org.araneaframework.framework.container
Class StandardFlowContainerWidget

java.lang.Object
  org.araneaframework.core.BaseComponent
      org.araneaframework.core.BaseService
          org.araneaframework.core.BaseWidget
              org.araneaframework.core.BaseApplicationWidget
                  org.araneaframework.framework.container.StandardFlowContainerWidget

All Implemented Interfaces:

Serializable, Component, Composite, Composite.CompositeComponent, Composite.CompositeService, Composite.CompositeWidget, ApplicationComponent, ApplicationService, ApplicationWidget, FlowContext, FlowContextWidget, Service, Viewable, Viewable.ViewableComponent, Viewable.ViewableService, Viewable.ViewableWidget, Widget

Direct Known Subclasses:

ExceptionHandlingFlowContainerWidget, RootFlowContainerWidget

public class StandardFlowContainerWidget
extends BaseApplicationWidget
implements FlowContextWidget

A FlowContext where the flows are structured as a stack.

Author:

"Toomas Römer" , Jevgeni Kabanov (ekabanov at araneaframework dot org)

See Also:

Serialized Form

Nested Class Summary

protected static class	StandardFlowContainerWidget.CallFrame A widget, configurator and a handler are encapsulated into one logical structure, a call frame.
protected class	StandardFlowContainerWidget.CancelClosure
protected class	StandardFlowContainerWidget.FinishClosure
protected class	StandardFlowContainerWidget.ReplaceClosure
protected class	StandardFlowContainerWidget.ResetClosure
static class	StandardFlowContainerWidget.StandardTransitionHandler
protected class	StandardFlowContainerWidget.StartClosure

Nested classes/interfaces inherited from class org.araneaframework.core.BaseApplicationWidget

BaseApplicationWidget.CompositeImpl, BaseApplicationWidget.ViewableImpl, BaseApplicationWidget.ViewModel

Nested classes/interfaces inherited from class org.araneaframework.core.BaseWidget

BaseWidget.WidgetImpl

Nested classes/interfaces inherited from class org.araneaframework.core.BaseService

BaseService.ServiceImpl

Nested classes/interfaces inherited from class org.araneaframework.core.BaseComponent

BaseComponent.ComponentImpl

Nested classes/interfaces inherited from interface org.araneaframework.framework.FlowContext

FlowContext.Configurator, FlowContext.Handler, FlowContext.TransitionHandler

Nested classes/interfaces inherited from interface org.araneaframework.Widget

Widget.Interface

Nested classes/interfaces inherited from interface org.araneaframework.core.ApplicationWidget

ApplicationWidget.WidgetViewModel

Nested classes/interfaces inherited from interface org.araneaframework.core.ApplicationService

ApplicationService.ServiceViewModel

Nested classes/interfaces inherited from interface org.araneaframework.core.ApplicationComponent

ApplicationComponent.ComponentViewModel

Nested classes/interfaces inherited from interface org.araneaframework.Composite

Composite.CompositeComponent, Composite.CompositeService, Composite.CompositeWidget

Nested classes/interfaces inherited from interface org.araneaframework.Viewable

Viewable.ViewableComponent, Viewable.ViewableService, Viewable.ViewableWidget

Nested classes/interfaces inherited from interface org.araneaframework.Composite

Composite.CompositeComponent, Composite.CompositeService, Composite.CompositeWidget

Nested classes/interfaces inherited from interface org.araneaframework.Viewable

Viewable.ViewableComponent, Viewable.ViewableService, Viewable.ViewableWidget

Nested classes/interfaces inherited from interface org.araneaframework.Composite

Composite.CompositeComponent, Composite.CompositeService, Composite.CompositeWidget

Nested classes/interfaces inherited from interface org.araneaframework.Viewable

Viewable.ViewableComponent, Viewable.ViewableService, Viewable.ViewableWidget

Field Summary

protected LinkedList	callStack The stack of all the calls.
protected boolean	finishable
protected Widget	top The top callable widget.

