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.IDialogConstants;
   4 import org.eclipse.jface.dialogs.MessageDialog;
   5 import org.eclipse.osgi.util.NLS;
   6 import org.eclipse.swt.widgets.Display;
   7 import org.simantics.Simantics;
   8 import org.simantics.db.ReadGraph;
   9 import org.simantics.db.Resource;
  10 import org.simantics.db.WriteGraph;
  11 import org.simantics.db.common.request.WriteRequest;
  12 import org.simantics.db.common.utils.NameUtils;
  13 import org.simantics.db.exception.DatabaseException;
  14 import org.simantics.db.layer0.adapter.DropActionFactory;
  15 import org.simantics.db.layer0.variable.Variable;
  16 import org.simantics.document.linking.ontology.DocumentLink;
  17 import org.simantics.document.linking.utils.SourceLinkUtil;
  18 import org.simantics.layer0.Layer0;
  19 import org.simantics.utils.ui.AdaptionUtils;
  20
  21 public class SourceObjectDropAction implements DropActionFactory {
  22
  23
  24         @Override
  25         public Runnable create(ReadGraph g, Object target, Object source, int operation)
  26                         throws DatabaseException {
  27                 Variable t = (Variable)target;
  28         Resource s = AdaptionUtils.adaptToSingle(source, Resource.class);
  29         if (s == null) {
  30                 Variable sv = AdaptionUtils.adaptToSingle(source, Variable.class);
  31                 if (sv != null)
  32                         s = sv.getRepresents(g);
  33         }
  34
  35         if(t == null || s == null)
  36             return null;
  37         DocumentLink sl = DocumentLink.getInstance(g);
  38         if (g.isInstanceOf(s, sl.Source)) {
  39                 return null;
  40         }
  41                 return getRunnable(t, s);
  42         }
  43
  44         private Runnable getRunnable(final Variable tv, final Resource s) {
  45                 return new Runnable() {
  46
  47                         @Override
  48                         public void run() {
  49                                 Simantics.getSession().asyncRequest(new WriteRequest() {
  50
  51                                         @Override
  52                                         public void perform(WriteGraph graph) throws DatabaseException {
  53                                                 Layer0 l0 = Layer0.getInstance(graph);
  54
  55                                                 Resource relation = tv.getPossiblePredicateResource(graph);
  56                                                 Resource instance;
  57                                                 if (relation != null && graph.isInstanceOf(relation, l0.FunctionalRelation)) {
  58                                                         instance = tv.getParent(graph).getPossibleRepresents(graph);
  59                                                 } else {
  60                                                         instance = tv.getPossibleRepresents(graph);
  61                                                 }
  62                                                 if (instance == null)
  63                                                         return;
  64
  65                                                 try {
  66                                                         SourceLinkUtil.createDocumentLink(graph, instance, relation, s);
  67                                                 } catch (final DatabaseException e) {
  68                                                         String l = NameUtils.getSafeLabel(graph, s);
  69                                                         if (l.length() == 0)
  70                                                                 l = NameUtils.getSafeName(graph, s);
  71                                                         final String label = l;
  72                                                         Display.getDefault().asyncExec(new Runnable() {
  73
  74                                                                 @Override
  75                                                                 public void run() {
  76                                                                         String dialogMessage = NLS.bind(Messages.SourceObjectDropAction_CannotCreateDocumentLink , new Object[] { label , e.getMessage() });
  77                                                                         MessageDialog dialog = new MessageDialog(Display.getCurrent().getActiveShell(), Messages.SourceObjectDropAction_DocumentLink, null, dialogMessage, MessageDialog.INFORMATION, new String[]{ IDialogConstants.OK_LABEL }, 0);
  78                                                                         dialog.open();
  79                                                                 }
  80                                                         });
  81                                                 }
  82                                         }
  83                                 });
  84
  85                         }
  86                 };
  87
  88         }
  89
  90
  91
  92
  93 }