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

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