/* * Copyright 2002-2018 the original author or authors. * * Licensed 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 * * http://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.web.reactive.result.method.annotation; import java.util.Map; import org.springframework.core.MethodParameter; import org.springframework.core.ReactiveAdapterRegistry; import org.springframework.ui.Model; import org.springframework.web.reactive.BindingContext; import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolverSupport; import org.springframework.web.reactive.result.method.SyncHandlerMethodArgumentResolver; import org.springframework.web.server.ServerWebExchange; /** * Resolver for a controller method argument of type {@link Model} that can * also be resolved as a {@link java.util.Map}. * * @author Rossen Stoyanchev * @since 5.0 */ public class ModelArgumentResolver extends HandlerMethodArgumentResolverSupport implements SyncHandlerMethodArgumentResolver { public ModelArgumentResolver(ReactiveAdapterRegistry adapterRegistry) { super(adapterRegistry); } @Override public boolean supportsParameter(MethodParameter parameter) { return checkParameterTypeNoReactiveWrapper(parameter, type -> Model.class.isAssignableFrom(type) || Map.class.isAssignableFrom(type)); } @Override public Object resolveArgumentValue( MethodParameter parameter, BindingContext context, ServerWebExchange exchange) { Class<?> type = parameter.getParameterType(); if (Model.class.isAssignableFrom(type)) { return context.getModel(); } else if (Map.class.isAssignableFrom(type)) { return context.getModel().asMap(); } else { // Should never happen.. throw new IllegalStateException("Unexpected method parameter type: " + type); } } }