }
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189
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190 try {
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191 DefaultState cur = (DefaultState) getCurrentState(context);
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eccf966fb677 State engine: Removed CallContext from state validation.
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192 if (cur.validate(this)) {
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193 List<Output> list = cur.getOutputs();
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194 if (list != null && list.size() > 0) {
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195 logger.debug(
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196 "Append output modes for state: " + cur.getID());
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197
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198 List<Facet> fs = facets.get(cur.getID());
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199 if (fs != null && fs.size() > 0) {
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200 List<Output> generated = generateOutputs(list, fs);
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201
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202 logger.debug("Found " + fs.size() + " current facets.");
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203 if (!generated.isEmpty()) {
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204 ProtocolUtils.appendOutputModes(
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205 doc, outs, generated);
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206 }
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207 else{
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208 logger.debug("Cannot append output to generated document.");
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209 }
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210 }
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211 else {
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212 logger.debug("No facets found for the current state.");
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213 }
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214 }
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215 }
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216 }
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217 catch (IllegalArgumentException iae) {
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218 // state is not valid, so we do not append its outputs.
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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 /**
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224 * Get Annotations for Points (opposed to segments) in river in range.
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225 *
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226 * @return list of Annotations.
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227 */
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228 public List<Annotation> getAnnotations() {
1099
af73f196eccc Refactored to use new FLYSUtils, moved getRiver-functionality inside.
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229 String river = FLYSUtils.getRiver(this).getName();
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230 logger.debug("Search annotations for river: " + river);
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231
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232 Cache cache = CacheFactory.getCache(CACHE_NAME);
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233 String key = river;
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234 Object old = null;
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235
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236 if (cache != null) {
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237 logger.debug("We are using a cache for annotations.");
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238
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diff changeset
239 net.sf.ehcache.Element element = cache.get(key);
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240 if (element != null) {
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diff changeset
241 logger.info("Fetched annotations from cache.");
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242 old = element.getValue();
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243 }
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244 }
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245
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diff changeset
246 if (old == null) {
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diff changeset
247 old = getAnnotationsUncached(river);
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248 }
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249
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diff changeset
250 if (cache != null && old != null) {
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diff changeset
251 cache.put(new net.sf.ehcache.Element(key, old));
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252 }
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253
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254 return old != null
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diff changeset
255 ? (List<Annotation>) old
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256 : new ArrayList<Annotation>();
1032
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diff changeset
257 }
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258
2112
2d0b22602fc2 Cosmetics.
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diff changeset
259
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diff changeset
260 /**
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261 * Gets Annotations from Session/Database.
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diff changeset
262 *
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263 * @return List of Annotations fetched fresh from session/database.
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diff changeset
264 * @see DistanceInfoService to access cached documents.
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diff changeset
265 */
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diff changeset
266 protected List<Annotation> getAnnotationsUncached(String river) {
1675
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diff changeset
267 logger.info("Fetch annotations from database.");
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268
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diff changeset
269 List<Annotation> annotations = new ArrayList<Annotation>();
1631
26e19cdaed5e Improved database session handling in services and artifacts.
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diff changeset
270 annotations = AnnotationsFactory.getPointAnnotations(river);
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271
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a39511688679 Added initial version of AnnotationArtifact and friends.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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272 return annotations;
a39511688679 Added initial version of AnnotationArtifact and friends.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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273 }
a39511688679 Added initial version of AnnotationArtifact and friends.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
274 }
a39511688679 Added initial version of AnnotationArtifact and friends.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
275 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org