Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java @ 106:5864c41219db
Initializes a TransitionEngine storing all transitions for each artifact at the application start.
flys-artifacts/trunk@1288 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 03 Feb 2011 10:23:30 +0000 |
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children | a228b39494a9 |
rev | line source |
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5864c41219db
Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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1 package de.intevation.flys.artifacts.context; |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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2 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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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.List; |
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6 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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7 import javax.xml.xpath.XPathConstants; |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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8 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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9 import org.apache.log4j.Logger; |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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10 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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11 import org.w3c.dom.Document; |
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12 import org.w3c.dom.Element; |
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13 import org.w3c.dom.NodeList; |
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14 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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15 import de.intevation.artifacts.ArtifactContextFactory; |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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16 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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17 import de.intevation.artifacts.common.utils.XMLUtils; |
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18 |
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19 import de.intevation.artifactdatabase.Config; |
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20 |
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21 import de.intevation.flys.artifacts.transitions.Transition; |
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22 import de.intevation.flys.artifacts.transitions.TransitionEngine; |
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23 import de.intevation.flys.artifacts.transitions.TransitionFactory; |
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24 |
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25 |
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26 /** |
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27 * The ArtifactContextFactory is used to initialize basic components and put |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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28 * them into the global context of the application. |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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29 * |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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30 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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31 */ |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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32 public class FLYSContextFactory implements ArtifactContextFactory { |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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33 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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34 /** The logger that is used in this class */ |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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35 private static Logger logger = Logger.getLogger(FLYSContextFactory.class); |
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36 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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37 /** The XPath to the artifacts configured in the configuration. */ |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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38 public static final String XPATH_ARTIFACTS = |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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39 "/artifact-database/artifacts/artifact"; |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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40 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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41 /** The XPath to the name of the artifact. */ |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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42 public static final String XPATH_ARTIFACT_NAME = "@name"; |
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43 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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44 /** The XPath to the xlink ref in an artifact configuration. */ |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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45 public static final String XPATH_XLINK = "xlink:href"; |
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46 |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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47 /** The XPath to the transitions configured in the artifact config. */ |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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48 public static final String XPATH_TRANSITIONS = |
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49 "/artifact/states/transition"; |
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50 |
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51 /** |
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52 * Creates a new FLYSArtifactContext object and initialize all |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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53 * components required by the application. |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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54 * |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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55 * @param config The artifact server configuration. |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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56 * @return a FLYSArtifactContext. |
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57 */ |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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58 public Object createArtifactContext(Document config) { |
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59 FLYSContext context = new FLYSContext(config); |
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60 |
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61 configureTransitions(config, context); |
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62 |
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63 return context; |
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64 } |
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65 |
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66 |
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67 /** |
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68 * This method initializes the transition configuration. |
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69 * |
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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70 * @param config the config document. |
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71 * @param context the FLYSContext. |
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72 */ |
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73 protected void configureTransitions(Document config, FLYSContext context) { |
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74 TransitionEngine engine = new TransitionEngine(); |
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75 |
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76 Document[] artifacts = getArtifactConfigurations(config); |
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77 logger.info("Found " + artifacts.length + " artifacts in the config."); |
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78 |
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79 for (Document doc: artifacts) { |
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80 List<Transition> transitions = new ArrayList<Transition>(); |
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81 |
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82 String artName = (String) XMLUtils.xpath( |
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83 doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING); |
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84 |
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85 NodeList transitionList = (NodeList) XMLUtils.xpath( |
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86 doc, XPATH_TRANSITIONS, XPathConstants.NODESET); |
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87 |
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88 if (transitionList == null) { |
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89 logger.warn("The artifact has no transitions configured."); |
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90 return; |
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91 } |
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92 |
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93 int trans = transitionList.getLength(); |
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94 |
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95 logger.info( |
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96 "Artifact '" + artName + "' has " + trans + " transitions."); |
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97 |
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98 for (int i = 0; i < trans; i++) { |
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99 transitions.add(TransitionFactory.createTransition( |
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100 transitionList.item(i))); |
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101 } |
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102 |
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103 engine.addTransition(artName, transitions); |
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104 } |
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105 |
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106 context.put(FLYSContext.TRANSITION_ENGINE_KEY, engine); |
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107 } |
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108 |
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109 |
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110 /** |
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111 * This method returns all artifact documents defined in |
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112 * <code>config</code>. <br>NOTE: The artifact configurations need to be |
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113 * stored in own files referenced by an xlink. |
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114 * |
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115 * @param config The global configuration. |
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116 * |
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117 * @return an array of Artifact configurations. |
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118 */ |
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119 protected Document[] getArtifactConfigurations(Document config) { |
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120 NodeList artifacts = (NodeList) XMLUtils.xpath( |
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121 config, XPATH_ARTIFACTS, XPathConstants.NODESET); |
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122 |
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123 int count = artifacts.getLength(); |
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124 |
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125 Document[] artifactDocs = new Document[count]; |
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126 |
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127 for (int i = 0; i < count; i++) { |
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128 Element tmp = (Element) artifacts.item(i); |
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129 |
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130 String xlink = tmp.getAttribute(XPATH_XLINK); |
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131 xlink = Config.replaceConfigDir(xlink); |
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132 |
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133 File artifactFile = new File(xlink); |
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134 artifactDocs[i] = XMLUtils.parseDocument(artifactFile); |
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135 } |
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136 |
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137 return artifactDocs; |
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138 } |
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139 } |
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140 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |