org.springframework.web.reactive.result

Class HandlerResultHandlerSupport

java.lang.Object

org.springframework.web.reactive.result.HandlerResultHandlerSupport

All Implemented Interfaces:

Ordered

Direct Known Subclasses:

AbstractMessageWriterResultHandler, ViewResolutionResultHandler

public abstract class HandlerResultHandlerSupport
extends java.lang.Object
implements Ordered

Base class for HandlerResultHandler with support for content negotiation and access to a ReactiveAdapter registry.

Since:

5.0

Author:

Rossen Stoyanchev

Field Summary

Fields

Modifier and Type	Field and Description
private ReactiveAdapterRegistry	adapterRegistry
private static java.util.List<MediaType>	ALL_APPLICATION_MEDIA_TYPES
private RequestedContentTypeResolver	contentTypeResolver
protected Log	logger
private int	order

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	HandlerResultHandlerSupport(RequestedContentTypeResolver contentTypeResolver, ReactiveAdapterRegistry adapterRegistry)

Method Summary

Modifier and Type	Method and Description
private java.util.List<MediaType>	getAcceptableTypes(ServerWebExchange exchange)
protected ReactiveAdapter	getAdapter(HandlerResult result) Get a ReactiveAdapter for the top-level return value type.
ReactiveAdapterRegistry	getAdapterRegistry() Return the configured ReactiveAdapterRegistry.
RequestedContentTypeResolver	getContentTypeResolver() Return the configured RequestedContentTypeResolver.
int	getOrder() Get the order value of this object.
private java.util.List<MediaType>	getProducibleTypes(ServerWebExchange exchange, java.util.function.Supplier<java.util.List<MediaType>> producibleTypesSupplier)
protected MediaType	selectMediaType(ServerWebExchange exchange, java.util.function.Supplier<java.util.List<MediaType>> producibleTypesSupplier) Select the best media type for the current request through a content negotiation algorithm.
private MediaType	selectMoreSpecificMediaType(MediaType acceptable, MediaType producible)
void	setOrder(int order) Set the order for this result handler relative to others.

Methods inherited from class java.lang.Object

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

Field Detail

ALL_APPLICATION_MEDIA_TYPES

private static final java.util.List<MediaType> ALL_APPLICATION_MEDIA_TYPES

logger

protected final Log logger

contentTypeResolver

private final RequestedContentTypeResolver contentTypeResolver

adapterRegistry

private final ReactiveAdapterRegistry adapterRegistry

order

private int order

Constructor Detail

HandlerResultHandlerSupport

protected HandlerResultHandlerSupport(RequestedContentTypeResolver contentTypeResolver,
                                      ReactiveAdapterRegistry adapterRegistry)

Method Detail

getAdapterRegistry

public ReactiveAdapterRegistry getAdapterRegistry()

Return the configured ReactiveAdapterRegistry.

getContentTypeResolver

public RequestedContentTypeResolver getContentTypeResolver()

Return the configured RequestedContentTypeResolver.

setOrder

public void setOrder(int order)

Set the order for this result handler relative to others.

By default set to Ordered.LOWEST_PRECEDENCE, however see Javadoc of sub-classes which may change this default.

Parameters:

order - the order

getOrder

public int getOrder()

Description copied from interface: Ordered

Get the order value of this object.

Higher values are interpreted as lower priority. As a consequence, the object with the lowest value has the highest priority (somewhat analogous to Servlet load-on-startup values).

Same order values will result in arbitrary sort positions for the affected objects.

Specified by:

getOrder in interface Ordered

Returns:

the order value

See Also:

Ordered.HIGHEST_PRECEDENCE, Ordered.LOWEST_PRECEDENCE

getAdapter

@Nullable
protected ReactiveAdapter getAdapter(HandlerResult result)

Get a ReactiveAdapter for the top-level return value type.

Returns:

the matching adapter, or null if none

selectMediaType

@Nullable
protected MediaType selectMediaType(ServerWebExchange exchange,
                                              java.util.function.Supplier<java.util.List<MediaType>> producibleTypesSupplier)

Select the best media type for the current request through a content negotiation algorithm.

Parameters:

exchange - the current request

producibleTypesSupplier - the media types that can be produced for the current request

Returns:

the selected media type, or null if none

getAcceptableTypes

private java.util.List<MediaType> getAcceptableTypes(ServerWebExchange exchange)

getProducibleTypes

private java.util.List<MediaType> getProducibleTypes(ServerWebExchange exchange,
                                                     java.util.function.Supplier<java.util.List<MediaType>> producibleTypesSupplier)

selectMoreSpecificMediaType

private MediaType selectMoreSpecificMediaType(MediaType acceptable,
                                              MediaType producible)