org.springframework.web.reactive.result.view

Class RequestContext

java.lang.Object

org.springframework.web.reactive.result.view.RequestContext

public class RequestContext
extends java.lang.Object

Context holder for request-specific state, like the MessageSource to use, current locale, binding errors, etc. Provides easy access to localized messages and Errors instances.

Suitable for exposition to views, and usage within FreeMarker templates, and tag libraries.

Can be instantiated manually, or automatically exposed to views as model attribute via AbstractView's "requestContextAttribute" property.

Since:

5.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
RequestContext(ServerWebExchange exchange, java.util.Map<java.lang.String,java.lang.Object> model, MessageSource messageSource)
RequestContext(ServerWebExchange exchange, java.util.Map<java.lang.String,java.lang.Object> model, MessageSource messageSource, RequestDataValueProcessor dataValueProcessor)

Method Summary

Modifier and Type	Method and Description
void	changeLocale(java.util.Locale locale) Change the current locale to the specified one.
void	changeLocale(java.util.Locale locale, java.util.TimeZone timeZone) Change the current locale to the specified locale and time zone context.
BindStatus	getBindStatus(java.lang.String path) Create a BindStatus for the given bind object using the "defaultHtmlEscape" setting.
BindStatus	getBindStatus(java.lang.String path, boolean htmlEscape) Create a BindStatus for the given bind object, using the "defaultHtmlEscape" setting.
java.lang.String	getContextPath() Return the context path of the current web application.
java.lang.String	getContextUrl(java.lang.String relativeUrl) Return a context-aware URl for the given relative URL.
java.lang.String	getContextUrl(java.lang.String relativeUrl, java.util.Map<java.lang.String,?> params) Return a context-aware URl for the given relative URL with placeholders -- named keys with braces {}.
java.lang.Boolean	getDefaultHtmlEscape() Return the default HTML escape setting, differentiating between no default specified and an explicit value.
Errors	getErrors(java.lang.String name) Retrieve the Errors instance for the given bind object, using the "defaultHtmlEscape" setting.
Errors	getErrors(java.lang.String name, boolean htmlEscape) Retrieve the Errors instance for the given bind object.
protected ServerWebExchange	getExchange()
java.util.Locale	getLocale() Return the current Locale.
java.lang.String	getMessage(MessageSourceResolvable resolvable) Retrieve the given MessageSourceResolvable (e.g.
java.lang.String	getMessage(MessageSourceResolvable resolvable, boolean htmlEscape) Retrieve the given MessageSourceResolvable (e.g.
java.lang.String	getMessage(java.lang.String code) Retrieve the message for the given code, using the "defaultHtmlEscape" setting.
java.lang.String	getMessage(java.lang.String code, java.util.List<?> args) Retrieve the message for the given code, using the "defaultHtmlEscape" setting.
java.lang.String	getMessage(java.lang.String code, java.util.List<?> args, java.lang.String defaultMessage) Retrieve the message for the given code, using the "defaultHtmlEscape" setting.
java.lang.String	getMessage(java.lang.String code, java.lang.Object[] args) Retrieve the message for the given code, using the "defaultHtmlEscape" setting.
java.lang.String	getMessage(java.lang.String code, java.lang.Object[] args, boolean htmlEscape) Retrieve the message for the given code.
java.lang.String	getMessage(java.lang.String code, java.lang.Object[] args, java.lang.String defaultMessage) Retrieve the message for the given code, using the "defaultHtmlEscape" setting.
java.lang.String	getMessage(java.lang.String code, java.lang.Object[] args, java.lang.String defaultMessage, boolean htmlEscape) Retrieve the message for the given code.
java.lang.String	getMessage(java.lang.String code, java.lang.String defaultMessage) Retrieve the message for the given code, using the "defaultHtmlEscape" setting.
MessageSource	getMessageSource() Return the MessageSource in use with this request.
java.util.Map<java.lang.String,java.lang.Object>	getModel() Return the model Map that this RequestContext encapsulates, if any.
protected <T> T	getModelObject(java.lang.String modelName) Retrieve the model object for the given model name, either from the model or from the request attributes.
java.lang.String	getQueryString() Return the query string of the current request.
RequestDataValueProcessor	getRequestDataValueProcessor() Return the RequestDataValueProcessor instance to apply to in form tag libraries and to redirect URLs.
java.lang.String	getRequestPath() Return the request path of the request.
java.util.TimeZone	getTimeZone() Return the current TimeZone.
boolean	isDefaultHtmlEscape() Is default HTML escaping active? Falls back to false in case of no explicit default given.
void	setDefaultHtmlEscape(boolean defaultHtmlEscape) (De)activate default HTML escaping for messages and errors, for the scope of this RequestContext.