Fields inherited from class org.araneaframework.core.BaseService

currentInputData, currentOutputData

Fields inherited from interface org.araneaframework.framework.FlowContext

TRANSITION_CANCEL, TRANSITION_FINISH, TRANSITION_REPLACE, TRANSITION_RESET, TRANSITION_START

Fields inherited from interface org.araneaframework.core.ApplicationWidget

EVENT_HANDLER_ID_KEY, EVENT_PARAMETER_KEY, EVENT_PATH_KEY

Fields inherited from interface org.araneaframework.core.ApplicationService

ACTION_HANDLER_ID_KEY, ACTION_PARAMETER_KEY, ACTION_PATH_KEY

Constructor Summary

StandardFlowContainerWidget()

StandardFlowContainerWidget(Widget topWidget)
Constructs a StandardFlowContainerWidget with topWidget being the first flow on the top of flow stack.

Method Summary

protected void	addFrameWidget(StandardFlowContainerWidget.CallFrame frame) Activates the widget represented by the StandardFlowContainerWidget.CallFrame.
void	addNestedEnvironmentEntry(ApplicationWidget scope, Object entryId, Object envEntry) Adds an environment entry that is visible in all subflows.
void	cancel() Finishes the current flow passing control back to the calling flow.
protected void	destroy() Destroy callback.
protected void	doCancel()
protected void	doFinish(Object returnValue)
protected void	doReplace(Widget flow, FlowContext.Configurator configurator)
protected void	doReset(EnvironmentAwareCallback callback)
protected void	doStart(Widget flow, FlowContext.Configurator configurator, FlowContext.Handler handler)
protected void	doTransition(FlowContext.TransitionHandler transitionHandler, int transitionType, org.apache.commons.collections.Closure closure)
void	finish(Object returnValue) Finishes the current flow passing control back to the calling flow.
protected StandardFlowContainerWidget.CallFrame	getActiveCallFrame()
Widget	getActiveFlow()
protected LinkedList	getCallStack()
protected Environment	getChildWidgetEnvironment() Returns the widget's Environment by default.
FlowContext.TransitionHandler	getTransitionHandler() Returns currently active FlowContext.TransitionHandler.
protected void	init() Init callback.
boolean	isNested() Returns whether the current flow is nested, that is has a caller flow.
protected StandardFlowContainerWidget.CallFrame	makeCallFrame(Widget callable, FlowContext.Configurator configurator, FlowContext.Handler handler, StandardFlowContainerWidget.CallFrame previous) Returns a new CallFrame constructed of the callable, configurator and handler.
protected void	putLocalEnvironmentEntries(Map nestedEnvironmentEntries)
protected void	render(OutputData output) Invokes render on the top frame on the stack of callframes.
void	replace(Widget flow) Destroys the current flow and starts a new one.
void	replace(Widget flow, FlowContext.Configurator configurator) Destroys the current flow and starts a new one.
void	reset(EnvironmentAwareCallback callback) Resets all currently running flows and calls the callback allowing to start new flows.
void	setFinishable(boolean finishable) Determines whether this StandardFlowContainerWidget will ever return control to FlowContext higher in the Component hierarchy.
void	setTop(Widget topWidget)
void	setTransitionHandler(FlowContext.TransitionHandler transitionHandler) Sets the FlowContext.TransitionHandler which performs the flow navigation.
void	start(Widget flow) Starts a new nested subflow.
void	start(Widget flow, FlowContext.Configurator configurator, FlowContext.Handler handler) Starts a new nested subflow, that can be configured using the configurator.
void	start(Widget flow, FlowContext.Handler handler) Starts a new nested subflow.

