LMS-1230 bugfix: Calculated column disappears in Sample Search Grid

SVN: 12992

openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/sample/SampleSearchHitGrid.java

@@ -35,6 +35,7 @@ import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.search.
 import ch.systemsx.cisd.openbis.generic.client.web.client.dto.ListSampleDisplayCriteria;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DetailedSearchCriteria;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.EntityKind;
+import ch.systemsx.cisd.openbis.generic.shared.basic.dto.EntityType;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.PropertyType;
 
 /**
@@ -130,4 +131,10 @@ public class SampleSearchHitGrid extends SampleBrowserGrid implements IDetailedS
         return getCriteriaProvider().tryGetCriteria();
     }
 
+    @Override
+    protected EntityType tryToGetEntityType()
+    {
+        return null;
+    }
+
 }