AcegiUtil.java

/*
 * Copyright 2006-2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jrecruiter.common;

import java.util.Arrays;
import java.util.Collection;

import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;

public final class AcegiUtil {

	private AcegiUtil() {
		// private utility class constructor
	}

	private static Authentication getAuthentication() {
		return SecurityContextHolder.getContext().getAuthentication();
	}

	public static boolean containsRole(final Collection<? extends GrantedAuthority> grantedAuthorities, final String role) {
		for (final GrantedAuthority grantedAuthority : grantedAuthorities)
			if (grantedAuthority.getAuthority().equals(role)) {
				return true;
			}
		return false;
	}

	public static boolean hasRole(final String role) {
		final Authentication authentication = getAuthentication();

		if (authentication == null) {
			return false;
		}

		return containsRole(authentication.getAuthorities(), role);
	}

	public static boolean hasAnyRole(final String... roles) {

		final Authentication authentication = getAuthentication();

		if (authentication == null) {
			throw new AccessDeniedException("User is not authenticated");
		}

		final Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();

		for (final String role : roles) {
			if (containsRole(authorities, role)) {
				return true;
			}
		}

		return false;
	}

	public static boolean hasAllRoles(final String... roles) {
		final Authentication authentication = getAuthentication();

		if (authentication == null) {
			throw new AccessDeniedException("User is not authenticated");
		}

		final Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();

		for (final String role : roles) {
			if (!containsRole(authorities, role)) {
				return false;
			}
		}
		return true;
	}

	public static void ensureAllRoles(final String... roles) {
		if (!hasAllRoles(roles)) {
			throw new AccessDeniedException("User has not all of these roles: " + Arrays.toString(roles));
		}
	}

	public static void ensureAnyRole(final String... roles) {
		if (!hasAnyRole(roles)) {
			throw new AccessDeniedException("User has none of these roles: " + Arrays.toString(roles));
		}
	}

}