org.springframework.web.context.request

Class FacesRequestAttributes

java.lang.Object

org.springframework.web.context.request.FacesRequestAttributes

All Implemented Interfaces:

RequestAttributes

Direct Known Subclasses:

FacesWebRequest

public class FacesRequestAttributes
extends Object
implements RequestAttributes

RequestAttributes adapter for a JSF FacesContext. Used as default in a JSF environment, wrapping the current FacesContext.

NOTE: In contrast to ServletRequestAttributes, this variant does not support destruction callbacks for scoped attributes, neither for the request scope nor for the session scope. If you rely on such implicit destruction callbacks, consider defining a Spring RequestContextListener in your web.xml.

Requires JSF 2.0 or higher, as of Spring 4.0.

Since:

2.5.2

Author:

Juergen Hoeller

See Also:

FacesContext.getExternalContext(), ExternalContext.getRequestMap(), ExternalContext.getSessionMap(), RequestContextHolder.currentRequestAttributes()

Field Summary

Fields inherited from interface org.springframework.web.context.request.RequestAttributes

REFERENCE_REQUEST, REFERENCE_SESSION, SCOPE_REQUEST, SCOPE_SESSION

Constructor Summary

Constructors

Constructor and Description
FacesRequestAttributes(FacesContext facesContext) Create a new FacesRequestAttributes adapter for the given FacesContext.

Method Summary

Modifier and Type	Method and Description
Object	getAttribute(String name, int scope) Return the value for the scoped attribute of the given name, if any.
protected Map<String,Object>	getAttributeMap(int scope) Return the JSF attribute Map for the specified scope.
String[]	getAttributeNames(int scope) Retrieve the names of all attributes in the scope.
protected ExternalContext	getExternalContext() Return the JSF ExternalContext that this adapter operates on.
protected FacesContext	getFacesContext() Return the JSF FacesContext that this adapter operates on.
String	getSessionId() Return an id for the current underlying session.
Object	getSessionMutex() Expose the best available mutex for the underlying session: that is, an object to synchronize on for the underlying session.
void	registerDestructionCallback(String name, Runnable callback, int scope) Register a callback to be executed on destruction of the specified attribute in the given scope.
void	removeAttribute(String name, int scope) Remove the scoped attribute of the given name, if it exists.
Object	resolveReference(String key) Resolve the contextual reference for the given key, if any.
void	setAttribute(String name, Object value, int scope) Set the value for the scoped attribute of the given name, replacing an existing value (if any).

Methods inherited from class java.lang.Object

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

Constructor Detail

FacesRequestAttributes

public FacesRequestAttributes(FacesContext facesContext)

Create a new FacesRequestAttributes adapter for the given FacesContext.

Parameters:

facesContext - the current FacesContext

See Also:

FacesContext.getCurrentInstance()

Method Detail

getFacesContext

protected final FacesContext getFacesContext()

Return the JSF FacesContext that this adapter operates on.

getExternalContext

protected final ExternalContext getExternalContext()

Return the JSF ExternalContext that this adapter operates on.

See Also:

FacesContext.getExternalContext()

getAttributeMap

protected Map<String,Object> getAttributeMap(int scope)

Return the JSF attribute Map for the specified scope.

Parameters:

scope - constant indicating request or session scope

Returns:

the Map representation of the attributes in the specified scope

See Also:

RequestAttributes.SCOPE_REQUEST, RequestAttributes.SCOPE_SESSION

getAttribute

public Object getAttribute(String name,
                           int scope)

Description copied from interface: RequestAttributes

Return the value for the scoped attribute of the given name, if any.

Specified by:

getAttribute in interface RequestAttributes

Parameters:

name - the name of the attribute

scope - the scope identifier

Returns:

the current attribute value, or null if not found

setAttribute

public void setAttribute(String name,
                         Object value,
                         int scope)

Description copied from interface: RequestAttributes

Set the value for the scoped attribute of the given name, replacing an existing value (if any).

Specified by:

setAttribute in interface RequestAttributes

Parameters:

name - the name of the attribute

value - the value for the attribute

scope - the scope identifier

removeAttribute

public void removeAttribute(String name,
                            int scope)

Description copied from interface: RequestAttributes

Remove the scoped attribute of the given name, if it exists.

Note that an implementation should also remove a registered destruction callback for the specified attribute, if any. It does, however, not need to execute a registered destruction callback in this case, since the object will be destroyed by the caller (if appropriate).

Specified by:

removeAttribute in interface RequestAttributes

Parameters:

name - the name of the attribute

scope - the scope identifier

getAttributeNames

public String[] getAttributeNames(int scope)

Description copied from interface: RequestAttributes

Retrieve the names of all attributes in the scope.

Specified by:

getAttributeNames in interface RequestAttributes

Parameters:

scope - the scope identifier

Returns:

the attribute names as String array

registerDestructionCallback

public void registerDestructionCallback(String name,
                                        Runnable callback,
                                        int scope)

Description copied from interface: RequestAttributes

Register a callback to be executed on destruction of the specified attribute in the given scope.

Implementations should do their best to execute the callback at the appropriate time: that is, at request completion or session termination, respectively. If such a callback is not supported by the underlying runtime environment, the callback must be ignored and a corresponding warning should be logged.

Note that 'destruction' usually corresponds to destruction of the entire scope, not to the individual attribute having been explicitly removed by the application. If an attribute gets removed via this facade's RequestAttributes.removeAttribute(String, int) method, any registered destruction callback should be disabled as well, assuming that the removed object will be reused or manually destroyed.

NOTE: Callback objects should generally be serializable if they are being registered for a session scope. Otherwise the callback (or even the entire session) might not survive web app restarts.

Specified by:

registerDestructionCallback in interface RequestAttributes

Parameters:

name - the name of the attribute to register the callback for

callback - the destruction callback to be executed

scope - the scope identifier

resolveReference

public Object resolveReference(String key)

Description copied from interface: RequestAttributes

Resolve the contextual reference for the given key, if any.

At a minimum: the HttpServletRequest reference for key "request", and the HttpSession reference for key "session".

Specified by:

resolveReference in interface RequestAttributes

Parameters:

key - the contextual key

Returns:

the corresponding object, or null if none found

getSessionId

public String getSessionId()

Description copied from interface: RequestAttributes

Return an id for the current underlying session.

Specified by:

getSessionId in interface RequestAttributes

Returns:

the session id as String (never null)

getSessionMutex

public Object getSessionMutex()

Description copied from interface: RequestAttributes

Expose the best available mutex for the underlying session: that is, an object to synchronize on for the underlying session.

Specified by:

getSessionMutex in interface RequestAttributes

Returns:

the session mutex to use (never null)