Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java @ 147:76cc1a66a05f

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Implemented a FLYSArtifactCollection that will be used in this application now. flys-artifacts/trunk@1565 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 24 Mar 2011 18:47:07 +0000
parents
children 2649ada6b053
rev   line source
147
76cc1a66a05f Implemented a FLYSArtifactCollection that will be used in this application now.
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1 package de.intevation.flys.collections;
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2
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3 import java.util.Date;
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4
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5 import javax.xml.xpath.XPathConstants;
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6
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7 import org.apache.log4j.Logger;
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8
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9 import org.w3c.dom.Document;
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10 import org.w3c.dom.Element;
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11 import org.w3c.dom.Node;
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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.CollectionItem;
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17
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19
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20 import de.intevation.artifactdatabase.DefaultArtifactCollection;
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21 import de.intevation.artifactdatabase.Backend;
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22 import de.intevation.artifactdatabase.Backend.PersistentArtifact;
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23
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24
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25 /**
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26 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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27 */
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28 public class FLYSArtifactCollection extends DefaultArtifactCollection {
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29
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30 /** The logger used in this class.*/
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31 private static Logger log = Logger.getLogger(FLYSArtifactCollection.class);
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32
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33
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34 /** Constant XPath that points to the outputmodes of an artifact.*/
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35 public static final String XPATH_ARTIFACT_OUTPUTMODES =
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36 "/art:result/art:outputmodes";
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37
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38
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39 @Override
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40 public Document describe(CallContext context) {
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41 log.debug("FLYSArtifactCollection.describe: " + identifier);
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42
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43 Document doc = XMLUtils.newDocument();
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44
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45 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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46 doc,
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47 ArtifactNamespaceContext.NAMESPACE_URI,
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48 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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49
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50 Date creationTime = getCreationTime();
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51 String creation = creationTime != null
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52 ? Long.toString(creationTime.getTime())
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53 : "";
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54
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55 Element collection = ec.create("artifact-collection");
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56 Element artifacts = ec.create("artifacts");
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57
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58 ec.addAttr(collection, "name", getName(), true);
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59 ec.addAttr(collection, "uuid", identifier(), true);
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60 ec.addAttr(collection, "creation", creation, true);
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61
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62 collection.appendChild(artifacts);
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63 doc.appendChild(collection);
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64
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65 Document attribute = getAttribute();
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66 if (attribute != null) {
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67 Node child = attribute.getFirstChild();
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68 collection.appendChild(doc.importNode(child, true));
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69 }
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70
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71 Backend backend = Backend.getInstance();
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72 CollectionItem[] items = backend.listCollectionArtifacts(identifier());
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73
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74 for (CollectionItem item: items) {
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75 artifacts.appendChild(
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76 buildArtifactNode(item, backend, context, ec));
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77 }
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78
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79 return doc;
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80 }
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81
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82
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83 protected Element buildArtifactNode(
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84 CollectionItem item,
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85 Backend backend,
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86 CallContext context,
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87 XMLUtils.ElementCreator ec)
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88 {
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89 String uuid = item.getArtifactIdentifier();
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90
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91 log.debug("Append artifact '"+ uuid +"' to collection description");
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92
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93 Element ci = ec.create("artifact");
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94 ec.addAttr(ci, "uuid", uuid);
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95
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96 PersistentArtifact pArtifact = backend.getArtifact(uuid);
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97 Artifact artifact = pArtifact.getArtifact();
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98
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99 // XXX I am not sure if it works well every time with an empty document
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100 // in the describe operation of an artifact.
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101 Document description = artifact.describe(null, context);
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102 Node outputModes = (Node) XMLUtils.xpath(
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103 description,
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104 XPATH_ARTIFACT_OUTPUTMODES,
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105 XPathConstants.NODE,
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106 ArtifactNamespaceContext.INSTANCE);
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107
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108 if (outputModes != null) {
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109 Document doc = ci.getOwnerDocument();
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110 ci.appendChild(doc.importNode(outputModes, true));
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111 }
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112
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113 return ci;
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114 }
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115 }
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116 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org