org.apache.struts2

## Class ActionContext

- java.lang.Object
- - org.apache.struts2.ActionContext

- All Implemented Interfaces:
    Serializable
  Direct Known Subclasses:
    ActionContext

      public class ActionContext
      extends Object
      implements Serializable

  The ActionContext is the context in which an `Action` is executed. Each context is basically a container of objects an action needs for execution like the session, parameters, locale, etc.

  The ActionContext is thread local which means that values stored in the ActionContext are unique per thread. See the `ThreadLocal` class for more information. The benefit of this is you don't need to worry about a user specific action context, you just get it:

  `ActionContext context = ActionContext.getContext();`

  Finally, because of the thread local usage you don't need to worry about making your actions thread safe.

  Author:
    Patrick Lightbody, Bill Lynch (docs)
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `ActionContext(Map<String,Object> context)` Creates a new ActionContext initialized with another context.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `ActionContext` | `bind()` Binds this context with the current thread
    `static ActionContext` | `bind(ActionContext actionContext)` Binds the provided context with the current thread
    `static void` | `clear()` Wipes out current ActionContext, use wisely!
    `static boolean` | `containsValueStack(Map<String,Object> context)`
    `boolean` | `equals(Object obj)`
    `Object` | `get(String key)` Returns a value that is stored in the current ActionContext by doing a lookup using the value's key.
    `ActionInvocation` | `getActionInvocation()` Gets the action invocation (the execution state).
    `ActionMapping` | `getActionMapping()` Gets ActionMapping associated with current action
    `String` | `getActionName()` Gets the name of the current Action.
    `Map<String,Object>` | `getApplication()` Returns a Map of the ServletContext when in a servlet environment or a generic application level Map otherwise.
    `Container` | `getContainer()` Sets the container for this request
    `static ActionContext` | `getContext()` Returns the ActionContext specific to the current thread.
    `Map<String,Object>` | `getContextMap()` Gets the context map.
    `Map<String,ConversionData>` | `getConversionErrors()` Gets the map of conversion errors which occurred when executing the action.
    `<T> T` | `getInstance(Class<T> type)`
    `Locale` | `getLocale()` Gets the Locale of the current action.
    `javax.servlet.jsp.PageContext` | `getPageContext()` Gets PageContext associated with current action
    `HttpParameters` | `getParameters()` Returns a Map of the HttpServletRequest parameters when in a servlet environment or a generic Map of parameters otherwise.
    `javax.servlet.ServletContext` | `getServletContext()` Gets ServletContext associated with current action
    `javax.servlet.http.HttpServletRequest` | `getServletRequest()` Gets ServletRequest associated with current action
    `javax.servlet.http.HttpServletResponse` | `getServletResponse()` Gets ServletResponse associated with current action
    `Map<String,Object>` | `getSession()` Gets the Map of HttpSession values when in a servlet environment or a generic session map otherwise.
    `ValueStack` | `getValueStack()` Gets the OGNL value stack.
    `int` | `hashCode()`
    `static ActionContext` | `of()` Creates a new ActionContext based on empty Map
    `static ActionContext` | `of(Map<String,Object> context)` Creates a new ActionContext based on passed in Map
    `void` | `put(String key, Object value)` Stores a value in the current ActionContext.
    `ActionContext` | `with(String key, Object value)` Adds arbitrary key to action context
    `ActionContext` | `withActionInvocation(ActionInvocation actionInvocation)` Sets the action invocation (the execution state).
    `ActionContext` | `withActionMapping(ActionMapping actionMapping)` Assigns ActionMapping to action context
    `ActionContext` | `withActionName(String actionName)` Sets the name of the current Action in the ActionContext.
    `ActionContext` | `withApplication(Map<String,Object> application)` Sets the action's application context.
    `ActionContext` | `withContainer(Container container)` Gets the container for this request
    `ActionContext` | `withConversionErrors(Map<String,ConversionData> conversionErrors)` Sets conversion errors which occurred when executing the action.
    `ActionContext` | `withExtraContext(Map<String,Object> extraContext)` Assigns an extra context map to action context
    `ActionContext` | `withLocale(Locale locale)` Sets the Locale for the current action.
    `ActionContext` | `withPageContext(javax.servlet.jsp.PageContext pageContext)` Assigns PageContext to action context
    `ActionContext` | `withParameters(HttpParameters parameters)` Sets the action parameters.
    `ActionContext` | `withServletContext(javax.servlet.ServletContext servletContext)` Assigns ServletContext to action context
    `ActionContext` | `withServletRequest(javax.servlet.http.HttpServletRequest request)` Assigns ServletRequest to action context
    `ActionContext` | `withServletResponse(javax.servlet.http.HttpServletResponse response)` Assigns ServletResponse to action context
    `ActionContext` | `withSession(Map<String,Object> session)` Sets a map of action session values.
    `ActionContext` | `withValueStack(ValueStack valueStack)` Sets the OGNL value stack.

