ServletExternalContext (Spring Web Flow 2.3.4.RELEASE API)

java.lang.Object
- org.springframework.webflow.context.servlet.ServletExternalContext

All Implemented Interfaces:

ExternalContext

Direct Known Subclasses:

MvcExternalContext
```
public class ServletExternalContext
extends java.lang.Object
implements ExternalContext
```
Provides contextual information about an HTTP Servlet environment that has interacted with Spring Web Flow.

Author:

Keith Donald, Erwin Vervaet, Jeremy Grelle

Constructor Summary

Constructors
Constructor and Description
`ServletExternalContext(javax.servlet.ServletContext context, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)` Create a new external context wrapping given servlet HTTP request and response and given servlet context.
`ServletExternalContext(javax.servlet.ServletContext context, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, FlowUrlHandler flowUrlHandler)` Create a new external context wrapping given servlet HTTP request and response and given servlet context.

Method Summary

Methods
Modifier and Type	Method and Description
`SharedAttributeMap`	`getApplicationMap()` Provides access to the external application map, providing a storage for data local to the current user application and accessible to both internal and external SWF artifacts.
`protected javax.servlet.ServletContext`	`getContext()` Returns the servlet context.
`java.lang.String`	`getContextPath()` Returns the logical path to the application hosting this external context.
`java.security.Principal`	`getCurrentUser()` Provides access to the user's principal security object.
`boolean`	`getExternalRedirectRequested()` Returns the flag indicating if an external redirect response has been requested by the flow.
`java.lang.String`	`getExternalRedirectUrl()` Returns the URL to redirect to.
`boolean`	`getFlowDefinitionRedirectRequested()` Returns the flag indicating if a flow definition redirect response has been requested by the flow.
`boolean`	`getFlowExecutionRedirectRequested()` Returns the flag indicating if a flow execution redirect response has been requested by the flow.
`java.lang.String`	`getFlowExecutionUrl(java.lang.String flowId, java.lang.String flowExecutionKey)` Get a flow execution URL for the execution with the provided key.
`java.lang.String`	`getFlowRedirectFlowId()` Returns the id of the flow definition to redirect to.
`MutableAttributeMap`	`getFlowRedirectFlowInput()` Returns the input to pass the flow definition through the redirect.
`protected FlowUrlHandler`	`getFlowUrlHandler()` Returns the configured flow url handler.
`SharedAttributeMap`	`getGlobalSessionMap()` Provides access to the global external session map, providing a storage for data globally accross the user session and accessible to both internal and external SWF artifacts.
`java.util.Locale`	`getLocale()` Returns the client locale.
`java.lang.Object`	`getNativeContext()` Provides access to the context object for the current environment.
`java.lang.Object`	`getNativeRequest()` Provides access to the request object for the current environment.
`java.lang.Object`	`getNativeResponse()` Provides access to the response object for the current environment.
`boolean`	`getRedirectInPopup()` If a redirect response has been requested, indicates if the redirect should be issued from a popup dialog.
`protected javax.servlet.http.HttpServletRequest`	`getRequest()` Returns the underlying HttpServletRequest.
`MutableAttributeMap`	`getRequestMap()` Provides access to the external request attribute map, providing a storage for data local to the current user request and accessible to both internal and external SWF artifacts.
`ParameterMap`	`getRequestParameterMap()` Provides access to the parameters associated with the user request that led to SWF being called.
`protected javax.servlet.http.HttpServletResponse`	`getResponse()` Returns the underlying HttpServletResponse.
`java.io.Writer`	`getResponseWriter()` Get a writer for writing out a response.
`SharedAttributeMap`	`getSessionMap()` Provides access to the external session map, providing a storage for data local to the current user session and accessible to both internal and external SWF artifacts.
`boolean`	`isAjaxRequest()` Returns true if the current request is an asynchronous Ajax request.
`boolean`	`isResponseAllowed()` Is a render response allowed to be written for this request? Always return false after a response has been completed.
`boolean`	`isResponseComplete()` Has the response been completed? Response complete status can be achieved by: Writing out the response and calling `ExternalContext.recordResponseComplete()`, or Calling one of the redirect request methods
`boolean`	`isResponseCompleteFlowExecutionRedirect()` Returns true if the response has been completed with flow execution redirect request.
`void`	`recordResponseComplete()` Called by flow artifacts such as View states and end states to indicate they handled the response, typically by writing out content to the response stream.
`void`	`requestExternalRedirect(java.lang.String location)` Request a redirect to an arbitrary resource location.
`void`	`requestFlowDefinitionRedirect(java.lang.String flowId, MutableAttributeMap input)` Request that a flow definition redirect be performed by the calling environment.
`void`	`requestFlowExecutionRedirect()` Request that a flow execution redirect be performed by the calling environment.
`void`	`requestRedirectInPopup()` Request that the current redirect requested be sent to the client in a manner that causes the client to issue the redirect from a popup dialog.
`void`	`setAjaxRequest(boolean ajaxRequest)` Indicates if the current request from this client is an ajax request.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ServletExternalContext
```
public ServletExternalContext(javax.servlet.ServletContext context,
                      javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response)
```
    Create a new external context wrapping given servlet HTTP request and response and given servlet context.
    
