Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/ArtifactDatabaseImpl.java @ 66:89e3de0ee05f
Implemented some methods to get access to ArtifactFactories which are stored in the ArtifactDatabase.
artifacts/trunk@546 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 15 Jan 2010 17:39:32 +0000 |
parents | 39fec7d714dc |
children | 541814404822 |
rev | line source |
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1 package de.intevation.artifactdatabase; |
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2 |
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3 import java.util.HashMap; |
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4 import java.util.HashSet; |
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5 import java.util.ArrayList; |
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6 import java.util.List; |
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7 |
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8 import de.intevation.artifacts.ArtifactDatabaseException; |
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9 import de.intevation.artifacts.ArtifactDatabase; |
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10 import de.intevation.artifacts.ArtifactFactory; |
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11 import de.intevation.artifacts.Artifact; |
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12 import de.intevation.artifacts.CallContext; |
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13 import de.intevation.artifacts.CallMeta; |
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14 |
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15 import de.intevation.artifactdatabase.Backend.PersistentArtifact; |
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16 |
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17 import org.apache.log4j.Logger; |
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18 |
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19 import org.w3c.dom.Document; |
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20 |
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21 import java.io.OutputStream; |
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22 import java.io.IOException; |
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23 |
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24 /** |
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25 * @author Sascha L. Teichmann |
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26 */ |
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27 public class ArtifactDatabaseImpl |
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28 implements ArtifactDatabase, Id.Filter, Backend.FactoryLookup |
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29 { |
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30 private static Logger logger = |
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31 Logger.getLogger(ArtifactDatabaseImpl.class); |
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32 |
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33 public static final String NO_SUCH_FACTORY = |
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34 "No such factory"; |
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35 |
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36 public static final String NO_SUCH_ARTIFACT = |
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37 "No such artifact"; |
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38 |
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39 public static final String NOT_IN_BACKGROUND = |
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40 "Not in background"; |
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41 |
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42 public static final String INVALID_CALL_STATE = |
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43 "Invalid after call state"; |
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44 |
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45 public static final String CREATION_FAILED = |
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46 "Creation of artifact failed"; |
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47 |
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48 public static final String INTERNAL_ERROR = |
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49 "Creation of artifact failed"; |
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50 |
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51 public class CallContextImpl |
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52 implements CallContext |
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53 { |
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54 protected PersistentArtifact artifact; |
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55 protected int action; |
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56 protected CallMeta callMeta; |
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57 protected HashMap customValues; |
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58 |
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59 public CallContextImpl( |
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60 PersistentArtifact artifact, |
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61 int action, |
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62 CallMeta callMeta |
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63 ) { |
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64 this.artifact = artifact; |
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65 this.action = action; |
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66 this.callMeta = callMeta; |
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67 } |
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68 |
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69 public void afterCall(int action) { |
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70 this.action = action; |
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71 if (action == BACKGROUND) { |
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72 addIdToBackground(artifact.getId()); |
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73 } |
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74 } |
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75 |
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76 public void afterBackground(int action) { |
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77 if (this.action != BACKGROUND) { |
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78 throw new IllegalStateException(NOT_IN_BACKGROUND); |
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79 } |
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80 fromBackground(artifact, action); |
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81 } |
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82 |
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83 public Object globalContext() { |
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84 return context; |
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85 } |
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86 |
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87 public ArtifactDatabase getDatabase() { |
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88 return ArtifactDatabaseImpl.this; |
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89 } |
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90 |
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91 public CallMeta getMeta() { |
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92 return callMeta; |
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93 } |
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94 |
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95 public void postCall() { |
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96 switch (action) { |
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97 case NOTHING: |
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98 break; |
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99 case TOUCH: |
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100 artifact.touch(); |
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101 break; |
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102 case STORE: |
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103 artifact.store(); |
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104 break; |
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105 case BACKGROUND: |
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106 logger.warn("BACKGROUND processing is not fully implemented, yet!"); |
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107 artifact.store(); |
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108 break; |
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109 default: |
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110 logger.error(INVALID_CALL_STATE + ": " + action); |
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111 throw new IllegalStateException(INVALID_CALL_STATE); |
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112 } |
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113 } |
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114 |
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115 public Object getContextValue(Object key) { |
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116 return customValues != null |
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117 ? customValues.get(key) |
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118 : null; |
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119 } |
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120 |
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121 public Object putContextValue(Object key, Object value) { |
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122 if (customValues == null) { |
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123 customValues = new HashMap(); |
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124 } |
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125 return customValues.put(key, value); |
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126 } |
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127 } // class CallContextImpl |
