/**
 * Adds to the list all perspective IDs in the Workbench who's original ID
 * matches the given ID.
 *
 * @param perspectiveIds
 *            the list of perspective IDs to supplement.
 * @param id
 *            the id to query.
 * @since 3.0
 */
private static void addPerspectiveAndDescendants(List perspectiveIds, String id) {
	IPerspectiveRegistry registry = PlatformUI.getWorkbench().getPerspectiveRegistry();
	IPerspectiveDescriptor[] perspectives = registry.getPerspectives();
	for (int i = 0; i < perspectives.length; i++) {
		// @issue illegal ref to workbench internal class;
		// consider adding getOriginalId() as API on IPerspectiveDescriptor
		PerspectiveDescriptor descriptor = ((PerspectiveDescriptor) perspectives[i]);
		if (descriptor.getOriginalId().equals(id)) {
			perspectiveIds.add(descriptor.getId());
		}
	}
}
 

static PerspectiveDescriptor getSimulationDescriptor() {
	return (PerspectiveDescriptor) getPerspectiveRegistry().findPerspectiveWithId(PERSPECTIVE_SIMULATION_ID);
}
 

@SuppressWarnings("restriction")
private IPerspectiveDescriptor importPerspectiveFromStream(InputStream in, IStateCallback iStateHandle,
	boolean openPerspectiveIfAdded) throws IOException{
	MPerspective mPerspective = loadPerspectiveFromStream(in);
	if (mPerspective != null) {
		IPerspectiveRegistry iPerspectiveRegistry =
			PlatformUI.getWorkbench().getPerspectiveRegistry();
		
		// the perspective id to import
		String id = mPerspective.getElementId();
		IPerspectiveDescriptor existingPerspectiveDescriptor =
			iPerspectiveRegistry.findPerspectiveWithId(id);
		
		// the active perspective id
		String activePerspectiveId = getActivePerspectiveId();
		
		// check if the import should be done
		if (existingPerspectiveDescriptor == null || iStateHandle == null
			|| iStateHandle.state(State.OVERRIDE)) {
			
			IPerspectiveDescriptor activePd =
				iPerspectiveRegistry.findPerspectiveWithId(activePerspectiveId);
			
			// delete if a perspective with the id already exists
			int idx = deletePerspective(id);
			
			// add the new perspective to the registry
			((PerspectiveRegistry) iPerspectiveRegistry).addPerspective(mPerspective);
			IPerspectiveDescriptor createdPd = iPerspectiveRegistry.findPerspectiveWithId(id);
			if (createdPd != null) {
				((PerspectiveDescriptor) createdPd).setHasCustomDefinition(false); //no original descriptor should exists 
			}
			// check if the new perspective should be opened
			if (idx > -1 || openPerspectiveIfAdded) {
				openPerspective(createdPd);
				// there was already an opened active perspective switch back to it
				openPerspective(activePd);
			}
			return createdPd;
		}
		
	}
	return null;
}
 

@SuppressWarnings("restriction")
@Override
public void savePerspectiveAs(String perspectiveId, String newName){
	EModelService modelService = getService(EModelService.class);
	MApplication mApplication = getService(MApplication.class);
	PerspectiveRegistry perspectiveRegistry =
		(PerspectiveRegistry) PlatformUI.getWorkbench().getPerspectiveRegistry();
	PerspectiveDescriptor existingPerspectiveDescriptor =
		(PerspectiveDescriptor) perspectiveRegistry.findPerspectiveWithId(perspectiveId);
	if (existingPerspectiveDescriptor != null) {
		
		int idx = isPerspectiveInsideStack(existingPerspectiveDescriptor);
		
		// loads the mapplication from the orginal descriptor
		openPerspective(existingPerspectiveDescriptor);
		
		// the model must be loaded
		List<MPerspective> modelPerspective = modelService.findElements(mApplication,
			existingPerspectiveDescriptor.getId(), MPerspective.class, null);
		
		// check if the model is loaded
		if (!modelPerspective.isEmpty()) {
			// create a new pd
			PerspectiveDescriptor newPd =
				perspectiveRegistry.createPerspective(newName, existingPerspectiveDescriptor);
			
			// saves an opens the new perspective
			PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
				.savePerspectiveAs(newPd);
			
			// close the new created one
			closePerspective(newPd);
			
			if (idx > -1) {
				// opens the original descriptor if it was already opened
				openPerspective(existingPerspectiveDescriptor);
			}
		}
		
	}
}