EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.permission;

import java.io.Serializable;

import org.apache.logging.log4j.LogManager;

import org.apache.logging.log4j.Logger;

import com.vaadin.navigator.View;

import com.vaadin.spring.access.ViewInstanceAccessControl;

import com.vaadin.ui.UI;

/**

 * Denies, allows access to view by evaluating the {@link AccessRestrictedView#isAccessDenied()} flag.

 *

 * @author a.kohlbecker

 */

public class AccessRestrictedViewControlBean implements ViewInstanceAccessControl, Serializable {

    private static final long serialVersionUID = -5192116600545639108L;

    private final static Logger logger = LogManager.getLogger();

    @Override

    public boolean isAccessGranted(UI ui, String beanName, View view) {

        if(AccessRestrictedView.class.isAssignableFrom(view.getClass())){

            AccessRestrictedView restricedView = (AccessRestrictedView)view;

            if(logger.isDebugEnabled()){

                logger.debug("Access to view " + view.getClass().getSimpleName() + (restricedView.isAccessDenied() ? " denied": " allowed"));

            }

            return !restricedView.isAccessDenied();

        }

        logger.debug("allowing view by fall through, no check performed");

        return true;

    }

}