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annotate gnv/src/main/java/de/intevation/gnv/action/PreviousArtifactStepAction.java @ 394:14eecfde4607

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Render links to step back to previous states into gui. Added controller to advance back to these states. gnv/trunk@538 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 13 Jan 2010 22:17:02 +0000
parents
children 8330c1dbab34
rev   line source
394
14eecfde4607 Render links to step back to previous states into gui. Added controller to advance back to these states.
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1 package de.intevation.gnv.action;
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2
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3 import java.util.ArrayList;
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4 import java.util.Collection;
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5 import java.util.Iterator;
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6 import java.util.Enumeration;
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7
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8 import javax.servlet.http.HttpServletRequest;
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9 import javax.servlet.http.HttpServletResponse;
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10
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11 import javax.xml.xpath.XPathConstants;
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12
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13 import org.apache.log4j.Logger;
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14 import org.apache.struts.action.ActionForm;
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15 import org.apache.struts.action.ActionForward;
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16 import org.apache.struts.action.ActionMapping;
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17 import org.w3c.dom.Node;
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18
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19 import de.intevation.gnv.action.sessionmodel.SessionModel;
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20 import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
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21 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
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22 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
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23 import de.intevation.gnv.artifactdatabase.objects.ArtifactDescription;
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24 import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
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25 import de.intevation.gnv.artifactdatabase.objects.ArtifactStatisticsSet;
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26 import de.intevation.gnv.artifactdatabase.objects.DefaultInputParameter;
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27 import de.intevation.gnv.artifactdatabase.objects.InputParameter;
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28 import de.intevation.gnv.util.ArtifactNamespaceContext;
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29 import de.intevation.gnv.util.XMLUtils;
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30 import de.intevation.gnv.util.XSLTransformer;
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31
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32 /**
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33 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
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34 *
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35 */
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36 public class PreviousArtifactStepAction extends ArtifactDatabaseActionBase {
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37
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38 public static final String XPATH_DYNAMIC_UI = "art:dynamic";
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39 public static final String XPATH_STATIC_UI = "art:static";
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40
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41 public static final String URL_STATE_KEY = "target";
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42
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43 private static Logger logger =
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44 Logger.getLogger(PreviousArtifactStepAction.class);
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45
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46
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47 public PreviousArtifactStepAction() {
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48 super();
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49 }
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50
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51
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52 @Override
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53 public ActionForward execute(
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54 ActionMapping mapping,
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55 ActionForm form,
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56 HttpServletRequest request,
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57 HttpServletResponse response
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58 ) throws Exception {
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59
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60 String id = request.getSession().getId();
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61
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62 SessionModel session =
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63 SessionModelFactory.getInstance().getSessionModel(request);
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64
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65 // TODO check if target is reachable
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66
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67 ArtifactDatabaseClientFactory f =
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68 ArtifactDatabaseClientFactory.getInstance();
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69 ArtifactDatabaseClient client =
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70 f.getArtifactDatabaseClient(getLocale(request));
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71
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72 ArtifactObject artifactFactory = session.getSelectedArtifactFactory();
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73 ArtifactObject currentArtifact = session.getCurrentArtifact();
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74
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75 String target = (String) request.getParameter(URL_STATE_KEY);
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76 logger.debug("Step back to previous state: " + target);
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77
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78 client.doAdvance(
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79 artifactFactory,
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80 currentArtifact,
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81 target
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82 );
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83
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84 ArtifactDescription description = client.getCurrentStepDescription(
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85 artifactFactory,
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86 currentArtifact,
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87 true
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88 );
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89
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90 Node currentUI = description.getCurrentUI();
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91 if (currentUI != null) {
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92 XSLTransformer transformer = new XSLTransformer();
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93 Node dynamicNode = (Node) XMLUtils.xpath(
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94 currentUI,
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95 XPATH_DYNAMIC_UI,
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96 XPathConstants.NODE,
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97 ArtifactNamespaceContext.INSTANCE
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98 );
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99
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100 if (dynamicNode != null) {
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101 String dynamicUI = transformer.transform(
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102 dynamicNode, "UTF-8", request.getRealPath(
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103 "WEB-INF/config/templates/describe-ui.xsl")
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104 );
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105 request.setAttribute("ui", dynamicUI);
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106 }
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107
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108 Node staticNode = (Node) XMLUtils.xpath(
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109 currentUI,
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110 XPATH_STATIC_UI,
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111 XPathConstants.NODE,
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112 ArtifactNamespaceContext.INSTANCE
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113 );
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114
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115 if (staticNode != null){
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116 String staticUI = transformer.transform(
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117 staticNode, "UTF-8", request.getRealPath(
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118 "WEB-INF/config/templates/describe-ui-static.xsl")
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119 );
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120 request.setAttribute("staticui", staticUI);
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121 }
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122 }
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123
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124 return super.execute(mapping, form, request, response);
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125 }
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126 }
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