bundles/org.simantics.document.linking.ui/src/org/simantics/document/linking/ge/SourceObjectDropAction.java

   1 package org.simantics.document.linking.ge;
   2
   3 import org.eclipse.jface.dialogs.MessageDialog;
   4 import org.eclipse.swt.widgets.Display;
   5 import org.simantics.db.ReadGraph;
   6 import org.simantics.db.Resource;
   7 import org.simantics.db.WriteGraph;
   8 import org.simantics.db.common.request.WriteRequest;
   9 import org.simantics.db.common.utils.NameUtils;
  10 import org.simantics.db.exception.DatabaseException;
  11 import org.simantics.db.layer0.adapter.DropActionFactory;
  12 import org.simantics.db.layer0.variable.Variable;
  13 import org.simantics.document.linking.ontology.DocumentLink;
  14 import org.simantics.document.linking.utils.SourceLinkUtil;
  15 import org.simantics.layer0.Layer0;
  16 import org.simantics.ui.SimanticsUI;
  17 import org.simantics.utils.ui.AdaptionUtils;
  18
  19 public class SourceObjectDropAction implements DropActionFactory {
  20
  21
  22         @Override
  23         public Runnable create(ReadGraph g, Object target, Object source, int operation)
  24                         throws DatabaseException {
  25                 Variable t = (Variable)target;
  26         Resource s = AdaptionUtils.adaptToSingle(source, Resource.class);
  27         if (s == null) {
  28                 Variable sv = AdaptionUtils.adaptToSingle(source, Variable.class);
  29                 if (sv != null)
  30                         s = sv.getRepresents(g);
  31         }
  32
  33         if(t == null || s == null)
  34             return null;
  35         DocumentLink sl = DocumentLink.getInstance(g);
  36         if (g.isInstanceOf(s, sl.Source)) {
  37                 return null;
  38         }
  39                 return getRunnable(t, s);
  40         }
  41
  42         private Runnable getRunnable(final Variable tv, final Resource s) {
  43                 return new Runnable() {
  44
  45                         @Override
  46                         public void run() {
  47                                 SimanticsUI.getSession().asyncRequest(new WriteRequest() {
  48
  49                                         @Override
  50                                         public void perform(WriteGraph graph) throws DatabaseException {
  51                                                 Layer0 l0 = Layer0.getInstance(graph);
  52
  53                                                 Resource relation = tv.getPossiblePredicateResource(graph);
  54                                                 Resource instance;
  55                                                 if (relation != null && graph.isInstanceOf(relation, l0.FunctionalRelation)) {
  56                                                         instance = tv.getParent(graph).getPossibleRepresents(graph);
  57                                                 } else {
  58                                                         instance = tv.getPossibleRepresents(graph);
  59                                                 }
  60                                                 if (instance == null)
  61                                                         return;
  62
  63                                                 try {
  64                                                         SourceLinkUtil.createDocumentLink(graph, instance, relation, s);
  65                                                 } catch (final DatabaseException e) {
  66                                                         String l = NameUtils.getSafeLabel(graph, s);
  67                                                         if (l.length() == 0)
  68                                                                 l = NameUtils.getSafeName(graph, s);
  69                                                         final String label = l;
  70                                                         Display.getDefault().asyncExec(new Runnable() {
  71
  72                                                                 @Override
  73                                                                 public void run() {
  74                                                                         String dialogMessage = "Cannot create document link to \"" + label +"\":" + e.getMessage();
  75                                                                         MessageDialog dialog = new MessageDialog(Display.getCurrent().getActiveShell(), "Document Link", null, dialogMessage, MessageDialog.INFORMATION, new String[]{"OK"}, 0);
  76                                                                         dialog.open();
  77                                                                 }
  78                                                         });
  79                                                 }
  80                                         }
  81                                 });
  82
  83                         }
  84                 };
  85
  86         }
  87
  88
  89
  90
  91 }