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128 |
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129 public class DeferredOutputImpl |
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130 implements DeferredOutput |
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131 { |
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132 protected PersistentArtifact artifact; |
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133 protected Document format; |
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134 protected CallMeta callMeta; |
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135 |
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136 public DeferredOutputImpl() { |
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137 } |
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138 |
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139 public DeferredOutputImpl( |
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140 PersistentArtifact artifact, |
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141 Document format, |
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142 CallMeta callMeta |
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143 ) { |
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144 this.artifact = artifact; |
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145 this.format = format; |
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146 this.callMeta = callMeta; |
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147 } |
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148 |
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149 public void write(OutputStream output) throws IOException { |
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150 |
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151 CallContextImpl cc = new CallContextImpl( |
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152 artifact, CallContext.TOUCH, callMeta); |
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153 |
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154 try { |
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155 artifact.getArtifact().out(format, output, cc); |
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156 } |
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157 finally { |
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158 cc.postCall(); |
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159 } |
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160 } |
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161 } // class DeferredOutputImpl |
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162 |
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163 protected String [][] factoryNamesAndDescription; |
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164 protected HashMap name2factory; |
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165 |
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166 protected Backend backend; |
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167 protected Object context; |
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168 |
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169 protected HashSet backgroundIds; |
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170 |
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171 public ArtifactDatabaseImpl() { |
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172 } |
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173 |
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174 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap) { |
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175 this(bootstrap, null); |
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176 } |
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177 |
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178 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap, Backend backend) { |
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179 |
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180 backgroundIds = new HashSet(); |
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181 name2factory = new HashMap(); |
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182 |
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183 ArtifactFactory [] factories = bootstrap.getArtifactFactories(); |
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184 factoryNamesAndDescription = new String[factories.length][]; |
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185 |
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186 for (int i = 0; i < factories.length; ++i) { |
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187 |
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188 ArtifactFactory factory = factories[i]; |
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189 |
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190 String name = factory.getName(); |
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191 String description = factory.getDescription(); |
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192 |
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193 factoryNamesAndDescription[i] = |
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194 new String [] { name, description }; |
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195 |
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196 name2factory.put(name, factory); |
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197 } |
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198 |
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199 context = bootstrap.getContext(); |
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200 |
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201 wireWithBackend(backend); |
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202 } |
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203 |
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204 public void wireWithBackend(Backend backend) { |
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205 if (backend != null) { |
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206 this.backend = backend; |
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207 backend.setFactoryLookup(this); |
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208 } |
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209 } |
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210 |
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211 protected void fromBackground(PersistentArtifact artifact, int action) { |
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212 logger.warn("BACKGROUND processing is not fully implemented, yet!"); |
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213 switch (action) { |
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214 case CallContext.NOTHING: |
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215 break; |
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216 case CallContext.TOUCH: |
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217 artifact.touch(); |
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218 break; |
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219 case CallContext.STORE: |
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220 artifact.store(); |
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221 break; |
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222 default: |
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223 logger.warn("operation not allowed in fromBackground"); |
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224 } |
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225 removeIdFromBackground(artifact.getId()); |
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226 } |
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227 |
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228 protected void removeIdFromBackground(int id) { |
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229 synchronized (backgroundIds) { |
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230 backgroundIds.remove(Integer.valueOf(id)); |
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231 } |
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232 } |
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233 |
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234 protected void addIdToBackground(int id) { |
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235 synchronized (backgroundIds) { |
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236 backgroundIds.add(Integer.valueOf(id)); |
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237 } |
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238 } |
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239 |
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240 public List filterIds(List ids) { |
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241 int N = ids.size(); |
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242 ArrayList out = new ArrayList(N); |
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243 synchronized (backgroundIds) { |
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244 for (int i = 0; i < N; ++i) { |
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245 Id id = (Id)ids.get(i); |
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246 if (!backgroundIds.contains(Integer.valueOf(id.getId()))) { |
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247 out.add(id); |
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248 } |
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249 } |
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250 } |
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251 return out; |
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252 } |
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253 |
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254 public String [][] artifactFactoryNamesAndDescriptions() { |
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255 return factoryNamesAndDescription; |
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256 } |
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257 |
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258 public ArtifactFactory getInternalArtifactFactory(String factoryName) { |
