net.solarnetwork.central.dras.support.UserRoleConstraintValidator.java Source code

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Here is the source code for net.solarnetwork.central.dras.support.UserRoleConstraintValidator.java

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/* ==================================================================
 * UserRoleConstraintValidator.java - Jun 11, 2011 2:27:40 PM
 * 
 * Copyright 2007-2011 SolarNetwork.net Dev Team
 * 
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of 
 * the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 
 * 02111-1307 USA
 * ==================================================================
 * $Id$
 * ==================================================================
 */

package net.solarnetwork.central.dras.support;

import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.Set;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

import net.solarnetwork.central.dras.biz.UserBiz;
import net.solarnetwork.central.dras.dao.UserDao;
import net.solarnetwork.central.dras.domain.UserRole;

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

/**
 * Validate a set of role IDs against the available roles returned by
 * {@link UserDao#getAllUserRoles()}.
 * 
 * @author matt
 * @version $Revision$
 */
public class UserRoleConstraintValidator implements ConstraintValidator<ValidUserRole, Collection<String>> {

    @Autowired
    private UserBiz userBiz;
    private Set<String> validRoles;

    @Override
    public void initialize(ValidUserRole constraint) {
        if (validRoles == null) {
            validRoles = new LinkedHashSet<String>(10);
            Set<UserRole> availableRoles = userBiz.getAllUserRoles();
            for (UserRole role : availableRoles) {
                validRoles.add(role.getId());
            }
        }
    }

    @Override
    public boolean isValid(Collection<String> roles, ConstraintValidatorContext context) {
        if (roles == null) {
            return true;
        }
        for (String role : roles) {
            if (!validRoles.contains(role)) {
                context.buildConstraintViolationWithTemplate("invalid role").addConstraintViolation();
            }
        }
        return false;
    }

}