001/*
002 * Copyright 2002-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.web.reactive.result.method.annotation;
018
019import org.springframework.core.MethodParameter;
020import org.springframework.lang.Nullable;
021import org.springframework.util.Assert;
022import org.springframework.web.bind.support.SessionStatus;
023import org.springframework.web.reactive.BindingContext;
024import org.springframework.web.reactive.result.method.SyncHandlerMethodArgumentResolver;
025import org.springframework.web.server.ServerWebExchange;
026
027/**
028 * Resolver for a {@link SessionStatus} argument obtaining it from the
029 * {@link BindingContext}.
030 *
031 * @author Rossen Stoyanchev
032 * @since 5.0
033 */
034public class SessionStatusMethodArgumentResolver implements SyncHandlerMethodArgumentResolver {
035
036        @Override
037        public boolean supportsParameter(MethodParameter parameter) {
038                return SessionStatus.class == parameter.getParameterType();
039        }
040
041        @Nullable
042        @Override
043        public Object resolveArgumentValue(
044                        MethodParameter parameter, BindingContext bindingContext, ServerWebExchange exchange) {
045
046                Assert.isInstanceOf(InitBinderBindingContext.class, bindingContext);
047                return ((InitBinderBindingContext) bindingContext).getSessionStatus();
048        }
049
050}