/*
 *  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.method

import java.lang.reflect.Method

import groovy.transform.CompileStatic

import org.springframework.security.access.ConfigAttribute
import org.springframework.util.ClassUtils

@CompileStatic
abstract class AbstractFallbackMethodSecurityMetadataSource extends AbstractMethodSecurityMetadataSource {

	@Override
	Collection<ConfigAttribute> getAttributes(Method method, Class<?> targetClass) {
		def specificMethod = targetClass == null ?
				method :
				ClassUtils.getMostSpecificMethod(method, targetClass)

		def attributes = findAttributes(specificMethod, targetClass)
		if (attributes != null) {
			return attributes
		}

		def declaringClass = specificMethod?.declaringClass
		if (declaringClass != null) {
			attributes = findAttributes(declaringClass)
			if (attributes != null) {
				return attributes
			}
		}

		if (specificMethod != method) {
			attributes = findAttributes(method, method?.declaringClass)
			if (attributes != null) {
				return attributes
			}

			declaringClass = method?.declaringClass
			if (declaringClass != null) {
				attributes = findAttributes(declaringClass)
				if (attributes != null) {
					return attributes
				}
			}
		}

		if (targetClass != null) {
			return findAttributes(targetClass)
		}
		null
	}

	protected abstract Collection<ConfigAttribute> findAttributes(Class<?> clazz)

	protected abstract Collection<ConfigAttribute> findAttributes(Method method, Class<?> targetClass)
}
