C# Class Command.Context

Records the current context within which Commands are executed. A Context is like a session object; it holds the current set of live object instances on which commands will be invoked. The Context is also able to use the Factory registration information to create new object instances as required, provided they can be created from objects currently in the context.

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Public Properties

Property	Type	Description
MissingArgHandler	object>.Func

Protected Properties

Property	Type	Description
_context	List
_dependencyList	List
_log	log4net.ILog
_purgeList	List
_registry	Registry

Public Methods

Method	Description
Context ( Registry registry ) : System
Context ( Registry registry, object>.Func missingArgHandler ) : System
FindPathToType ( Type t, Command cmd ) : Stack	Determines the sequence of command invocations, property accesses, and constructor calls that are required to instantiate an object of the requested type, given the current state of the context.
GetSettings ( Type type ) : List	Returns the SettingAttributes for the specified type.
HasObject ( Type type ) : bool	Returns true if the Context currently contains an instance of the requested type.
Invoke ( string command, object>.Dictionary args ) : object	Invoke an instance of the named command, using the supplied arguments dictionary to obtain parameter values. If necessary, this will execute Factory constructors, properties, and commands to obtain the necessary source object on which to invoke the command.
Remove ( Type type ) : object	Removes the first object that is an instance of type.
Set ( object value ) : void	Sets an object in the context. Only a single object of a given type is permitted, so any existing object of this type is replaced.
Set ( object value, object dependency ) : void	Sets an object in the context. Only a single object of a given type is permitted, so any existing object of this type is replaced.
Verify ( ) : void	Verifies that all commands can be invoked successfully.
this ( Type type ) : object

Protected Methods

Method	Description
RemoveDependencies ( object val ) : void

Private Methods

Method	Description
ConvertSetting ( object val, ISetting setting ) : object
Instantiate ( Factory step, object>.Dictionary args ) : object
InvokeCommand ( Command cmd, object>.Dictionary args ) : object
InvokeConstructor ( ConstructorInfo ctor ) : object
LogSettingNameValue ( StringBuilder sb, string name, ISetting setting, object val ) : void
LogSettingValue ( StringBuilder sb, ISetting setting, object val ) : void
PrepareCommandArguments ( Command cmd, object>.Dictionary args, string &paramLog ) : object[]
PrepareSettingsCollectionArg ( Command cmd, CommandParameter param, object>.Dictionary args, StringBuilder sb ) : ISettingsCollection
PurgeSingleUseObjects ( ) : void

Method Details

Context() public method

public Context ( Registry registry ) : System
registry	Registry
return	System

Context() public method

public Context ( Registry registry, object>.Func missingArgHandler ) : System
registry	Registry
missingArgHandler	object>.Func
return	System

FindPathToType() public method

Determines the sequence of command invocations, property accesses, and constructor calls that are required to instantiate an object of the requested type, given the current state of the context.

Throws ContextException if an object of the desired type /// cannot be created from the current context. ///

public FindPathToType ( Type t, Command cmd ) : Stack
t	System.Type
cmd	Command
return	Stack

GetSettings() public method

Returns the SettingAttributes for the specified type.

public GetSettings ( Type type ) : List
type	System.Type
return	List

HasObject() public method

Returns true if the Context currently contains an instance of the requested type.

public HasObject ( Type type ) : bool
type	System.Type
return	bool

Invoke() public method

Invoke an instance of the named command, using the supplied arguments dictionary to obtain parameter values. If necessary, this will execute Factory constructors, properties, and commands to obtain the necessary source object on which to invoke the command.

public Invoke ( string command, object>.Dictionary args ) : object
command	string
args	object>.Dictionary
return	object

Remove() public method

Removes the first object that is an instance of type.

public Remove ( Type type ) : object
type	System.Type
return	object

RemoveDependencies() protected method

protected RemoveDependencies ( object val ) : void
val	object
return	void

Set() public method

Sets an object in the context. Only a single object of a given type is permitted, so any existing object of this type is replaced.

public Set ( object value ) : void
value	object
return	void

Set() public method

Sets an object in the context. Only a single object of a given type is permitted, so any existing object of this type is replaced.

public Set ( object value, object dependency ) : void
value	object
dependency	object
return	void

Verify() public method

Verifies that all commands can be invoked successfully.

public Verify ( ) : void
return	void

this() public method

public this ( Type type ) : object
type	System.Type
return	object

Property Details

MissingArgHandler public_oe property

public Func MissingArgHandler
return	object>.Func

_context protected_oe property

protected List
return	List

_dependencyList protected_oe property

protected Dictionary> _dependencyList
return	List

_log protected_oe static_oe property

protected static ILog,log4net _log
return	log4net.ILog

_purgeList protected_oe property

protected List
return	List

_registry protected_oe property

protected Registry,Command _registry
return	Registry