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, 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 (for example, 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, for example, for @ResponseBody.

since:

5.0

Author:

Rossen stoyanchev

Field summary

Fields inherited from class HandlerResultHandlersupport

logger

Fields inherited from interface Ordered

HIGHEsT_PRECEDENCE, LOWEsT_PRECEDENCE

Constructor summary

Constructors

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

Method summary

Modifier and Type	Method	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&nbsp;exchange, HandlerResult&nbsp;result)	Process the given result modifying response headers and/or writing data to the response.
void	setDefaultViews(@Nullable List<View>&nbsp;defaultViews)	set the default views to consider always when resolving view names and trying to satisfy the best matching content type.
boolean	supports(HandlerResult&nbsp;result)	Whether this handler supports the given HandlerResult.

Methods inherited from class HandlerResultHandlersupport

getAdapter, getAdapterRegistry, getContentTypeResolver, getOrder, selectMediaType, selectMediaType, setOrder

Methods inherited from class Object

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

Methods inherited from interface Ordered

getOrder

Constructor Details

ViewResolutionResultHandler

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

Basic constructor with a default ReactiveAdapterRegistry.

Parameters:

viewResolvers - the resolver to use

contentTypeResolver - to determine the requested content type

ViewResolutionResultHandler

public&nbsp;ViewResolutionResultHandler(List<ViewResolver>&nbsp;viewResolvers,
 RequestedContentTypeResolver&nbsp;contentTypeResolver,
 ReactiveAdapterRegistry&nbsp;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 Details

getViewResolvers

public&nbsp;List<ViewResolver>&nbsp;getViewResolvers()

Return a read-only list of view resolvers.

setDefaultViews

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

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

getDefaultViews

public&nbsp;List<View>&nbsp;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 this object can use the given result

handleResult

public&nbsp;reactor.core.publisher.Mono<Void>&nbsp;handleResult(serverWebExchange&nbsp;exchange,
 HandlerResult&nbsp;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.