Methods inherited from class java.lang.Object

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

Constructor Detail

RequestContext

public RequestContext(ServerWebExchange exchange,
                      java.util.Map<java.lang.String,java.lang.Object> model,
                      MessageSource messageSource)

RequestContext

public RequestContext(ServerWebExchange exchange,
                      java.util.Map<java.lang.String,java.lang.Object> model,
                      MessageSource messageSource,
                      @Nullable
                      RequestDataValueProcessor dataValueProcessor)

Method Detail

getExchange

protected final ServerWebExchange getExchange()

getMessageSource

public MessageSource getMessageSource()

Return the MessageSource in use with this request.

getModel

@Nullable
public java.util.Map<java.lang.String,java.lang.Object> getModel()

Return the model Map that this RequestContext encapsulates, if any.

Returns:

the populated model Map, or null if none available

getLocale

public final java.util.Locale getLocale()

Return the current Locale.

getTimeZone

public java.util.TimeZone getTimeZone()

Return the current TimeZone.

changeLocale

public void changeLocale(java.util.Locale locale)

Change the current locale to the specified one.

changeLocale

public void changeLocale(java.util.Locale locale,
                         java.util.TimeZone timeZone)

Change the current locale to the specified locale and time zone context.

setDefaultHtmlEscape

public void setDefaultHtmlEscape(boolean defaultHtmlEscape)

(De)activate default HTML escaping for messages and errors, for the scope of this RequestContext.

TODO: currently no application-wide setting ...

isDefaultHtmlEscape

public boolean isDefaultHtmlEscape()

Is default HTML escaping active? Falls back to false in case of no explicit default given.

getDefaultHtmlEscape

@Nullable
public java.lang.Boolean getDefaultHtmlEscape()

Return the default HTML escape setting, differentiating between no default specified and an explicit value.

Returns:

whether default HTML escaping is enabled (null = no explicit default)

getRequestDataValueProcessor

@Nullable
public RequestDataValueProcessor getRequestDataValueProcessor()

Return the RequestDataValueProcessor instance to apply to in form tag libraries and to redirect URLs.

getContextPath

public java.lang.String getContextPath()

Return the context path of the current web application. This is useful for building links to other resources within the application.

Delegates to ServerHttpRequest.getPath().

getContextUrl

public java.lang.String getContextUrl(java.lang.String relativeUrl)

Return a context-aware URl for the given relative URL.

Parameters:

relativeUrl - the relative URL part

Returns:

a URL that points back to the current web application with an absolute path also URL-encoded accordingly

getContextUrl

public java.lang.String getContextUrl(java.lang.String relativeUrl,
                                      java.util.Map<java.lang.String,?> params)

Return a context-aware URl for the given relative URL with placeholders -- named keys with braces {}. For example, send in a relative URL foo/{bar}?spam={spam} and a parameter map {bar=baz,spam=nuts} and the result will be [contextpath]/foo/baz?spam=nuts.

Parameters:

relativeUrl - the relative URL part

params - a map of parameters to insert as placeholders in the url

Returns:

a URL that points back to the current web application with an absolute path also URL-encoded accordingly

getRequestPath

public java.lang.String getRequestPath()

Return the request path of the request. This is useful as HTML form action target, also in combination with the original query string.

getQueryString

public java.lang.String getQueryString()

Return the query string of the current request. This is useful for building an HTML form action target in combination with the original request path.

getMessage

public java.lang.String getMessage(java.lang.String code,
                                   java.lang.String defaultMessage)

Retrieve the message for the given code, using the "defaultHtmlEscape" setting.

Parameters:

code - code of the message

defaultMessage - String to return if the lookup fails

Returns:

the message

getMessage

public java.lang.String getMessage(java.lang.String code,
                                   @Nullable
                                   java.lang.Object[] args,
                                   java.lang.String defaultMessage)

Retrieve the message for the given code, using the "defaultHtmlEscape" setting.

Parameters:

code - code of the message

args - arguments for the message, or null if none

defaultMessage - String to return if the lookup fails

Returns:

the message

getMessage

public java.lang.String getMessage(java.lang.String code,
                                   @Nullable
                                   java.util.List<?> args,
                                   java.lang.String defaultMessage)

Retrieve the message for the given code, using the "defaultHtmlEscape" setting.