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259 return getArtifactFactory(factoryName); |
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260 } |
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261 |
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262 public ArtifactFactory getArtifactFactory(String factoryName) { |
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263 return (ArtifactFactory)name2factory.get(factoryName); |
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264 } |
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265 |
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266 public Document createArtifactWithFactory( |
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267 String factoryName, |
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268 CallMeta callMeta |
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269 ) |
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270 throws ArtifactDatabaseException |
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271 { |
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272 ArtifactFactory factory = getArtifactFactory(factoryName); |
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273 |
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274 if (factory == null) { |
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275 throw new ArtifactDatabaseException(NO_SUCH_FACTORY); |
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276 } |
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277 |
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278 Artifact artifact = factory.createArtifact( |
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279 backend.newIdentifier(), |
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280 context); |
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281 |
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282 if (artifact == null) { |
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283 throw new ArtifactDatabaseException(CREATION_FAILED); |
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284 } |
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285 |
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286 PersistentArtifact persistentArtifact; |
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287 |
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288 try { |
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289 persistentArtifact = backend.storeInitially( |
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290 artifact, |
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291 factory, |
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292 factory.timeToLiveUntouched(artifact, context)); |
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293 } |
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294 catch (Exception e) { |
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295 logger.error(e.getLocalizedMessage(), e); |
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296 throw new ArtifactDatabaseException(CREATION_FAILED); |
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297 } |
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298 |
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299 CallContextImpl cc = new CallContextImpl( |
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300 persistentArtifact, CallContext.NOTHING, callMeta); |
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301 |
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302 try { |
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303 return artifact.describe(null, cc); |
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304 } |
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305 finally { |
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306 cc.postCall(); |
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307 } |
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308 } |
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309 |
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310 public Document describe(String identifier, Document data, CallMeta callMeta) |
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311 throws ArtifactDatabaseException |
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312 { |
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313 // TODO: Handle background tasks |
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314 PersistentArtifact artifact = backend.getArtifact(identifier); |
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315 |
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316 if (artifact == null) { |
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317 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT); |
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318 } |
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319 |
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320 CallContextImpl cc = new CallContextImpl( |
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321 artifact, CallContext.TOUCH, callMeta); |
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322 |
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323 try { |
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324 return artifact.getArtifact().describe(data, cc); |
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325 } |
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326 finally { |
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327 cc.postCall(); |
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328 } |
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329 } |
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330 |
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331 public Document advance(String identifier, Document target, CallMeta callMeta) |
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332 throws ArtifactDatabaseException |
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333 { |
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334 // TODO: Handle background tasks |
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335 PersistentArtifact artifact = backend.getArtifact(identifier); |
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336 |
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337 if (artifact == null) { |
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338 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT); |
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339 } |
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340 |
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341 CallContextImpl cc = new CallContextImpl( |
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342 artifact, CallContext.STORE, callMeta); |
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343 |
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344 try { |
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345 return artifact.getArtifact().advance(target, cc); |
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346 } |
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347 finally { |
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348 cc.postCall(); |
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349 } |
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350 } |
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351 |
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352 public Document feed(String identifier, Document data, CallMeta callMeta) |
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353 throws ArtifactDatabaseException |
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354 { |
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355 // TODO: Handle background tasks |
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356 PersistentArtifact artifact = backend.getArtifact(identifier); |
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357 |
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358 if (artifact == null) { |
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359 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT); |
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360 } |
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361 |
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362 CallContextImpl cc = new CallContextImpl( |
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363 artifact, CallContext.STORE, callMeta); |
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364 |
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365 try { |
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366 return artifact.getArtifact().feed(data, cc); |
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367 } |
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368 finally { |
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369 cc.postCall(); |
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370 } |
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371 } |
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372 |
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373 public DeferredOutput out(String identifier, Document format, CallMeta callMeta) |
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374 throws ArtifactDatabaseException |
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375 { |
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376 // TODO: Handle background tasks |
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377 PersistentArtifact artifact = backend.getArtifact(identifier); |
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378 |
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379 if (artifact == null) { |
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380 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT); |
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381 } |
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382 |
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383 return new DeferredOutputImpl(artifact, format, callMeta); |
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384 } |
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385 } |
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386 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |