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/**
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* Copyright (C) 2017 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.vaadin.permission;
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import java.io.Serializable;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import org.springframework.security.authentication.AnonymousAuthenticationToken;
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import org.springframework.security.core.Authentication;
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import org.springframework.security.core.context.SecurityContext;
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import org.springframework.security.core.context.SecurityContextHolder;
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import com.vaadin.navigator.View;
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import com.vaadin.spring.access.ViewInstanceAccessControl;
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import com.vaadin.ui.UI;
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/**
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* @author a.kohlbecker
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* @since Apr 24, 2017
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*
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*
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* (FIMXE 1. consider renaming this class and its interface, since it is no longer annotation based!!!!)
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*
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* FIMXE 2. this class should implement ViewAccessControl. The view class and annotations can be accessed
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* via the application context before the view bean has been created. see #7967
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*/
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public class AnnotationBasedAccessControlBean implements ViewInstanceAccessControl, Serializable {
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private static final long serialVersionUID = -4232241572782673248L;
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private final static Logger logger = LogManager.getLogger();
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@Override
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public boolean isAccessGranted(UI ui, String beanName, View view) {
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// if(view.getClass().isAnnotationPresent(RequireAuthentication.class)){
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// return currentSecurityContext().getAuthentication().isAuthenticated();
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// }
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// no RequireAuthentication annotation => grant access
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Class<? extends View> viewClass = view.getClass();
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if(AccessRestrictedView.class.isAssignableFrom(viewClass)){
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AccessRestrictedView restricedView = (AccessRestrictedView)view;
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if(restricedView.allowAnonymousAccess()){
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if(logger.isTraceEnabled()){
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logger.trace("anonymous access to " + viewClass.getName() + " allowed");
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}
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return true;
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} else {
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Authentication authentication = currentSecurityContext().getAuthentication();
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if(authentication != null && authentication.isAuthenticated() && !(authentication instanceof AnonymousAuthenticationToken)) {
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if(logger.isTraceEnabled()){
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logger.trace("allowing authenticated user " + authentication.getName() + " to access " + viewClass.getName() );
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}
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return true;
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}
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if(logger.isTraceEnabled()){
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logger.trace("denying access to " + viewClass.getName());
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}
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restricedView.releaseResourcesOnAccessDenied();
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return false;
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// FIMXE implement further checks
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// TODO use the UserHelperBean?
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}
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}
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return true;
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}
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/**
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* @return
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*
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* FIXME is it ok to use the SecurityContextHolder or do we need to hold the context in the vaadin session?
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*/
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private SecurityContext currentSecurityContext() {
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return SecurityContextHolder.getContext();
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}
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}
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