bundles/org.simantics.document.ui/src/org/simantics/document/ui/contribution/NameInputValidator.java

   1 package org.simantics.document.ui.contribution;
   2
   3 import java.util.Collection;
   4
   5 import org.eclipse.jface.dialogs.IInputValidator;
   6 import org.simantics.Simantics;
   7 import org.simantics.browsing.ui.swt.widgets.impl.Widget;
   8 import org.simantics.db.ReadGraph;
   9 import org.simantics.db.Resource;
  10 import org.simantics.db.exception.DatabaseException;
  11 import org.simantics.db.management.ISessionContext;
  12 import org.simantics.db.request.Read;
  13 import org.simantics.layer0.Layer0;
  14 import org.simantics.utils.ui.AdaptionUtils;
  15
  16 public class NameInputValidator implements IInputValidator, Widget {
  17
  18         private Resource selection;
  19
  20         @Override
  21         public String isValid(final String newText) {
  22                 if (newText == null || newText.length() == 0)
  23                         return "Empty name is not allowed";
  24                 if (selection != null) {
  25                         try {
  26                                 return Simantics.getSession().syncRequest(new Read<String>() {
  27                                         @Override
  28                                         public String perform(ReadGraph graph) throws DatabaseException {
  29                                                 Layer0 l0 = Layer0.getInstance(graph);
  30                                                 Resource lib = graph.getPossibleObject(selection, l0.PartOf);
  31                                                 if (lib == null)
  32                                                         return null;
  33                                                 Collection<Resource> resources = graph.getObjects(lib, l0.ConsistsOf);
  34                                                 for (Resource resource : resources) {
  35                                                         if (resource.equals(selection))
  36                                                                 continue;
  37                                                         String n = graph.getPossibleRelatedValue(resource, l0.HasName);
  38                                                         if (newText.equals(n))
  39                                                                 return "Cannot have duplicate name " + newText;
  40                                                 }
  41                                                 return null;
  42                                         }
  43                                 });
  44                         } catch (DatabaseException e) {
  45                                 return e.getMessage();
  46                         }
  47                 }
  48                 return null;
  49         }
  50
  51         @Override
  52         public void setInput(ISessionContext context, Object input) {
  53                 selection = AdaptionUtils.adaptToSingle(input, Resource.class);
  54
  55         }
  56
  57 }