    Parameters:
    context - the servlet context
    request - the http servlet request
    response - the http servlet response
  - ServletExternalContext
```
public ServletExternalContext(javax.servlet.ServletContext context,
                      javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response,
                      FlowUrlHandler flowUrlHandler)
```
    Create a new external context wrapping given servlet HTTP request and response and given servlet context.
    
    Parameters:
    context - the servlet context
    request - the http servlet request
    response - the http servlet response
    flowUrlHandler - the flow url handler
- Method Detail
  - setAjaxRequest
```
public void setAjaxRequest(boolean ajaxRequest)
```
    Indicates if the current request from this client is an ajax request. This flag may effect the handling of response writing within Spring Web Flow.
    
    Parameters:
    ajaxRequest - the ajax request flag
  - getContextPath
```
public java.lang.String getContextPath()
```
    Description copied from interface: ExternalContext
    
    Returns the logical path to the application hosting this external context.
    
    Specified by:
    
    getContextPath in interface ExternalContext
    
    Returns:
    the context path
  - getRequestParameterMap
```
public ParameterMap getRequestParameterMap()
```
    Description copied from interface: ExternalContext
    
    Provides access to the parameters associated with the user request that led to SWF being called. This map is expected to be immutable and cannot be changed.
    
    Specified by:
    
    getRequestParameterMap in interface ExternalContext
    
    Returns:
    the immutable request parameter map
  - getRequestMap
```
public MutableAttributeMap getRequestMap()
```
    Description copied from interface: ExternalContext
    
    Provides access to the external request attribute map, providing a storage for data local to the current user request and accessible to both internal and external SWF artifacts.
    
    Specified by:
    
    getRequestMap in interface ExternalContext
    
    Returns:
    the mutable request attribute map
  - getSessionMap
```
public SharedAttributeMap getSessionMap()
```
    Description copied from interface: ExternalContext
    
    Provides access to the external session map, providing a storage for data local to the current user session and accessible to both internal and external SWF artifacts.
    
    Specified by:
    
    getSessionMap in interface ExternalContext
    
    Returns:
    the mutable session attribute map
  - getGlobalSessionMap
```
public SharedAttributeMap getGlobalSessionMap()
```
    Description copied from interface: ExternalContext
    
    Provides access to the global external session map, providing a storage for data globally accross the user session and accessible to both internal and external SWF artifacts.
    Note: most external context implementations do not distinguish between the concept of a "local" user session scope and a "global" session scope. The Portlet world does, but not the Servlet for example. In those cases calling this method returns the same map as calling ExternalContext.getSessionMap().
    
    Specified by:
    
    getGlobalSessionMap in interface ExternalContext
    
    Returns:
    the mutable global session attribute map
  - getApplicationMap
```
public SharedAttributeMap getApplicationMap()
```
    Description copied from interface: ExternalContext
    
    Provides access to the external application map, providing a storage for data local to the current user application and accessible to both internal and external SWF artifacts.
    
    Specified by:
    
    getApplicationMap in interface ExternalContext
    
    Returns:
    the mutable application attribute map
  - getCurrentUser
```
public java.security.Principal getCurrentUser()
```
    Description copied from interface: ExternalContext
    
    Provides access to the user's principal security object.
    
    Specified by:
    
    getCurrentUser in interface ExternalContext
    
    Returns:
    the user principal
  - getLocale
```
public java.util.Locale getLocale()
```
    Description copied from interface: ExternalContext
    
    Returns the client locale.
    
    Specified by:
    
    getLocale in interface ExternalContext
    
    Returns:
    the locale
  - getNativeContext
```
public java.lang.Object getNativeContext()
```
    Description copied from interface: ExternalContext
    
    Provides access to the context object for the current environment.
    
    Specified by:
    
    getNativeContext in interface ExternalContext
    
    Returns:
    the environment specific context object
  - getNativeRequest
```
public java.lang.Object getNativeRequest()
```
    Description copied from interface: ExternalContext
    
    Provides access to the request object for the current environment.
    
