/*
 * This is eMonocot, a global online biodiversity information resource.
 *
 * Copyright © 2011–2015 The Board of Trustees of the Royal Botanic Gardens, Kew and The University of Oxford
 *
 * eMonocot is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * eMonocot 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 Affero General Public License for more details.
 *
 * The complete text of the GNU Affero General Public License is in the source repository as the file
 * ‘COPYING’.  It is also available from <http://www.gnu.org/licenses/>.
 */
package org.emonocot.model.convert;

import java.security.Principal;

import org.emonocot.api.UserService;
import org.emonocot.model.auth.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.convert.converter.Converter;

/**
 * @author jk00kg
 *
 */
public class PrincipalToUserConverter implements Converter<Principal, User> {

	UserService service;

	/**
	 * @param service the service to set
	 */
	@Autowired
	public void setService(UserService service) {
		this.service = service;
	}

	/* (non-Javadoc)
	 * @see org.springframework.core.convert.converter.Converter#convert(java.lang.Object)
	 */
	@Override
	public User convert(Principal source) {
		User user = service.find(source.getName());
		if(user != null) {
			return user;
		} else {
			throw new IllegalArgumentException("Unable to find a user with an identifier of " + source.getName());
		}
	}

}