ActionContext serves as a kind of shared memory context, or "blackboard", for Actions that work together to complete a task. ActionContext works as a typed name/value pair, with only one value allowed per name. More...

Inheritance diagram for RAIN.Action.ActionContext:

Public Member Functions
void	AddDependency (string itemName, string dependsOnItemName)
	Adds a dependency between itemName and dependsOnItemName. Whenever "dependsOnItemName" changes in the ActionContext, itemName will be removed.
void	RemoveDependency (string itemName, string dependsOnItemName)
	Removes a dependeny previously added between itemName and dependsOnItemName.
void	ClearDependencies ()
	Remove all tracked dependencies.
virtual T	GetContextItem< T > (string itemName)
	GetContextItem retrieves a value from the ActionContext based on its key itemName.
void	AddContextItem< T > (string itemName, T value, bool replaceIfExists)
	AddContextItem adds the value to the context associated with the key itemName. If a key/value pair with key itemName already exists in the ActionContext, it is replaced with the new value/Type only if replaceIfExists is true. If there are any other context items dependent on itemName, they are removed from the ActionContext.
void	SetContextItem< T > (string itemName, T value)
	SetContextItem adds the value to the context associated with the key itemName. If a key/value pair with key itemName already exists in the ActionContext, it is replaced with the new value/Type. If there are any other context items dependent on itemName, they are removed from the ActionContext.
void	AddContextItem< T > (string itemName, T value)
	AddContextItem adds the value to the context associated with the key itemName. If a key/value pair with key itemName already exists in the ActionContext, it is replaced with the new value/Type. If there are any other context items dependent on itemName, they are removed from the ActionContext.
void	RemoveContextItem (string itemName)
	Remove an item from the ActionContext. If there are any other context items dependent on itemName, they are removed from the ActionContext.
virtual bool	ContextItemExists (string itemName)
	Check to see if any item exists with the given itemName.
void	Assign (string toItemName, string fromItemName)
	Assign will retrieve the value of fromItemName and assign it to toItemNAme If fromItemName is not in the context, this is a noop.
void	Clear ()
	Clear will reset the ActionContext to an empty state, with no current key/value pairs. Dependencies are retained.

Detailed Description

ActionContext serves as a kind of shared memory context, or "blackboard", for Actions that work together to complete a task. ActionContext works as a typed name/value pair, with only one value allowed per name.

ActionContexts may define dependencies betwen variables, which cause dependent variables to be removed from the context whenever its corresponding variable changes.

Member Function Documentation

void RAIN.Action.ActionContext.AddContextItem< T >	(	string	itemName,
		T	value,
		bool	replaceIfExists
	)

AddContextItem adds the value to the context associated with the key itemName. If a key/value pair with key itemName already exists in the ActionContext, it is replaced with the new value/Type only if replaceIfExists is true. If there are any other context items dependent on itemName, they are removed from the ActionContext.

Template Parameters:

T	The type of the value being added

Parameters:

itemName	The key to associate with the value
value	The value to store
replaceIfExists	if false, only add if the value doesn't already exists

void RAIN.Action.ActionContext.AddContextItem< T >	(	string	itemName,
		T	value
	)

AddContextItem adds the value to the context associated with the key itemName. If a key/value pair with key itemName already exists in the ActionContext, it is replaced with the new value/Type. If there are any other context items dependent on itemName, they are removed from the ActionContext.

Template Parameters:

T	The type of the value being added

Parameters:

itemName	The key to associate with the value
value	The value to store

void RAIN.Action.ActionContext.AddDependency	(	string	itemName,
		string	dependsOnItemName
	)

Adds a dependency between itemName and dependsOnItemName. Whenever "dependsOnItemName" changes in the ActionContext, itemName will be removed.

Parameters:

itemName	The key of the key value pair to remove on a dependency change
dependsOnItemName	The key of the key value pair variable to watch for changes

void RAIN.Action.ActionContext.Assign	(	string	toItemName,
		string	fromItemName
	)

Assign will retrieve the value of fromItemName and assign it to toItemNAme If fromItemName is not in the context, this is a noop.

Parameters:

toItemName	item to assign to
fromItemName	item to retrieve value from

void RAIN.Action.ActionContext.Clear ( )

Clear will reset the ActionContext to an empty state, with no current key/value pairs. Dependencies are retained.

void RAIN.Action.ActionContext.ClearDependencies ( )

Remove all tracked dependencies.

virtual bool RAIN.Action.ActionContext.ContextItemExists ( string itemName ) [virtual]

Check to see if any item exists with the given itemName.

Parameters:

itemName The key to search for

Returns:: true if any item exists with key itemName, false otherwise

Reimplemented in RAIN.Action.NestedActionContext.

virtual T RAIN.Action.ActionContext.GetContextItem< T > ( string itemName ) [virtual]

GetContextItem retrieves a value from the ActionContext based on its key itemName.

Template Parameters:

T	The Type of the item to retrieve

Parameters:

itemName The Name of the item to retrieve

Returns:: If a value is found of type T with key name itemName, that value is returned. If a value is found matching itemName but of a different type, null is returned. If the itemName does not exist in the context, null is returned.

Reimplemented in RAIN.Action.NestedActionContext.

void RAIN.Action.ActionContext.RemoveContextItem ( string itemName )

Remove an item from the ActionContext. If there are any other context items dependent on itemName, they are removed from the ActionContext.

Parameters:

itemName The name of the item to remove

void RAIN.Action.ActionContext.RemoveDependency	(	string	itemName,
		string	dependsOnItemName
	)

Removes a dependeny previously added between itemName and dependsOnItemName.

Parameters:

itemName	the itemName to match
dependsOnItemName	the dependsOnItemName to match

void RAIN.Action.ActionContext.SetContextItem< T >	(	string	itemName,
		T	value
	)

SetContextItem adds the value to the context associated with the key itemName. If a key/value pair with key itemName already exists in the ActionContext, it is replaced with the new value/Type. If there are any other context items dependent on itemName, they are removed from the ActionContext.

Template Parameters:

T	The type of the value being added

Parameters:

itemName	The key to associate with the value
value	The value to store

Public Member Functions

Detailed Description

Member Function Documentation