Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java @ 2089:0da8874bd378

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Added initial state to map artifact to be able to advance and step back. The map artifact overrides describe() to have the complete UI information in the describe response document. flys-artifacts/trunk@3613 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Fri, 06 Jan 2012 12:02:10 +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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c62ff9e72cea Restore mapping of state id to facets (revert, rev 3083 and 3088).
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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() {
1099
af73f196eccc Refactored to use new FLYSUtils, moved getRiver-functionality inside.
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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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diff changeset
236 logger.debug("We are using a cache for annotations.");
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237
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diff changeset
238 net.sf.ehcache.Element element = cache.get(key);
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239 if (element != null) {
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diff changeset
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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diff changeset
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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diff changeset
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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diff changeset
263 */
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diff changeset
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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diff changeset
267 List<Annotation> annotations = new ArrayList<Annotation>();
1631
26e19cdaed5e Improved database session handling in services and artifacts.
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diff changeset
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:
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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