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.core.commands.ParameterizedCommand;
   8 import org.eclipse.e4.core.di.annotations.CanExecute;
   9 import org.eclipse.e4.core.di.annotations.Execute;
  10 import org.eclipse.e4.ui.services.IServiceConstants;
  11 import org.eclipse.jface.viewers.ISelection;
  12 import org.simantics.Simantics;
  13 import org.simantics.db.ReadGraph;
  14 import org.simantics.db.Resource;
  15 import org.simantics.db.exception.DatabaseException;
  16 import org.simantics.db.layer0.SelectionHints;
  17 import org.simantics.db.request.Read;
  18 import org.simantics.district.network.ontology.DistrictNetworkResource;
  19 import org.simantics.utils.ui.ISelectionUtils;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 public class CopyDistrictVertexHandler {
  24
  25     private static final Logger LOGGER = LoggerFactory.getLogger(CopyDistrictVertexHandler.class);
  26     static List<Resource> elements;
  27     static boolean cut = true;
  28
  29     @CanExecute
  30     public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION) ISelection selection) {
  31         List<Resource> elements = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  32         if (elements.size() != 1)
  33             return false;
  34         try {
  35             return Simantics.getSession().syncRequest(new Read<Boolean>() {
  36
  37                 @Override
  38                 public Boolean perform(ReadGraph graph) throws DatabaseException {
  39                     DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
  40                     for (Resource selection : elements) {
  41                         if (!graph.isInstanceOf(selection, DN.Element)) {
  42                             return false;
  43                         }
  44                     }
  45                     return true;
  46                 }
  47             });
  48         } catch (DatabaseException e) {
  49             LOGGER.error("Could not evaluate if mapping can be changed for selection {}", elements, e);
  50             return false;
  51         }
  52     }
  53
  54     @Execute
  55     public void execute(@Named(IServiceConstants.ACTIVE_SELECTION) Object selection, ParameterizedCommand command) {
  56         final List<Resource> elements = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  57         // we store these to a static variable for pasting.. maybe not the best solution
  58         CopyDistrictVertexHandler.elements = elements;
  59         Object cut = command.getParameterMap().get("org.simantics.district.network.ui.commandparameter.0");
  60         CopyDistrictVertexHandler.cut = cut != null;
  61     }
  62 }