annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java @ 937:9e813e9137a5

Added a monitor that creates new artifacts for default themes in charts and maps. flys-artifacts/trunk@2329 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 14 Jul 2011 11:27:01 +0000
parents
children f4439e015278
rev   line source
937
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1 package de.intevation.flys.artifacts;
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2
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3 import java.io.File;
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4 import java.util.ArrayList;
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5 import java.util.HashMap;
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6 import java.util.List;
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7 import java.util.Map;
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8
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9 import javax.xml.xpath.XPathConstants;
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10
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11 import org.apache.log4j.Logger;
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12
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13 import org.w3c.dom.Document;
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14 import org.w3c.dom.Element;
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15 import org.w3c.dom.Node;
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16 import org.w3c.dom.NodeList;
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17
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18 import de.intevation.artifacts.Artifact;
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19 import de.intevation.artifacts.ArtifactDatabase;
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20 import de.intevation.artifacts.ArtifactDatabaseException;
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21 import de.intevation.artifacts.ArtifactNamespaceContext;
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22 import de.intevation.artifacts.CallContext;
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23 import de.intevation.artifacts.Hook;
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24
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25 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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26 import de.intevation.artifacts.common.utils.Config;
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27 import de.intevation.artifacts.common.utils.XMLUtils;
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28
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29
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30 public class CollectionMonitor implements Hook {
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31
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32 public static final String XPATH_UUID = "/art:result/art:uuid/@art:value";
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33 public static final String XPATH_HASH = "/art:result/art:hash/@art:value";
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35
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36 public class LoadArtifact {
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37 public String factory;
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38 public List<String> parameters;
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39
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40 public LoadArtifact(String factory) {
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41 this.factory = factory;
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42 this.parameters = new ArrayList<String>();
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43 }
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44
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45 public void addParameter(String parameter) {
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46 parameters.add(parameter);
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47 }
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48 } // end of class LoadArtifact
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50
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51 public static final String XPATH_STATES = "output-defaults/state";
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53
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54 protected Map<String, List<LoadArtifact>> states;
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56
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57 private static final Logger logger =
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58 Logger.getLogger(CollectionMonitor.class);
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59
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60
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61 @Override
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62 public void setup(Node cfg) {
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63 Element config = (Element) cfg;
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64 String xlink = config.getAttribute("xlink:href");
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65 xlink = Config.replaceConfigDir(xlink);
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66
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67 File file = new File(xlink);
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68
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69 if (file == null || !file.exists()) {
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70 logger.error("The config file '" + xlink + "' does not exist.");
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71 return;
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72 }
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73
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74 Document outputDefaults = XMLUtils.parseDocument(file);
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75
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76 NodeList states = (NodeList) XMLUtils.xpath(
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77 outputDefaults,
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78 XPATH_STATES,
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79 XPathConstants.NODESET);
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80
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81 int len = states != null ? states.getLength() : 0;
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82
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83 this.states = new HashMap<String, List<LoadArtifact>>(len);
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84
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85 for (int i = 0; i < len; i++) {
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86 Element state = (Element) states.item(i);
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87
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88 String stateId = state.getAttribute("id");
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89 List<LoadArtifact> artifacts = parseLoadArtifacts(state);
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90
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91 if (artifacts != null) {
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92 this.states.put(stateId, artifacts);
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93 }
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94 }
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95 }
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97
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98 protected List<LoadArtifact> parseLoadArtifacts(Element state) {
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99 NodeList artifacts = (NodeList) XMLUtils.xpath(
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100 state, "artifact", XPathConstants.NODESET);
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101
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102 int len = artifacts != null ? artifacts.getLength() : 0;
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103
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104 List<LoadArtifact> loadArtifacts = new ArrayList<LoadArtifact>(len);
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105
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106 for (int i = 0; i < len; i++) {
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107 LoadArtifact la = parseLoadArtifact((Element) artifacts.item(i));
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108
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109 if (la != null) {
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110 loadArtifacts.add(la);
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111 }
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112 }
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113
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114 return loadArtifacts;
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115 }
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116
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117
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118 protected LoadArtifact parseLoadArtifact(Element art) {
