org.simantics.district.network.ui/src/org/simantics/district/network/ui/contributions/CopyDistrictVertexHandler.java

   1 package org.simantics.district.network.ui.contributions;
   2
   3 import java.util.List;
   4
   5 import javax.inject.Named;
   6
   7 import org.eclipse.e4.core.di.annotations.CanExecute;
   8 import org.eclipse.e4.core.di.annotations.Execute;
   9 import org.eclipse.e4.ui.services.IServiceConstants;
  10 import org.eclipse.jface.viewers.ISelection;
  11 import org.simantics.Simantics;
  12 import org.simantics.db.ReadGraph;
  13 import org.simantics.db.Resource;
  14 import org.simantics.db.exception.DatabaseException;
  15 import org.simantics.db.layer0.SelectionHints;
  16 import org.simantics.db.request.Read;
  17 import org.simantics.district.network.ontology.DistrictNetworkResource;
  18 import org.simantics.utils.ui.ISelectionUtils;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21
  22 public class CopyDistrictVertexHandler {
  23
  24     private static final Logger LOGGER = LoggerFactory.getLogger(CopyDistrictVertexHandler.class);
  25     static List<Resource> elements;
  26     static boolean cut = true;
  27
  28     @CanExecute
  29     public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION) ISelection selection) {
  30         List<Resource> elements = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  31         if (elements.size() != 1)
  32             return false;
  33         try {
  34             return Simantics.getSession().syncRequest(new Read<Boolean>() {
  35
  36                 @Override
  37                 public Boolean perform(ReadGraph graph) throws DatabaseException {
  38                     DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
  39                     for (Resource selection : elements) {
  40                         if (!graph.isInstanceOf(selection, DN.Element)) {
  41                             return false;
  42                         }
  43                     }
  44                     return true;
  45                 }
  46             });
  47         } catch (DatabaseException e) {
  48             LOGGER.error("Could not evaluate if mapping can be changed for selection {}", elements, e);
  49             return false;
  50         }
  51     }
  52
  53     @Execute
  54     public void execute(@Named(IServiceConstants.ACTIVE_SELECTION) Object selection) {
  55         final List<Resource> elements = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  56         // we store these to a static variable for pasting.. maybe not the best solution
  57         CopyDistrictVertexHandler.elements = elements;
  58         //CopyDistrictVertexHandler.cut = cut != null && !cut.isEmpty();
  59     }
  60 }