/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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
 *
 *    https://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.springframework.security.access.vote

import groovy.transform.CompileStatic

import org.springframework.security.access.AccessDecisionVoter
import org.springframework.security.access.AccessDeniedException
import org.springframework.security.access.ConfigAttribute
import org.springframework.security.core.Authentication

@CompileStatic
class AffirmativeBased extends AbstractAccessDecisionManager {

	AffirmativeBased(List<AccessDecisionVoter> decisionVoters) {
		super(decisionVoters)
	}

	@Override
	void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes) {
		boolean granted = false
		int denyCount = 0
		for (def voter : decisionVoters) {
			if (object != null && !voter.supports(object.getClass())) {
				continue
			}
			int result = voter.vote(authentication, object, configAttributes)
			switch (result) {
				case AccessDecisionVoter.ACCESS_GRANTED:
					granted = true
					break
				case AccessDecisionVoter.ACCESS_DENIED:
					denyCount++
					break
			}
		}
		if (granted) {
			return
		}
		if (denyCount > 0) {
			throw new AccessDeniedException(
					messages.getMessage(
							'AbstractAccessDecisionManager.accessDenied',
							'Access is denied'
					)
			)
		}
		checkAllowIfAllAbstainDecisions()
	}
}