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### ActionContext

          protected ActionContext(Map<String,Object> context)

      Creates a new ActionContext initialized with another context.
      Parameters:
        `context` - a context map.

  - ### Method Detail

    - #### of

          public static ActionContext of(Map<String,Object> context)

      Creates a new ActionContext based on passed in Map
      Parameters:
        `context` - a map with context values
      Returns:
        new ActionContext

    - #### of

          public static ActionContext of()

      Creates a new ActionContext based on empty Map
      Returns:
        new ActionContext

    - #### bind

          public static ActionContext bind(ActionContext actionContext)

      Binds the provided context with the current thread
      Parameters:
        `actionContext` - context to bind to the thread
      Returns:
        context which was bound to the thread

    - #### containsValueStack

          public static boolean containsValueStack(Map<String,Object> context)

    - #### bind

          public ActionContext bind()

      Binds this context with the current thread
      Returns:
        this context which was bound to the thread

    - #### clear

          public static void clear()

      Wipes out current ActionContext, use wisely!

    - #### getContext

          public static ActionContext getContext()

      Returns the ActionContext specific to the current thread.
      Returns:
        the ActionContext for the current thread, is never `null`.

    - #### withActionInvocation

          public ActionContext withActionInvocation(ActionInvocation actionInvocation)

      Sets the action invocation (the execution state).
      Parameters:
        `actionInvocation` - the action execution state.

    - #### getActionInvocation

          public ActionInvocation getActionInvocation()

      Gets the action invocation (the execution state).
      Returns:
        the action invocation (the execution state).

    - #### withApplication

          public ActionContext withApplication(Map<String,Object> application)

      Sets the action's application context.
      Parameters:
        `application` - the action's application context.

    - #### getApplication

          public Map<String,Object> getApplication()

      Returns a Map of the ServletContext when in a servlet environment or a generic application level Map otherwise.
      Returns:
        a Map of ServletContext or generic application level Map

    - #### getContextMap

          public Map<String,Object> getContextMap()

      Gets the context map.
      Returns:
        the context map.

    - #### withConversionErrors

          public ActionContext withConversionErrors(Map<String,ConversionData> conversionErrors)

      Sets conversion errors which occurred when executing the action.
      Parameters:
        `conversionErrors` - a Map of errors which occurred when executing the action.

    - #### getConversionErrors

          public Map<String,ConversionData> getConversionErrors()

      Gets the map of conversion errors which occurred when executing the action.
      Returns:
        the map of conversion errors which occurred when executing the action or an empty map if there were no errors.

    - #### withLocale

          public ActionContext withLocale(Locale locale)

      Sets the Locale for the current action.
      Parameters:
        `locale` - the Locale for the current action.

    - #### getLocale

          public Locale getLocale()

      Gets the Locale of the current action. If no locale was ever specified the platform's `default locale` is used.
      Returns:
        the Locale of the current action.

    - #### withActionName

          public ActionContext withActionName(String actionName)

      Sets the name of the current Action in the ActionContext.
      Parameters:
        `actionName` - the name of the current action.

    - #### getActionName

          public String getActionName()

      Gets the name of the current Action.
      Returns:
        the name of the current action.

    - #### withParameters

          public ActionContext withParameters(HttpParameters parameters)

      Sets the action parameters.
      Parameters:
        `parameters` - the parameters for the current action.

