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

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