Java Code Examples for org.springframework.web.reactive.HandlerResult#getReturnValue()

The following examples show how to use org.springframework.web.reactive.HandlerResult#getReturnValue() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: RequestMappingInfoHandlerMappingTests.java From spring-analysis-note with MIT License

6 votes

private void testHttpOptions(String requestURI, Set<HttpMethod> allowedMethods) {
	ServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.options(requestURI));
	HandlerMethod handlerMethod = (HandlerMethod) this.handlerMapping.getHandler(exchange).block();

	BindingContext bindingContext = new BindingContext();
	InvocableHandlerMethod invocable = new InvocableHandlerMethod(handlerMethod);
	Mono<HandlerResult> mono = invocable.invoke(exchange, bindingContext);

	HandlerResult result = mono.block();
	assertNotNull(result);

	Object value = result.getReturnValue();
	assertNotNull(value);
	assertEquals(HttpHeaders.class, value.getClass());
	assertEquals(allowedMethods, ((HttpHeaders) value).getAllow());
}

Example 2

Source File: RequestMappingInfoHandlerMappingTests.java From java-technology-stack with MIT License

6 votes

private void testHttpOptions(String requestURI, Set<HttpMethod> allowedMethods) {
	ServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.options(requestURI));
	HandlerMethod handlerMethod = (HandlerMethod) this.handlerMapping.getHandler(exchange).block();

	BindingContext bindingContext = new BindingContext();
	InvocableHandlerMethod invocable = new InvocableHandlerMethod(handlerMethod);
	Mono<HandlerResult> mono = invocable.invoke(exchange, bindingContext);

	HandlerResult result = mono.block();
	assertNotNull(result);

	Object value = result.getReturnValue();
	assertNotNull(value);
	assertEquals(HttpHeaders.class, value.getClass());
	assertEquals(allowedMethods, ((HttpHeaders) value).getAllow());
}

Example 3

Source File: ServerResponseResultHandler.java From spring-analysis-note with MIT License

5 votes

@Override
public Mono<Void> handleResult(ServerWebExchange exchange, HandlerResult result) {
	ServerResponse response = (ServerResponse) result.getReturnValue();
	Assert.state(response != null, "No ServerResponse");
	return response.writeTo(exchange, new ServerResponse.Context() {
		@Override
		public List<HttpMessageWriter<?>> messageWriters() {
			return messageWriters;
		}
		@Override
		public List<ViewResolver> viewResolvers() {
			return viewResolvers;
		}
	});
}

Example 4

Source File: ModelInitializer.java From spring-analysis-note with MIT License

5 votes

private Mono<Void> handleResult(HandlerResult handlerResult, BindingContext bindingContext) {
	Object value = handlerResult.getReturnValue();
	if (value != null) {
		ResolvableType type = handlerResult.getReturnType();
		ReactiveAdapter adapter = this.adapterRegistry.getAdapter(type.resolve(), value);
		if (isAsyncVoidType(type, adapter)) {
			return Mono.from(adapter.toPublisher(value));
		}
		String name = getAttributeName(handlerResult.getReturnTypeSource());
		bindingContext.getModel().asMap().putIfAbsent(name, value);
	}
	return Mono.empty();
}

Example 5

Source File: InitBinderBindingContext.java From spring-analysis-note with MIT License

5 votes

private void invokeBinderMethod(
		WebExchangeDataBinder dataBinder, ServerWebExchange exchange, SyncInvocableHandlerMethod binderMethod) {

	HandlerResult result = binderMethod.invokeForHandlerResult(exchange, this.binderMethodContext, dataBinder);
	if (result != null && result.getReturnValue() != null) {
		throw new IllegalStateException(
				"@InitBinder methods must not return a value (should be void): " + binderMethod);
	}
	// Should not happen (no Model argument resolution) ...
	if (!this.binderMethodContext.getModel().asMap().isEmpty()) {
		throw new IllegalStateException(
				"@InitBinder methods are not allowed to add model attributes: " + binderMethod);
	}
}

Example 6

Source File: ResponseEntityResultHandler.java From spring-analysis-note with MIT License

5 votes

@Nullable
private static Class<?> resolveReturnValueType(HandlerResult result) {
	Class<?> valueType = result.getReturnType().toClass();
	Object value = result.getReturnValue();
	if (valueType == Object.class && value != null) {
		valueType = value.getClass();
	}
	return valueType;
}

Example 7

Source File: ServerResponseResultHandler.java From java-technology-stack with MIT License

5 votes

@Override
public Mono<Void> handleResult(ServerWebExchange exchange, HandlerResult result) {
	ServerResponse response = (ServerResponse) result.getReturnValue();
	Assert.state(response != null, "No ServerResponse");
	return response.writeTo(exchange, new ServerResponse.Context() {
		@Override
		public List<HttpMessageWriter<?>> messageWriters() {
			return messageWriters;
		}
		@Override
		public List<ViewResolver> viewResolvers() {
			return viewResolvers;
		}
	});
}