    Specified by:
    
    getNativeRequest in interface ExternalContext
    
    Returns:
    the environment specific request object.
  - getNativeResponse
```
public java.lang.Object getNativeResponse()
```
    Description copied from interface: ExternalContext
    
    Provides access to the response object for the current environment.
    
    Specified by:
    
    getNativeResponse in interface ExternalContext
    
    Returns:
    the environment specific response object.
  - isAjaxRequest
```
public boolean isAjaxRequest()
```
    Description copied from interface: ExternalContext
    
    Returns true if the current request is an asynchronous Ajax request.
    
    Specified by:
    
    isAjaxRequest in interface ExternalContext
    
    Returns:
    true if the current request is an Ajax request
  - getFlowExecutionUrl
```
public java.lang.String getFlowExecutionUrl(java.lang.String flowId,
                                   java.lang.String flowExecutionKey)
```
    Description copied from interface: ExternalContext
    
    Get a flow execution URL for the execution with the provided key. Typically used by response writers that write out references to the flow execution to support postback on a subsequent request. The URL returned is encoded.
    
    Specified by:
    
    getFlowExecutionUrl in interface ExternalContext
    
    Parameters:
    flowId - the flow definition id
    flowExecutionKey - the flow execution key
    
    Returns:
    the flow execution URL
  - getResponseWriter
```
public java.io.Writer getResponseWriter()
                                 throws java.lang.IllegalStateException
```
    Description copied from interface: ExternalContext
    
    Get a writer for writing out a response.
    
    Specified by:
    
    getResponseWriter in interface ExternalContext
    
    Returns:
    the writer
    
    Throws:
    
    java.lang.IllegalStateException - if the response has completed or is not allowed
  - isResponseAllowed
```
public boolean isResponseAllowed()
```
    Description copied from interface: ExternalContext
    
    Is a render response allowed to be written for this request? Always return false after a response has been completed. May return false before that to indicate a response is not allowed to be completed. For example, in a Portlet environment, render responses are only allowed in render requests.
    
    Specified by:
    
    isResponseAllowed in interface ExternalContext
    
    Returns:
    true if yes, false otherwise
  - isResponseComplete
```
public boolean isResponseComplete()
```
    Description copied from interface: ExternalContext
    Has the response been completed? Response complete status can be achieved by:
    - Writing out the response and calling ExternalContext.recordResponseComplete(), or
    - Calling one of the redirect request methods
    Specified by:
    
    isResponseComplete in interface ExternalContext
    
    Returns:
    true if yes, false otherwise
    See Also:
    ExternalContext.getResponseWriter(), ExternalContext.recordResponseComplete(), ExternalContext.requestFlowExecutionRedirect(), ExternalContext.requestFlowDefinitionRedirect(String, MutableAttributeMap), ExternalContext.requestExternalRedirect(String)
  - recordResponseComplete
```
public void recordResponseComplete()
```
    Description copied from interface: ExternalContext
    
    Called by flow artifacts such as View states and end states to indicate they handled the response, typically by writing out content to the response stream. Setting this flag allows this external context to know the response was handled, and that it not need to take additional response handling action itself.
    
    Specified by:
    
    recordResponseComplete in interface ExternalContext
  - isResponseCompleteFlowExecutionRedirect
```
public boolean isResponseCompleteFlowExecutionRedirect()
```
    Description copied from interface: ExternalContext
    
    Returns true if the response has been completed with flow execution redirect request.
    
    Specified by:
    
    isResponseCompleteFlowExecutionRedirect in interface ExternalContext
    
    Returns:
    true if a redirect response has been completed
    See Also:
    ExternalContext.isResponseComplete(), ExternalContext.requestFlowExecutionRedirect()
  - requestFlowExecutionRedirect
```
public void requestFlowExecutionRedirect()
                                  throws java.lang.IllegalStateException
```
    Description copied from interface: ExternalContext
    
    Request that a flow execution redirect be performed by the calling environment. Typically called from within a flow execution to request a refresh operation, usually to support "refresh after event processing" behavior. Calling this method also sets responseComplete status to true.
    
    Specified by:
    
    requestFlowExecutionRedirect in interface ExternalContext
    
    Throws:
    
    java.lang.IllegalStateException - if the response has completed
    See Also:
    ExternalContext.isResponseComplete()
  - requestFlowDefinitionRedirect
```
public void requestFlowDefinitionRedirect(java.lang.String flowId,
                                 MutableAttributeMap input)
                                   throws java.lang.IllegalStateException
```
    Description copied from interface: ExternalContext
    
    Request that a flow definition redirect be performed by the calling environment. Typically called from within a flow execution end state to request starting a new, independent execution of a flow in a chain-like manner. Calling this method also sets responseComplete status to true.
    
