com.opensymphony.xwork
Class DefaultActionInvocation

java.lang.Object
  com.opensymphony.xwork.DefaultActionInvocation

All Implemented Interfaces:

ActionInvocation, Serializable

public class DefaultActionInvocation

extends Object

implements ActionInvocation

The Default ActionInvocation implementation

Version:

$Revision: 999 $

Author:

Rainer Hermanns

See Also:

DefaultActionProxy, Serialized Form

Field Summary

protected Object	action
protected boolean	executed
protected Map	extraContext
protected Iterator	interceptors
protected ActionContext	invocationContext
static com.uwyn.rife.continuations.ContinuationManager	m
protected List	preResultListeners
protected ActionProxy	proxy
protected boolean	pushAction
protected Result	result
protected String	resultCode
protected OgnlValueStack	stack

Constructor Summary

protected	DefaultActionInvocation(ActionProxy proxy)
protected	DefaultActionInvocation(ActionProxy proxy, Map extraContext)
protected	DefaultActionInvocation(ActionProxy proxy, Map extraContext, boolean pushAction)

Method Summary

void	addPreResultListener(PreResultListener listener) Register a com.opensymphony.xwork.interceptor.PreResultListener to be notified after the Action is executed and before the Result is executed.
protected void	createAction(Map contextMap)
protected Map	createContextMap()
Result	createResult()
Object	getAction() Get the Action associated with this ActionInvocation
ActionContext	getInvocationContext() Gets the ActionContext associated with this ActionInvocation.
ActionProxy	getProxy() Get the ActionProxy holding this ActionInvocation
Result	getResult() If the DefaultActionInvocation has been executed before and the Result is an instance of ActionChainResult, this method will walk down the chain of ActionChainResults until it finds a non-chain result, which will be returned.
String	getResultCode() Gets the result code returned from this ActionInvocation
OgnlValueStack	getStack()
String	invoke() Invokes the next step in processing this ActionInvocation.
protected String	invokeAction(Object action, ActionConfig actionConfig)
String	invokeActionOnly() Invokes only the action (not interceptors or results).
boolean	isExecuted()
void	setResultCode(String resultCode) Sets the result code, possibly overriding the one returned by the action.

Methods inherited from class java.lang.Object

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

Field Detail

m

public static com.uwyn.rife.continuations.ContinuationManager m

action

protected Object action

proxy

protected ActionProxy proxy

preResultListeners

protected List preResultListeners

extraContext

protected Map extraContext

invocationContext

protected ActionContext invocationContext

interceptors

protected Iterator interceptors

stack

protected OgnlValueStack stack

result

protected Result result

resultCode

protected String resultCode

executed

protected boolean executed

pushAction

protected boolean pushAction

Constructor Detail

DefaultActionInvocation

protected DefaultActionInvocation(ActionProxy proxy)
                           throws Exception

DefaultActionInvocation

protected DefaultActionInvocation(ActionProxy proxy,
                                  Map extraContext)
                           throws Exception

DefaultActionInvocation

protected DefaultActionInvocation(ActionProxy proxy,
                                  Map extraContext,
                                  boolean pushAction)
                           throws Exception

Method Detail

getAction

public Object getAction()

Description copied from interface: ActionInvocation

Get the Action associated with this ActionInvocation

Specified by:

getAction in interface ActionInvocation

isExecuted

public boolean isExecuted()

Specified by:

isExecuted in interface ActionInvocation

Returns:

whether this ActionInvocation has executed before. This will be set after the Action and the Result have executed.

getInvocationContext

public ActionContext getInvocationContext()

Description copied from interface: ActionInvocation

Gets the ActionContext associated with this ActionInvocation. The ActionProxy is responsible for setting this ActionContext onto the ThreadLocal before invoking the ActionInvocation and resetting the old ActionContext afterwards.

Specified by:

getInvocationContext in interface ActionInvocation

getProxy

public ActionProxy getProxy()

Description copied from interface: ActionInvocation

Get the ActionProxy holding this ActionInvocation

Specified by:

getProxy in interface ActionInvocation

getResult

public Result getResult()
                 throws Exception

If the DefaultActionInvocation has been executed before and the Result is an instance of ActionChainResult, this method will walk down the chain of ActionChainResults until it finds a non-chain result, which will be returned. If the DefaultActionInvocation's result has not been executed before, the Result instance will be created and populated with the result params.

Specified by:

getResult in interface ActionInvocation

Returns:

a Result instance

Throws:

Exception

getResultCode

public String getResultCode()

Description copied from interface: ActionInvocation

Gets the result code returned from this ActionInvocation

Specified by:

getResultCode in interface ActionInvocation

setResultCode

public void setResultCode(String resultCode)

Description copied from interface: ActionInvocation

Sets the result code, possibly overriding the one returned by the action.

The "intended" purpose of this method is to allow PreResultListeners to override the result code returned by the Action.

If this method is used before the Action executes, the Action's returned result code will override what was set. However the Action could (if specifically coded to do so) inspect the ActionInvocation to see that someone "upstream" (e.g. an Interceptor) had suggested a value as the result, and it could therefore return the same value itself.

If this method is called between the Action execution and the Result execution, then the value set here will override the result code the action had returned. Creating an Interceptor that implements PreResultListener will give you this oportunity.

If this method is called after the Result has been executed, it will have the effect of raising an exception.

Specified by:

setResultCode in interface ActionInvocation

See Also:

ActionInvocation.isExecuted()

getStack

public OgnlValueStack getStack()

Specified by:

getStack in interface ActionInvocation

Returns:

the ValueStack associated with this ActionInvocation

addPreResultListener

public void addPreResultListener(PreResultListener listener)

Register a com.opensymphony.xwork.interceptor.PreResultListener to be notified after the Action is executed and before the Result is executed. The ActionInvocation implementation must guarantee that listeners will be called in the order in which they are registered. Listener registration and execution does not need to be thread-safe.

Specified by:

addPreResultListener in interface ActionInvocation

Parameters:

listener -

createResult

public Result createResult()
                    throws Exception

Throws:

Exception

invoke

public String invoke()
              throws Exception

Description copied from interface: ActionInvocation

Invokes the next step in processing this ActionInvocation. If there are more Interceptors, this will call the next one. If Interceptors choose not to short-circuit ActionInvocation processing and return their own return code, they will call invoke() to allow the next Interceptor to execute. If there are no more Interceptors to be applied, the Action is executed. If the ActionProxy getExecuteResult() method returns true, the Result is also executed.

Specified by:

invoke in interface ActionInvocation

Throws:

Exception

invokeActionOnly

public String invokeActionOnly()
                        throws Exception

Description copied from interface: ActionInvocation

Invokes only the action (not interceptors or results). This is useful in rare situations where advanced usage with the interceptor/action/result workflow is being manipulated for certain functionality. Specifically, WebWork's execAndWait interceptor takes advantage of this method.

Specified by:

invokeActionOnly in interface ActionInvocation

Throws:

Exception

createAction

protected void createAction(Map contextMap)

createContextMap

protected Map createContextMap()

invokeAction

protected String invokeAction(Object action,
                              ActionConfig actionConfig)
                       throws Exception

Throws:

Exception