--- /dev/null
+package eu.etaxonomy.taxeditor.editor.view.derivate.handler;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.UUID;
+
+import org.eclipse.e4.ui.workbench.modeling.EPartService;
+import org.eclipse.swt.widgets.Shell;
+
+import eu.etaxonomy.cdm.api.service.IEventBaseService;
+import eu.etaxonomy.cdm.api.service.IOccurrenceService;
+import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
+import eu.etaxonomy.cdm.model.common.ICdmBase;
+import eu.etaxonomy.cdm.model.occurrence.FieldUnit;
+import eu.etaxonomy.cdm.model.occurrence.GatheringEvent;
+import eu.etaxonomy.taxeditor.editor.EditorUtil;
+import eu.etaxonomy.taxeditor.editor.l10n.Messages;
+import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateViewEditorInput;
+import eu.etaxonomy.taxeditor.handler.defaultHandler.e4.DefaultOpenHandlerBaseE4;
+import eu.etaxonomy.taxeditor.store.CdmStore;
+
+public class OpenDerivativeEditorForGatheringEvent extends DefaultOpenHandlerBaseE4<GatheringEvent> {
+
+ protected static final String OPEN_DERIVATIVE_EDITOR_FOR_TAXON_NODE_COULD_NOT_OPEN = Messages.OpenDerivativeEditorForTaxonNode_COULD_NOT_OPEN;
+
+ @Override
+ protected GatheringEvent getEntity(UUID uuid) {
+ ICdmBase load = CdmStore.getService(IEventBaseService.class).load(uuid);
+ return HibernateProxyHelper.deproxy(load, GatheringEvent.class );
+ }
+
+ @Override
+ protected void open(GatheringEvent entity, Shell shell, EPartService partService) {
+ Collection<UUID> specimenUuids = new ArrayList<UUID>();
+ List<FieldUnit> fieldUnits = CdmStore.getService(IOccurrenceService.class).getFieldUnitsForGatheringEvent(entity.getUuid());
+ fieldUnits.forEach(fieldUnit->specimenUuids.add(fieldUnit.getUuid()));
+ DerivateViewEditorInput input = new DerivateViewEditorInput(specimenUuids);
+ EditorUtil.openSpecimenEditor(input, modelService, partService, application);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ protected boolean canExecute(GatheringEvent entity) {
+ return true;
+ }
+
+}