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}