Example 8

Source File: ModelInitializer.java From java-technology-stack with MIT License

5 votes

private Mono<Void> handleResult(HandlerResult handlerResult, BindingContext bindingContext) {
	Object value = handlerResult.getReturnValue();
	if (value != null) {
		ResolvableType type = handlerResult.getReturnType();
		ReactiveAdapter adapter = this.adapterRegistry.getAdapter(type.resolve(), value);
		if (isAsyncVoidType(type, adapter)) {
			return Mono.from(adapter.toPublisher(value));
		}
		String name = getAttributeName(handlerResult.getReturnTypeSource());
		bindingContext.getModel().asMap().putIfAbsent(name, value);
	}
	return Mono.empty();
}

Example 9

Source File: InitBinderBindingContext.java From java-technology-stack with MIT License

5 votes

private void invokeBinderMethod(
		WebExchangeDataBinder dataBinder, ServerWebExchange exchange, SyncInvocableHandlerMethod binderMethod) {

	HandlerResult result = binderMethod.invokeForHandlerResult(exchange, this.binderMethodContext, dataBinder);
	if (result != null && result.getReturnValue() != null) {
		throw new IllegalStateException(
				"@InitBinder methods must not return a value (should be void): " + binderMethod);
	}
	// Should not happen (no Model argument resolution) ...
	if (!this.binderMethodContext.getModel().asMap().isEmpty()) {
		throw new IllegalStateException(
				"@InitBinder methods are not allowed to add model attributes: " + binderMethod);
	}
}

Example 10

Source File: ResponseEntityResultHandler.java From java-technology-stack with MIT License

5 votes

@Nullable
private static Class<?> resolveReturnValueType(HandlerResult result) {
	Class<?> valueType = result.getReturnType().toClass();
	Object value = result.getReturnValue();
	if (valueType == Object.class && value != null) {
		valueType = value.getClass();
	}
	return valueType;
}

Example 11

Source File: ServerResponseResultHandler.java From spring-analysis-note with MIT License

4 votes

@Override
public boolean supports(HandlerResult result) {
	return (result.getReturnValue() instanceof ServerResponse);
}

Example 12

Source File: ViewResolutionResultHandler.java From spring-analysis-note with MIT License

4 votes

@Override
@SuppressWarnings("unchecked")
public Mono<Void> handleResult(ServerWebExchange exchange, HandlerResult result) {
	Mono<Object> valueMono;
	ResolvableType valueType;
	ReactiveAdapter adapter = getAdapter(result);

	if (adapter != null) {
		if (adapter.isMultiValue()) {
			throw new IllegalArgumentException(
					"Multi-value reactive types not supported in view resolution: " + result.getReturnType());
		}

		valueMono = (result.getReturnValue() != null ?
				Mono.from(adapter.toPublisher(result.getReturnValue())) : Mono.empty());

		valueType = (adapter.isNoValue() ? ResolvableType.forClass(Void.class) :
				result.getReturnType().getGeneric());
	}
	else {
		valueMono = Mono.justOrEmpty(result.getReturnValue());
		valueType = result.getReturnType();
	}

	return valueMono
			.switchIfEmpty(exchange.isNotModified() ? Mono.empty() : NO_VALUE_MONO)
			.flatMap(returnValue -> {

				Mono<List<View>> viewsMono;
				Model model = result.getModel();
				MethodParameter parameter = result.getReturnTypeSource();
				Locale locale = LocaleContextHolder.getLocale(exchange.getLocaleContext());

				Class<?> clazz = valueType.toClass();
				if (clazz == Object.class) {
					clazz = returnValue.getClass();
				}

				if (returnValue == NO_VALUE || clazz == void.class || clazz == Void.class) {
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}
				else if (CharSequence.class.isAssignableFrom(clazz) && !hasModelAnnotation(parameter)) {
					viewsMono = resolveViews(returnValue.toString(), locale);
				}
				else if (Rendering.class.isAssignableFrom(clazz)) {
					Rendering render = (Rendering) returnValue;
					HttpStatus status = render.status();
					if (status != null) {
						exchange.getResponse().setStatusCode(status);
					}
					exchange.getResponse().getHeaders().putAll(render.headers());
					model.addAllAttributes(render.modelAttributes());
					Object view = render.view();
					if (view == null) {
						view = getDefaultViewName(exchange);
					}
					viewsMono = (view instanceof String ? resolveViews((String) view, locale) :
							Mono.just(Collections.singletonList((View) view)));
				}
				else if (Model.class.isAssignableFrom(clazz)) {
					model.addAllAttributes(((Model) returnValue).asMap());
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}
				else if (Map.class.isAssignableFrom(clazz) && !hasModelAnnotation(parameter)) {
					model.addAllAttributes((Map<String, ?>) returnValue);
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}
				else if (View.class.isAssignableFrom(clazz)) {
					viewsMono = Mono.just(Collections.singletonList((View) returnValue));
				}
				else {
					String name = getNameForReturnValue(parameter);
					model.addAttribute(name, returnValue);
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}

				updateBindingContext(result.getBindingContext(), exchange);

				return viewsMono.flatMap(views -> render(views, model.asMap(), exchange));
			});
}

