org.springframework.web.reactive.result.method.annotation.ModelArgumentResolver Maven / Gradle / Ivy
/*
* 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);
}
}
}