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119 String factory = art.getAttribute("factory");
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120
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121 LoadArtifact artifact = new LoadArtifact(factory);
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122
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123 NodeList parameters = (NodeList) XMLUtils.xpath(
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124 art, "parameter", XPathConstants.NODESET);
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125
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126 int len = parameters != null ? parameters.getLength() : 0;
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127
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128 for (int i = 0; i < len; i++) {
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129 Element parameter = (Element) parameters.item(i);
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130 artifact.addParameter(parameter.getAttribute("name"));
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131 }
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132
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133 return artifact;
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134 }
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135
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136
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137 @Override
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138 public void execute(Artifact artifact, CallContext context) {
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139 FLYSArtifact flys = (FLYSArtifact) artifact;
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140
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141 String stateId = flys.getCurrentStateId();
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142
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143 List<LoadArtifact> loadArtifacts = states.get(stateId);
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144
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145 if (loadArtifacts == null || loadArtifacts.isEmpty()) {
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146 return;
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147 }
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148
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149 ArtifactDatabase db = context.getDatabase();
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150 List<String> uuids = new ArrayList<String>();
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151
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152 for (LoadArtifact rawArtifact: loadArtifacts) {
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153 String[] art = createArtifact(db, context, rawArtifact);
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154
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155 if (art != null && art.length >= 2) {
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156 Document feed = prepareFeed(
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157 artifact, rawArtifact, art[0], art[1]);
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158
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159 boolean success = initializeArtifact(db, context, feed, art[0]);
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160
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161 if (success) {
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162 uuids.add(art[0]);
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163 }
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164 }
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165 }
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166
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167 // TODO ADD UUIDS TO DESCRIBE
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168 }
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169
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170
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171 protected String[] createArtifact(
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172 ArtifactDatabase db,
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173 CallContext cc,
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174 LoadArtifact raw)
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175 {
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176 Document create = ClientProtocolUtils.newCreateDocument(raw.factory);
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177
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178 try {
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179 Document result = db.createArtifactWithFactory(
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180 raw.factory, cc.getMeta(), create);
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181
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182 String uuid = XMLUtils.xpathString(
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183 result, XPATH_UUID, ArtifactNamespaceContext.INSTANCE);
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184 String hash = XMLUtils.xpathString(
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185 result, XPATH_HASH, ArtifactNamespaceContext.INSTANCE);
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186
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187 return new String[] {uuid, hash};
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188 }
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189 catch (ArtifactDatabaseException ade) {
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190 logger.error(ade, ade);
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191 }
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192
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193 return null;
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194 }
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195
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196
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197 protected Document prepareFeed(
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198 Artifact artifact,
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199 LoadArtifact rawArtifact,
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200 String uuid,
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201 String hash)
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202 {
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203 FLYSArtifact flys = (FLYSArtifact) artifact;
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204
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205 String[][] data = new String[rawArtifact.parameters.size()][2];
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206
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207 for (int i = 0, len = rawArtifact.parameters.size(); i < len; i++) {
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208 String param = rawArtifact.parameters.get(i);
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209 String value = flys.getDataAsString(param);
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210
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211 if (value != null) {
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212 data[i][0] = param;
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213 data[i][1] = value;
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214 }
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215 }
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216
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217 return ClientProtocolUtils.newFeedDocument(uuid, hash, data);
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218 }
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219
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220
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221 protected boolean initializeArtifact(
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222 ArtifactDatabase db,
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223 CallContext cc,
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224 Document feed,
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225 String uuid)
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226 {
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227 try {
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228 db.feed(uuid, feed, cc.getMeta());
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229
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230 return true;
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231 }
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232 catch (ArtifactDatabaseException adbe) {
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233 logger.error(adbe, adbe);
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234 }
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235
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236 return false;
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237 }
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238 }
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239 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

http://dive4elements.wald.intevation.org