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 java.util.Collections; 020import java.util.Map; 021 022import org.springframework.core.MethodParameter; 023import org.springframework.core.ReactiveAdapterRegistry; 024import org.springframework.util.StringUtils; 025import org.springframework.web.bind.annotation.PathVariable; 026import org.springframework.web.reactive.BindingContext; 027import org.springframework.web.reactive.HandlerMapping; 028import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolverSupport; 029import org.springframework.web.reactive.result.method.SyncHandlerMethodArgumentResolver; 030import org.springframework.web.server.ServerWebExchange; 031 032/** 033 * Resolver for {@link Map} method arguments also annotated with 034 * {@link PathVariable @PathVariable} where the annotation does not specify a 035 * path variable name. The resulting {@link Map} argument is a coyp of all URI 036 * template name-value pairs. 037 * 038 * @author Rossen Stoyanchev 039 * @since 5.0 040 * @see PathVariableMethodArgumentResolver 041 */ 042public class PathVariableMapMethodArgumentResolver extends HandlerMethodArgumentResolverSupport 043 implements SyncHandlerMethodArgumentResolver { 044 045 public PathVariableMapMethodArgumentResolver(ReactiveAdapterRegistry adapterRegistry) { 046 super(adapterRegistry); 047 } 048 049 050 @Override 051 public boolean supportsParameter(MethodParameter parameter) { 052 return checkAnnotatedParamNoReactiveWrapper(parameter, PathVariable.class, this::allVariables); 053 } 054 055 private boolean allVariables(PathVariable pathVariable, Class<?> type) { 056 return (Map.class.isAssignableFrom(type) && !StringUtils.hasText(pathVariable.value())); 057 } 058 059 060 @Override 061 public Object resolveArgumentValue( 062 MethodParameter methodParameter, BindingContext context, ServerWebExchange exchange) { 063 064 String name = HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE; 065 return exchange.getAttributeOrDefault(name, Collections.emptyMap()); 066 } 067 068}