Example 13

Source File: ResponseBodyResultHandler.java From spring-analysis-note with MIT License

4 votes

@Override
public Mono<Void> handleResult(ServerWebExchange exchange, HandlerResult result) {
	Object body = result.getReturnValue();
	MethodParameter bodyTypeParameter = result.getReturnTypeSource();
	return writeBody(body, bodyTypeParameter, exchange);
}

Example 14

Source File: ServerResponseResultHandler.java From java-technology-stack with MIT License

4 votes

@Override
public boolean supports(HandlerResult result) {
	return (result.getReturnValue() instanceof ServerResponse);
}

Example 15

Source File: ViewResolutionResultHandler.java From java-technology-stack with MIT License

4 votes

@Override
@SuppressWarnings("unchecked")
public Mono<Void> handleResult(ServerWebExchange exchange, HandlerResult result) {
	Mono<Object> valueMono;
	ResolvableType valueType;
	ReactiveAdapter adapter = getAdapter(result);

	if (adapter != null) {
		if (adapter.isMultiValue()) {
			throw new IllegalArgumentException(
					"Multi-value reactive types not supported in view resolution: " + result.getReturnType());
		}

		valueMono = (result.getReturnValue() != null ?
				Mono.from(adapter.toPublisher(result.getReturnValue())) : Mono.empty());

		valueType = (adapter.isNoValue() ? ResolvableType.forClass(Void.class) :
				result.getReturnType().getGeneric());
	}
	else {
		valueMono = Mono.justOrEmpty(result.getReturnValue());
		valueType = result.getReturnType();
	}

	return valueMono
			.switchIfEmpty(exchange.isNotModified() ? Mono.empty() : NO_VALUE_MONO)
			.flatMap(returnValue -> {

				Mono<List<View>> viewsMono;
				Model model = result.getModel();
				MethodParameter parameter = result.getReturnTypeSource();
				Locale locale = LocaleContextHolder.getLocale(exchange.getLocaleContext());

				Class<?> clazz = valueType.toClass();
				if (clazz == Object.class) {
					clazz = returnValue.getClass();
				}

				if (returnValue == NO_VALUE || clazz == void.class || clazz == Void.class) {
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}
				else if (CharSequence.class.isAssignableFrom(clazz) && !hasModelAnnotation(parameter)) {
					viewsMono = resolveViews(returnValue.toString(), locale);
				}
				else if (Rendering.class.isAssignableFrom(clazz)) {
					Rendering render = (Rendering) returnValue;
					HttpStatus status = render.status();
					if (status != null) {
						exchange.getResponse().setStatusCode(status);
					}
					exchange.getResponse().getHeaders().putAll(render.headers());
					model.addAllAttributes(render.modelAttributes());
					Object view = render.view();
					if (view == null) {
						view = getDefaultViewName(exchange);
					}
					viewsMono = (view instanceof String ? resolveViews((String) view, locale) :
							Mono.just(Collections.singletonList((View) view)));
				}
				else if (Model.class.isAssignableFrom(clazz)) {
					model.addAllAttributes(((Model) returnValue).asMap());
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}
				else if (Map.class.isAssignableFrom(clazz) && !hasModelAnnotation(parameter)) {
					model.addAllAttributes((Map<String, ?>) returnValue);
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}
				else if (View.class.isAssignableFrom(clazz)) {
					viewsMono = Mono.just(Collections.singletonList((View) returnValue));
				}
				else {
					String name = getNameForReturnValue(parameter);
					model.addAttribute(name, returnValue);
					viewsMono = resolveViews(getDefaultViewName(exchange), locale);
				}

				updateBindingContext(result.getBindingContext(), exchange);

				return viewsMono.flatMap(views -> render(views, model.asMap(), exchange));
			});
}

Example 16

Source File: ResponseBodyResultHandler.java From java-technology-stack with MIT License

4 votes

@Override
public Mono<Void> handleResult(ServerWebExchange exchange, HandlerResult result) {
	Object body = result.getReturnValue();
	MethodParameter bodyTypeParameter = result.getReturnTypeSource();
	return writeBody(body, bodyTypeParameter, exchange);
}