    Specified by:
    
    requestFlowDefinitionRedirect in interface ExternalContext
    
    Parameters:
    flowId - the id of the flow definition to redirect to
    input - input to pass the flow; this input is generally encoded the url to launch the flow
    
    Throws:
    
    java.lang.IllegalStateException - if the response has completed
    See Also:
    ExternalContext.isResponseComplete()
  - requestExternalRedirect
```
public void requestExternalRedirect(java.lang.String location)
                             throws java.lang.IllegalStateException
```
    Description copied from interface: ExternalContext
    
    Request a redirect to an arbitrary resource location. May not be supported in some environments. Calling this method also sets responseComplete status to true.
    
    Specified by:
    
    requestExternalRedirect in interface ExternalContext
    
    Parameters:
    location - the location of the resource to redirect to
    
    Throws:
    
    java.lang.IllegalStateException - if the response has completed
    See Also:
    ExternalContext.isResponseComplete()
  - requestRedirectInPopup
```
public void requestRedirectInPopup()
                            throws java.lang.IllegalStateException
```
    Description copied from interface: ExternalContext
    
    Request that the current redirect requested be sent to the client in a manner that causes the client to issue the redirect from a popup dialog. Only call this method after a redirect has been requested.
    
    Specified by:
    
    requestRedirectInPopup in interface ExternalContext
    
    Throws:
    
    java.lang.IllegalStateException - if a redirect has not been requested
    See Also:
    ExternalContext.requestFlowExecutionRedirect(), ExternalContext.requestFlowDefinitionRedirect(String, MutableAttributeMap), ExternalContext.requestExternalRedirect(String)
  - getFlowExecutionRedirectRequested
```
public boolean getFlowExecutionRedirectRequested()
```
    Returns the flag indicating if a flow execution redirect response has been requested by the flow.
  - getFlowDefinitionRedirectRequested
```
public boolean getFlowDefinitionRedirectRequested()
```
    Returns the flag indicating if a flow definition redirect response has been requested by the flow.
  - getFlowRedirectFlowId
```
public java.lang.String getFlowRedirectFlowId()
```
    Returns the id of the flow definition to redirect to. Only set when getFlowDefinitionRedirectRequested() returns true.
  - getFlowRedirectFlowInput
```
public MutableAttributeMap getFlowRedirectFlowInput()
```
    Returns the input to pass the flow definition through the redirect. Only set when getFlowDefinitionRedirectRequested() returns true.
  - getExternalRedirectRequested
```
public boolean getExternalRedirectRequested()
```
    Returns the flag indicating if an external redirect response has been requested by the flow.
  - getExternalRedirectUrl
```
public java.lang.String getExternalRedirectUrl()
```
    Returns the URL to redirect to. Only set if getExternalRedirectRequested() returns true.
  - getRedirectInPopup
```
public boolean getRedirectInPopup()
```
    If a redirect response has been requested, indicates if the redirect should be issued from a popup dialog.
  - getContext
```
protected javax.servlet.ServletContext getContext()
```
    Returns the servlet context.
  - getRequest
```
protected javax.servlet.http.HttpServletRequest getRequest()
```
    Returns the underlying HttpServletRequest.
  - getResponse
```
protected javax.servlet.http.HttpServletResponse getResponse()
```
    Returns the underlying HttpServletResponse.
  - getFlowUrlHandler
```
protected FlowUrlHandler getFlowUrlHandler()
```
    Returns the configured flow url handler.

Class ServletExternalContext

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ServletExternalContext

ServletExternalContext

Method Detail

setAjaxRequest

getContextPath

getRequestParameterMap

getRequestMap

getSessionMap

getGlobalSessionMap

getApplicationMap

getCurrentUser

getLocale

getNativeContext

getNativeRequest

getNativeResponse

isAjaxRequest

getFlowExecutionUrl

getResponseWriter

isResponseAllowed

isResponseComplete

recordResponseComplete

isResponseCompleteFlowExecutionRedirect

requestFlowExecutionRedirect

requestFlowDefinitionRedirect

requestExternalRedirect

requestRedirectInPopup

getFlowExecutionRedirectRequested

getFlowDefinitionRedirectRequested

getFlowRedirectFlowId

getFlowRedirectFlowInput

getExternalRedirectRequested

getExternalRedirectUrl

getRedirectInPopup

getContext

getRequest

getResponse

getFlowUrlHandler