/*
* Copyright 2002-2017 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.function.server.support;
import reactor.core.publisher.Mono;
import org.springframework.util.Assert;
import org.springframework.web.reactive.HandlerResult;
import org.springframework.web.reactive.HandlerResultHandler;
import org.springframework.web.reactive.function.server.HandlerStrategies;
import org.springframework.web.reactive.function.server.ServerResponse;
import org.springframework.web.server.ServerWebExchange;
/**
* {@code HandlerResultHandler} implementation that supports {@link ServerResponse}s.
*
* @author Arjen Poutsma
* @since 5.0
*/
public class ServerResponseResultHandler implements HandlerResultHandler {
private final HandlerStrategies strategies;
/**
* Create a {@code ServerResponseResultHandler} with default strategies.
*/
public ServerResponseResultHandler() {
this(HandlerStrategies.builder().build());
}
/**
* Create a {@code ServerResponseResultHandler} with the given strategies.
*/
public ServerResponseResultHandler(HandlerStrategies strategies) {
Assert.notNull(strategies, "HandlerStrategies must not be null");
this.strategies = strategies;
}
@Override
public boolean supports(HandlerResult result) {
return result.getReturnValue()
.filter(o -> o instanceof ServerResponse)
.isPresent();
}
@Override
public Mono<Void> handleResult(ServerWebExchange exchange, HandlerResult result) {
ServerResponse response = (ServerResponse) result.getReturnValue().orElseThrow(IllegalStateException::new);
return response.writeTo(exchange, this.strategies);
}
}