Methods inherited from class org.araneaframework.core.BaseApplicationWidget

_getComposite, _getViewable, action, addActionListener, addEventListener, addWidget, addWidget, clearActionListeners, clearEventlisteners, clearGlobalEventListener, disableWidget, enableWidget, event, getActionId, getChildEnvironment, getChildren, getEnvironment, getEventId, getViewModel, getWidget, handleAction, handleEvent, handleUpdate, propagate, putViewData, putViewDataOnce, removeActionListener, removeEventListener, removeViewData, removeWidget, setGlobalEventListener, update

Methods inherited from class org.araneaframework.core.BaseWidget

_getWidget, getInputData, getOutputData, handleWidgetException

Methods inherited from class org.araneaframework.core.BaseService

_getService, handleServiceException

Methods inherited from class org.araneaframework.core.BaseComponent

_addComponent, _addComponent, _checkCall, _disableComponent, _enableComponent, _endCall, _endWaitingCall, _getChildren, _getComponent, _getDisabledChildren, _propagate, _relocateComponent, _removeComponent, _setEnvironment, _setScope, _startCall, _startWaitingCall, _strictCheckCall, _strictStartCall, _waitNoCall, disable, enable, getScope, handleException, isAlive, isDead, isInitialized

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.araneaframework.Widget

_getWidget

Methods inherited from interface org.araneaframework.Service

_getService

Methods inherited from interface org.araneaframework.Component

_getComponent, getEnvironment, getScope, isAlive

Field Detail

callStack

protected LinkedList callStack

The stack of all the calls.

top

protected Widget top

The top callable widget.

finishable

protected boolean finishable

Constructor Detail

StandardFlowContainerWidget

public StandardFlowContainerWidget(Widget topWidget)

Constructs a StandardFlowContainerWidget with topWidget being the first flow on the top of flow stack.

StandardFlowContainerWidget

public StandardFlowContainerWidget()

Method Detail

setTop

public void setTop(Widget topWidget)

setFinishable

public void setFinishable(boolean finishable)

Determines whether this StandardFlowContainerWidget will ever return control to FlowContext higher in the Component hierarchy. If such FlowContext exists and finishable is set to true, this StandardFlowContainerWidget will return control to it when last running flow inside it is finished (FlowContext.finish(Object)) or canceled (FlowContext.cancel()). Default is true.

Parameters:

finishable -

Since:

1.1

start

public void start(Widget flow)

Description copied from interface: FlowContext

Starts a new nested subflow. Current flow becomes inactive untils subflow calls FlowContext.finish(Object) or FlowContext.cancel().

Specified by:

start in interface FlowContext

start

public void start(Widget flow,
                  FlowContext.Handler handler)

Description copied from interface: FlowContext

Starts a new nested subflow. Current flow becomes inactive untils subflow calls FlowContext.finish(Object) or FlowContext.cancel(). FlowContext.Handler allows to receive notification, when the subflow ends execution.

Specified by:

start in interface FlowContext

start

public void start(Widget flow,
                  FlowContext.Configurator configurator,
                  FlowContext.Handler handler)

Description copied from interface: FlowContext

Starts a new nested subflow, that can be configured using the configurator. Current flow becomes inactive untils subflow calls FlowContext.finish(Object) or FlowContext.cancel(). FlowContext.Handler allows to receive notification, when the subflow ends execution.

Specified by:

start in interface FlowContext

replace

public void replace(Widget flow)

Description copied from interface: FlowContext

Destroys the current flow and starts a new one. When the new flow will end execution it will return control to the caller of the current flow (if there is one).

Specified by:

replace in interface FlowContext

replace

public void replace(Widget flow,
                    FlowContext.Configurator configurator)

Description copied from interface: FlowContext

Destroys the current flow and starts a new one. When the new flow ends execution it will return control to the caller of the current flow (if there is one). Started subflow can be configured using the configurator.

Specified by:

replace in interface FlowContext

finish

public void finish(Object returnValue)

Description copied from interface: FlowContext

Finishes the current flow passing control back to the calling flow. Optionally may return some value that can be interpreted by the calling flow as the result of the call.

