Open Registered EPackage Dialog

[chqu1012]

Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
RegisteredPackageDialog registeredPackageDialog = new RegisteredPackageDialog(shell) {
@OverRide
protected void setListElements(Object[] elements) {
if (elements == null)
return;
List pckUris = new LinkedList();
for (Object element : elements) {
if (!getProjectInfo().getFilterSystemEPackages() || !ePackageUriFilter.apply(element.toString()))
pckUris.add(element.toString());
}
super.setListElements(pckUris.toArray());
}
};
registeredPackageDialog.setMultipleSelection(false);
registeredPackageDialog.open();
Object[] result = registeredPackageDialog.getResult();
if (result != null) {
List<?> nsURIs = Arrays.asList(result);
setNsURIs(nsURIs, txtUri, registeredPackageDialog.isDevelopmentTimeVersion(), false);
}

[chqu1012]

Another solution: https://www.programcreek.com/java-api-examples/?code=abelgomez/emf.utils/emf.utils-master/io.github.abelgomez.emf.utils.ui/src/io/github/abelgomez/emf/utils/ui/views/PackageRegistryView.java

	registerAction = new Action() {
		public void run() {
			ResourceDialog dialog = new EcoreResourceDialog(shell, "Select an Ecore Resource", SWT.OPEN | SWT.MULTI);
			if (dialog.open() == ResourceDialog.OK) {
				for (URI uri : dialog.getURIs()) {
					try {
						EPackage ePackage = EMFUtilsPlugin.getDefault().getRegistryManager().loadEPackage(uri);
						EMFUtilsPlugin.getDefault().getRegistryManager().registerEPackage(ePackage, true);
					} catch (Exception e) {
						EMFUtilsUiPlugin.getDefault().getLog().log(ExceptionStatus.createExceptionStatus(e));	
					}
				}
		 	}
		}
	};
	registerAction.setText("Register");
	registerAction.setToolTipText("Adds a new EPackage to the EMF EPackages registry");
	registerAction.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
			getImageDescriptor(ISharedImages.IMG_OBJ_ADD));

	unregisterAction = new Action() {
		public void run() {
			ISelection selection = viewer.getSelection();
			if (!selection.isEmpty()) {
				Iterator<?> it = ((IStructuredSelection) selection).iterator();
				while (it.hasNext()) {
					Entry<?, ?> obj = (Entry<?, ?>) it.next();
					try {
						URI nsUri = URI.createURI((String) obj.getKey());
						EPackage ePackage = EMFUtilsPlugin.getDefault().getRegistryManager().getEPackage(nsUri);
						EMFUtilsPlugin.getDefault().getRegistryManager().unregisterEPackage(ePackage);
					} catch (Exception e) {
						EMFUtilsUiPlugin.getDefault().getLog().log(ExceptionStatus.createExceptionStatus(e));	
					}
				}
			}
		}
	};
	unregisterAction.setText("Unregister");
	unregisterAction.setToolTipText("Deletes the entry from the EMF EPackages registry");
	unregisterAction.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
			getImageDescriptor(ISharedImages.IMG_ELCL_REMOVE));