org.springframework.web.reactive.result.view

Class HttpMessageWriterView

java.lang.Object

org.springframework.web.reactive.result.view.HttpMessageWriterView

All Implemented Interfaces:

View

public class HttpMessageWriterView
extends Object
implements View

View that writes model attribute(s) with an HttpMessageWriter.

Since:

5.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
HttpMessageWriterView(Encoder<?> encoder) Constructor with an Encoder.
HttpMessageWriterView(HttpMessageWriter<?> writer) Constructor with a fully initialized HttpMessageWriter.

Method Summary

Modifier and Type	Method and Description
HttpMessageWriter<?>	getMessageWriter() Return the configured message writer.
Set<String>	getModelKeys() Return the configured model keys.
List<MediaType>	getSupportedMediaTypes() Return the list of media types this View supports, or an empty list.
reactor.core.publisher.Mono<Void>	render(Map<String,?> model, MediaType contentType, ServerWebExchange exchange) Render the view based on the given HandlerResult.
void	setModelKeys(Set<String> modelKeys) Set the attributes in the model that should be rendered by this view.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.web.reactive.result.view.View

isRedirectView

Constructor Detail

HttpMessageWriterView

public HttpMessageWriterView(Encoder<?> encoder)

Constructor with an Encoder.

HttpMessageWriterView

public HttpMessageWriterView(HttpMessageWriter<?> writer)

Constructor with a fully initialized HttpMessageWriter.

Method Detail

getMessageWriter

public HttpMessageWriter<?> getMessageWriter()

Return the configured message writer.

getSupportedMediaTypes

public List<MediaType> getSupportedMediaTypes()

Return the list of media types this View supports, or an empty list.

The implementation of this method for HttpMessageWriterView delegates to HttpMessageWriter.getWritableMediaTypes().

Specified by:

getSupportedMediaTypes in interface View

setModelKeys

public void setModelKeys(@Nullable
                         Set<String> modelKeys)

Set the attributes in the model that should be rendered by this view. When set, all other model attributes will be ignored. The matching attributes are further narrowed with HttpMessageWriter.canWrite(org.springframework.core.ResolvableType, org.springframework.http.MediaType). The matching attributes are processed as follows:

• 0: nothing is written to the response body.
• 1: the matching attribute is passed to the writer.
• 2..N: if the writer supports Map, write all matches; otherwise raise an IllegalStateException.

getModelKeys

public final Set<String> getModelKeys()

Return the configured model keys.

render

public reactor.core.publisher.Mono<Void> render(@Nullable
                                                Map<String,?> model,
                                                @Nullable
                                                MediaType contentType,
                                                ServerWebExchange exchange)

Description copied from interface: View

Render the view based on the given HandlerResult. Implementations can access and use the model or only a specific attribute in it.

Specified by:

render in interface View

Parameters:

model - Map with name Strings as keys and corresponding model objects as values (Map can also be null in case of empty model)

contentType - the content type selected to render with which should match one of the supported media types.

exchange - the current exchange

Returns:

Mono to represent when and if rendering succeeds