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package eu.etaxonomy.taxeditor.handler.defaultHandler.e4;
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import javax.inject.Named;
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import org.eclipse.e4.core.contexts.IEclipseContext;
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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.MApplication;
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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.e4.ui.workbench.modeling.EModelService;
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import org.eclipse.e4.ui.workbench.modeling.EPartService;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.swt.widgets.Shell;
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public abstract class DefaultOpenHandlerBaseE4 <T> {
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protected IEclipseContext context;
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protected MApplication application;
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protected EModelService modelService;
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@Execute
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public void execute(@Named(IServiceConstants.ACTIVE_SHELL)Shell shell, MHandledMenuItem menuItem,
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EModelService modelService, EPartService partService, MApplication application,
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IEclipseContext context) {
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this.context = context;
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this.modelService = modelService;
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this.application = application;
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String commandId = menuItem.getCommand().getElementId();
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Object transientData = menuItem.getTransientData().get(commandId+".uuid");
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// if(transientData instanceof UUID){
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// T entity = getEntity((UUID) transientData);
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open((T)((IStructuredSelection)transientData).getFirstElement(), shell, partService);
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// }
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}
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@CanExecute
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public boolean canExecute(MHandledMenuItem menuItem,
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@Named(IServiceConstants.ACTIVE_PART) MPart activePart) {
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boolean canExecute = false;
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//check if same part
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String partId = getPartId();
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//check for correct entity
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String commandId = menuItem.getCommand().getElementId();
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Object transientData = menuItem.getTransientData().get(commandId+".uuid");
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if(transientData instanceof IStructuredSelection){
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//TODO: is it necessary to get the entity? This handler is only available for the navigator and there are all objects are transient, this also needs several db calls, not necessary
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// T entity = getEntity((UUID) transientData);
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canExecute = canExecute((IStructuredSelection)transientData)
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&& (partId!=null?!partId.equals(activePart.getElementId()):true);
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}
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menuItem.setVisible(canExecute);
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return canExecute;
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}
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//protected abstract T getEntity(UUID uuid);
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protected abstract void open(T entity, Shell shell, EPartService partService);
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protected abstract boolean canExecute(IStructuredSelection entity);
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/**
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* Returns the part id for the part this handler opens.<br>
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*/
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protected String getPartId(){
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return null;
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}
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}
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