EDIT

package eu.etaxonomy.vaadin.ui.navigation;

import java.util.Collection;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.Lazy;

import com.vaadin.navigator.View;

import com.vaadin.navigator.ViewChangeListener;

import com.vaadin.spring.annotation.SpringComponent;

import com.vaadin.spring.annotation.UIScope;

@SpringComponent

@UIScope

class ViewChangeListenerBean implements ViewChangeListener {

	private static final long serialVersionUID = 1913421359807383L;

	private Collection<ViewChangeAllowedVerifier> verifiers = null;

	@Autowired

	@Autowired

	@Override

	public boolean beforeViewChange(ViewChangeEvent event) {

		View currentView = navigationManager.getCurrentView();

				if (currentView.equals(verifier)) {

					if (!verifier.isViewChangeAllowed()) {

						return false;

					}

				}

			}

		}

		return true;

	}

	@Override

	public void afterViewChange(ViewChangeEvent event) {

}