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package eu.etaxonomy.taxeditor.editor.view.derivate.handler;
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import javax.inject.Named;
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import org.eclipse.e4.core.di.annotations.CanExecute;
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import org.eclipse.e4.core.di.annotations.Execute;
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import org.eclipse.e4.ui.model.application.ui.basic.MPart;
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import org.eclipse.e4.ui.model.application.ui.menu.MHandledMenuItem;
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import org.eclipse.e4.ui.services.IServiceConstants;
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import org.eclipse.jface.viewers.TreeNode;
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import eu.etaxonomy.cdm.api.facade.DerivedUnitFacadeCacheStrategy;
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import eu.etaxonomy.cdm.api.service.IOccurrenceService;
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import eu.etaxonomy.cdm.model.occurrence.DerivationEvent;
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import eu.etaxonomy.cdm.model.occurrence.DerivationEventType;
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import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;
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import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
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import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateView;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.store.CdmStore;
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public abstract class AbstractAddDerivativeHandler {
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@Execute
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public void execute(@Named(IServiceConstants.ACTIVE_SELECTION) TreeNode node, @Named(IServiceConstants.ACTIVE_PART) MPart part) {
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DerivateView derivateView = (DerivateView) part.getObject();
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checkDirtyState(derivateView);
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Object selectedDerivative = node.getValue();
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if(isAllowed(selectedDerivative)){
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Object createdElement = addElement(selectedDerivative);
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refreshView(derivateView, createdElement);
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}
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}
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@CanExecute
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public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION) TreeNode node, MHandledMenuItem item) {
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boolean canExecute = false;
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Object derivate = node.getValue();
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canExecute = isAllowed(derivate);
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item.setVisible(canExecute);
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return canExecute;
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}
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private void refreshView(DerivateView derivateView, Object createdElement) {
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if(derivateView!=null){
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derivateView.getConversationHolder().commit();
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derivateView.refreshTree(createdElement);
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}
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}
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private void checkDirtyState(DerivateView derivateView){
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if(derivateView!=null){
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if(derivateView.isDirty()){
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MessagingUtils.warningDialog(DerivateView.VIEW_HAS_UNSAVED_CHANGES, this, DerivateView.YOU_NEED_TO_SAVE_BEFORE_PERFORMING_THIS_ACTION);
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return;
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}
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}
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}
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protected Object addElement(Object selectedDerivative){
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Object createdElement = null;
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SpecimenOrObservationBase<?> specimenOrObservationBase = (SpecimenOrObservationBase<?>) selectedDerivative;
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DerivedUnit derivedUnit = createDerivative();
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specimenOrObservationBase.addDerivationEvent(DerivationEvent.NewSimpleInstance(specimenOrObservationBase, derivedUnit, getDerivationeType()));
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derivedUnit.setCacheStrategy(new DerivedUnitFacadeCacheStrategy());
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derivedUnit.getTitleCache(); //update title cache
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createdElement = derivedUnit;
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CdmStore.getService(IOccurrenceService.class).merge((SpecimenOrObservationBase<?>) selectedDerivative, true);
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return createdElement;
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}
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protected abstract DerivedUnit createDerivative();
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protected abstract DerivationEventType getDerivationeType();
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protected abstract boolean isAllowed(Object derivative);
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}
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