Specified by:

finish in interface FlowContext

cancel

public void cancel()

Description copied from interface: FlowContext

Finishes the current flow passing control back to the calling flow. Should be interpreted by the calling flow as a unsuccessful return.

Specified by:

cancel in interface FlowContext

reset

public void reset(EnvironmentAwareCallback callback)

Description copied from interface: FlowContext

Resets all currently running flows and calls the callback allowing to start new flows. Useful e.g. in a menu, when selecting a new menu item and reseting the old stack.

Specified by:

reset in interface FlowContext

getTransitionHandler

public FlowContext.TransitionHandler getTransitionHandler()

Description copied from interface: FlowContext

Returns currently active FlowContext.TransitionHandler.

Specified by:

getTransitionHandler in interface FlowContext

setTransitionHandler

public void setTransitionHandler(FlowContext.TransitionHandler transitionHandler)

Description copied from interface: FlowContext

Sets the FlowContext.TransitionHandler which performs the flow navigation.

Specified by:

setTransitionHandler in interface FlowContext

addNestedEnvironmentEntry

public void addNestedEnvironmentEntry(ApplicationWidget scope,
                                      Object entryId,
                                      Object envEntry)

Description copied from interface: FlowContext

Adds an environment entry that is visible in all subflows.

Specified by:

addNestedEnvironmentEntry in interface FlowContext

isNested

public boolean isNested()

Description copied from interface: FlowContext

Returns whether the current flow is nested, that is has a caller flow.

Specified by:

isNested in interface FlowContext

init

protected void init()
             throws Exception

Description copied from class: BaseComponent

Init callback. Gets called when the component is initilized.

Overrides:

init in class BaseComponent

Throws:

Exception - Any runtime exception that may occur.

destroy

protected void destroy()
                throws Exception

Description copied from class: BaseComponent

Destroy callback. Gets called when the component is destroyed.

Overrides:

destroy in class BaseComponent

Throws:

Exception - Any runtime exception that may occur.

render

protected void render(OutputData output)
               throws Exception

Invokes render on the top frame on the stack of callframes.

Overrides:

render in class BaseApplicationWidget

Throws:

Exception

putLocalEnvironmentEntries

protected void putLocalEnvironmentEntries(Map nestedEnvironmentEntries)

getChildWidgetEnvironment

protected Environment getChildWidgetEnvironment()
                                         throws Exception

Description copied from class: BaseApplicationWidget

Returns the widget's Environment by default. Usually overridden.

Overrides:

getChildWidgetEnvironment in class BaseApplicationWidget

Throws:

Exception

makeCallFrame

protected StandardFlowContainerWidget.CallFrame makeCallFrame(Widget callable,
                                                              FlowContext.Configurator configurator,
                                                              FlowContext.Handler handler,
                                                              StandardFlowContainerWidget.CallFrame previous)

Returns a new CallFrame constructed of the callable, configurator and handler.

getActiveCallFrame

protected StandardFlowContainerWidget.CallFrame getActiveCallFrame()

getActiveFlow

public Widget getActiveFlow()

Since:

1.1

addFrameWidget

protected void addFrameWidget(StandardFlowContainerWidget.CallFrame frame)

Activates the widget represented by the StandardFlowContainerWidget.CallFrame.

Since:

1.1

doTransition

protected void doTransition(FlowContext.TransitionHandler transitionHandler,
                            int transitionType,
                            org.apache.commons.collections.Closure closure)

Since:

1.1

doReset

protected void doReset(EnvironmentAwareCallback callback)

Since:

1.1

doStart

protected void doStart(Widget flow,
                       FlowContext.Configurator configurator,
                       FlowContext.Handler handler)

Since:

1.1

doFinish

protected void doFinish(Object returnValue)

Since:

1.1

doCancel

protected void doCancel()

Since:

1.1

doReplace

protected void doReplace(Widget flow,
                         FlowContext.Configurator configurator)

Since:

1.1

getCallStack

protected LinkedList getCallStack()