    - #### getParameters

          public HttpParameters getParameters()

      Returns a Map of the HttpServletRequest parameters when in a servlet environment or a generic Map of parameters otherwise.
      Returns:
        a Map of HttpServletRequest parameters or a multipart map when in a servlet environment, or a generic Map of parameters otherwise.

    - #### withSession

          public ActionContext withSession(Map<String,Object> session)

      Sets a map of action session values.
      Parameters:
        `session` - the session values.

    - #### getSession

          public Map<String,Object> getSession()

      Gets the Map of HttpSession values when in a servlet environment or a generic session map otherwise.
      Returns:
        the Map of HttpSession values when in a servlet environment or a generic session map otherwise.

    - #### withValueStack

          public ActionContext withValueStack(ValueStack valueStack)

      Sets the OGNL value stack.
      Parameters:
        `valueStack` - the OGNL value stack.

    - #### getValueStack

          public ValueStack getValueStack()

      Gets the OGNL value stack.
      Returns:
        the OGNL value stack.

    - #### withContainer

          public ActionContext withContainer(Container container)

      Gets the container for this request
      Parameters:
        `container` - The container

    - #### getContainer

          public Container getContainer()

      Sets the container for this request
      Returns:
        The container

    - #### getInstance

          public <T> T getInstance(Class<T> type)

    - #### get

          public Object get(String key)

      Returns a value that is stored in the current ActionContext by doing a lookup using the value's key.
      Parameters:
        `key` - the key used to find the value.
      Returns:
        the value that was found using the key or `null` if the key was not found.

    - #### put

          public void put(String key,
                          Object value)

      Stores a value in the current ActionContext. The value can be looked up using the key.
      Parameters:
        `key` - the key of the value.
        `value` - the value to be stored.

    - #### getServletContext

          public javax.servlet.ServletContext getServletContext()

      Gets ServletContext associated with current action
      Returns:
        current ServletContext

    - #### withServletContext

          public ActionContext withServletContext(javax.servlet.ServletContext servletContext)

      Assigns ServletContext to action context
      Parameters:
        `servletContext` - associated with current request
      Returns:
        ActionContext

    - #### getServletRequest

          public javax.servlet.http.HttpServletRequest getServletRequest()

      Gets ServletRequest associated with current action
      Returns:
        current ServletRequest

    - #### withServletRequest

          public ActionContext withServletRequest(javax.servlet.http.HttpServletRequest request)

      Assigns ServletRequest to action context
      Parameters:
        `request` - associated with current request
      Returns:
        ActionContext

    - #### getServletResponse

          public javax.servlet.http.HttpServletResponse getServletResponse()

      Gets ServletResponse associated with current action
      Returns:
        current ServletResponse

    - #### withServletResponse

          public ActionContext withServletResponse(javax.servlet.http.HttpServletResponse response)

      Assigns ServletResponse to action context
      Parameters:
        `response` - associated with current request
      Returns:
        ActionContext

    - #### getPageContext

          public javax.servlet.jsp.PageContext getPageContext()

      Gets PageContext associated with current action
      Returns:
        current PageContext

    - #### withPageContext

          public ActionContext withPageContext(javax.servlet.jsp.PageContext pageContext)

      Assigns PageContext to action context
      Parameters:
        `pageContext` - associated with current request
      Returns:
        ActionContext

    - #### getActionMapping

          public ActionMapping getActionMapping()

      Gets ActionMapping associated with current action
      Returns:
        current ActionMapping

    - #### withActionMapping

          public ActionContext withActionMapping(ActionMapping actionMapping)

      Assigns ActionMapping to action context
      Parameters:
        `actionMapping` - associated with current request
      Returns:
        ActionContext

    - #### withExtraContext

          public ActionContext withExtraContext(Map<String,Object> extraContext)

      Assigns an extra context map to action context
      Parameters:
        `extraContext` - to add to the current action context
      Returns:
        ActionContext

    - #### with

          public ActionContext with(String key,
                                    Object value)

      Adds arbitrary key to action context
      Parameters:
        `key` - a string
        `value` - an object
      Returns:
        ActionContext

    - #### equals

          public final boolean equals(Object obj)

      Overrides:
        `equals` in class `Object`

    - #### hashCode

          public final int hashCode()

      Overrides:
        `hashCode` in class `Object`

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