org.springframework.web.reactive.result.view

Class ViewResolutionResultHandler

java.lang.Object

org.springframework.web.reactive.result.HandlerResultHandlerSupport

org.springframework.web.reactive.result.view.ViewResolutionResultHandler

All Implemented Interfaces:

Ordered, HandlerResultHandler

public class ViewResolutionResultHandler
extends HandlerResultHandlerSupport
implements HandlerResultHandler, Ordered

HandlerResultHandler that encapsulates the view resolution algorithm supporting the following return types:

• Void or no value -- default view name
• String -- view name unless @ModelAttribute-annotated
• View -- View to render with
• Model -- attributes to add to the model
• Map -- attributes to add to the model
• Rendering -- use case driven API for view resolution
• @ModelAttribute -- attribute for the model
• Non-simple value -- attribute for the model

A String-based view name is resolved through the configured ViewResolver instances into a View to use for rendering. If a view is left unspecified (e.g. by returning null or a model-related return value), a default view name is selected.

By default this resolver is ordered at Ordered.LOWEST_PRECEDENCE and generally needs to be late in the order since it interprets any String return value as a view name or any non-simple value type as a model attribute while other result handlers may interpret the same otherwise based on the presence of annotations, e.g. for @ResponseBody.

Since:

5.0

Author:

Rossen Stoyanchev

Field Summary

Fields inherited from class org.springframework.web.reactive.result.HandlerResultHandlerSupport

logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor and Description
ViewResolutionResultHandler(List<ViewResolver> viewResolvers, RequestedContentTypeResolver contentTypeResolver) Basic constructor with a default ReactiveAdapterRegistry.
ViewResolutionResultHandler(List<ViewResolver> viewResolvers, RequestedContentTypeResolver contentTypeResolver, ReactiveAdapterRegistry registry) Constructor with an ReactiveAdapterRegistry instance.

Method Summary

Modifier and Type	Method and Description
List<View>	getDefaultViews() Return the configured default View's.
List<ViewResolver>	getViewResolvers() Return a read-only list of view resolvers.
reactor.core.publisher.Mono<Void>	handleResult(ServerWebExchange exchange, HandlerResult result) Process the given result modifying response headers and/or writing data to the response.
void	setDefaultViews(List<View> defaultViews) Set the default views to consider always when resolving view names and trying to satisfy the best matching content type.
boolean	supports(HandlerResult result) Whether this handler supports the given HandlerResult.

Methods inherited from class org.springframework.web.reactive.result.HandlerResultHandlerSupport

getAdapter, getAdapterRegistry, getContentTypeResolver, getOrder, selectMediaType, setOrder

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.core.Ordered

getOrder

Constructor Detail

ViewResolutionResultHandler

public ViewResolutionResultHandler(List<ViewResolver> viewResolvers,
                                   RequestedContentTypeResolver contentTypeResolver)

Basic constructor with a default ReactiveAdapterRegistry.

Parameters:

viewResolvers - the resolver to use

contentTypeResolver - to determine the requested content type

ViewResolutionResultHandler

public ViewResolutionResultHandler(List<ViewResolver> viewResolvers,
                                   RequestedContentTypeResolver contentTypeResolver,
                                   ReactiveAdapterRegistry registry)

Constructor with an ReactiveAdapterRegistry instance.

Parameters:

viewResolvers - the view resolver to use

contentTypeResolver - to determine the requested content type

registry - for adaptation to reactive types

Method Detail

getViewResolvers

public List<ViewResolver> getViewResolvers()

Return a read-only list of view resolvers.

setDefaultViews

public void setDefaultViews(@Nullable
                            List<View> defaultViews)

Set the default views to consider always when resolving view names and trying to satisfy the best matching content type.

getDefaultViews

public List<View> getDefaultViews()

Return the configured default View's.

supports

public boolean supports(HandlerResult result)

Description copied from interface: HandlerResultHandler

Whether this handler supports the given HandlerResult.

Specified by:

supports in interface HandlerResultHandler

Parameters:

result - the result object to check

Returns:

whether or not this object can use the given result

handleResult

public reactor.core.publisher.Mono<Void> handleResult(ServerWebExchange exchange,
                                                      HandlerResult result)

Description copied from interface: HandlerResultHandler

Process the given result modifying response headers and/or writing data to the response.

Specified by:

handleResult in interface HandlerResultHandler

Parameters:

exchange - current server exchange

result - the result from the handling

Returns:

Mono<Void> to indicate when request handling is complete.