Parameters:

code - code of the message

args - arguments for the message as a List, or null if none

defaultMessage - String to return if the lookup fails

Returns:

the message

getMessage

public java.lang.String getMessage(java.lang.String code,
                                   @Nullable
                                   java.lang.Object[] args,
                                   java.lang.String defaultMessage,
                                   boolean htmlEscape)

Retrieve the message for the given code.

Parameters:

code - code of the message

args - arguments for the message, or null if none

defaultMessage - String to return if the lookup fails

htmlEscape - HTML escape the message?

Returns:

the message

getMessage

public java.lang.String getMessage(java.lang.String code)
                            throws NoSuchMessageException

Retrieve the message for the given code, using the "defaultHtmlEscape" setting.

Parameters:

code - code of the message

Returns:

the message

Throws:

NoSuchMessageException - if not found

getMessage

public java.lang.String getMessage(java.lang.String code,
                                   @Nullable
                                   java.lang.Object[] args)
                            throws NoSuchMessageException

Retrieve the message for the given code, using the "defaultHtmlEscape" setting.

Parameters:

code - code of the message

args - arguments for the message, or null if none

Returns:

the message

Throws:

NoSuchMessageException - if not found

getMessage

public java.lang.String getMessage(java.lang.String code,
                                   @Nullable
                                   java.util.List<?> args)
                            throws NoSuchMessageException

Retrieve the message for the given code, using the "defaultHtmlEscape" setting.

Parameters:

code - code of the message

args - arguments for the message as a List, or null if none

Returns:

the message

Throws:

NoSuchMessageException - if not found

getMessage

public java.lang.String getMessage(java.lang.String code,
                                   @Nullable
                                   java.lang.Object[] args,
                                   boolean htmlEscape)
                            throws NoSuchMessageException

Retrieve the message for the given code.

Parameters:

code - code of the message

args - arguments for the message, or null if none

htmlEscape - HTML escape the message?

Returns:

the message

Throws:

NoSuchMessageException - if not found

getMessage

public java.lang.String getMessage(MessageSourceResolvable resolvable)
                            throws NoSuchMessageException

Retrieve the given MessageSourceResolvable (e.g. an ObjectError instance), using the "defaultHtmlEscape" setting.

Parameters:

resolvable - the MessageSourceResolvable

Returns:

the message

Throws:

NoSuchMessageException - if not found

getMessage

public java.lang.String getMessage(MessageSourceResolvable resolvable,
                                   boolean htmlEscape)
                            throws NoSuchMessageException

Retrieve the given MessageSourceResolvable (e.g. an ObjectError instance).

Parameters:

resolvable - the MessageSourceResolvable

htmlEscape - HTML escape the message?

Returns:

the message

Throws:

NoSuchMessageException - if not found

getErrors

@Nullable
public Errors getErrors(java.lang.String name)

Retrieve the Errors instance for the given bind object, using the "defaultHtmlEscape" setting.

Parameters:

name - name of the bind object

Returns:

the Errors instance, or null if not found

getErrors

@Nullable
public Errors getErrors(java.lang.String name,
                                  boolean htmlEscape)

Retrieve the Errors instance for the given bind object.

Parameters:

name - name of the bind object

htmlEscape - create an Errors instance with automatic HTML escaping?

Returns:

the Errors instance, or null if not found

getModelObject

@Nullable
protected <T> T getModelObject(java.lang.String modelName)

Retrieve the model object for the given model name, either from the model or from the request attributes.

Parameters:

modelName - the name of the model object

Returns:

the model object

getBindStatus

public BindStatus getBindStatus(java.lang.String path)
                         throws java.lang.IllegalStateException

Create a BindStatus for the given bind object using the "defaultHtmlEscape" setting.

Parameters:

path - the bean and property path for which values and errors will be resolved (e.g. "person.age")

Returns:

the new BindStatus instance

Throws:

java.lang.IllegalStateException - if no corresponding Errors object found

getBindStatus

public BindStatus getBindStatus(java.lang.String path,
                                boolean htmlEscape)
                         throws java.lang.IllegalStateException

Create a BindStatus for the given bind object, using the "defaultHtmlEscape" setting.

Parameters:

path - the bean and property path for which values and errors will be resolved (e.g. "person.age")

htmlEscape - create a BindStatus with automatic HTML escaping?

Returns:

the new BindStatus instance

Throws:

java.lang.IllegalStateException - if no corresponding Errors object found