EDIT

package eu.etaxonomy.taxeditor.editor.view.derivate.handler;

import java.util.Collections;

import java.util.UUID;

import org.eclipse.core.commands.ExecutionEvent;

import org.eclipse.ui.PartInitException;

import eu.etaxonomy.cdm.api.service.IDescriptionService;

import eu.etaxonomy.cdm.model.description.DescriptionElementBase;

import eu.etaxonomy.cdm.model.description.IndividualsAssociation;

import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.handler.OpenDerivateViewHandler;

import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateViewEditorInput;

import eu.etaxonomy.taxeditor.handler.defaultHandler.DefaultOpenHandlerBase;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.store.CdmStore;

public class OpenDerivativeEditorForDescriptionElement extends DefaultOpenHandlerBase<IndividualsAssociation> {

    @Override

    protected IndividualsAssociation getEntity(UUID uuid) {

        DescriptionElementBase descriptionElement = CdmStore.getService(IDescriptionService.class).loadDescriptionElement(uuid, null);

        if(descriptionElement.isInstanceOf(IndividualsAssociation.class)){

            return (IndividualsAssociation) descriptionElement;

        }

        return null;

    }

    @Override

    protected void open(ExecutionEvent event, IndividualsAssociation entity) {

        SpecimenOrObservationBase associatedSpecimenOrObservation = entity.getAssociatedSpecimenOrObservation();

        if(associatedSpecimenOrObservation!=null){

            UUID specimenUuid = associatedSpecimenOrObservation.getUuid();

            try {

                EditorUtil.open(new DerivateViewEditorInput(Collections.singletonList(specimenUuid)));

            } catch (PartInitException e) {

                MessagingUtils.error(OpenDerivateViewHandler.class, "Derivative Editor could not be opened", e);

            }

        }

    }

}