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Project that holds utility classes for the spring framework

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/**
 * The MIT License
 *
 * Copyright (C) 2015 Asterios Raptis
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package io.github.astrapi69.spring.security;

import java.util.Optional;

import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;

public class AuthenticationPrincipalResolver
{

	public static  Optional getAuthenticationPrincipal()
	{
		Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
		if (authentication == null)
		{
			return Optional.empty();
		}
		T principal = (T)authentication.getPrincipal();
		return Optional.of(principal);
	}


	public static  Optional getCurrentUser()
	{
		Optional> authenticationPrincipal = getAuthenticationPrincipal();
		if (!authenticationPrincipal.isPresent())
		{
			return Optional.empty();
		}
		GenericPrincipal usersPrincipal = authenticationPrincipal.get();
		return Optional.of(usersPrincipal.getUser());
	}
}