Represents the state machine. This maintains the context in which the state machine runs. More...

Inheritance diagram for StateContext_Class:

Collaboration diagram for StateContext_Class:

Public Member Functions
string	RemoveComments (string text)
	Entry point for callers to filter text. Removes C++-style line and block comments from the text.

char	GetNextCharacter ()
	Get the next character from the input.

void	OutputCharacter (char character)
	Write the character to the context. This is how the parser accumulates the filtered text.

Private Member Functions
void	_SetNextState (CurrentState newState)
	Helper method to transition the state machine to the specified state. Does nothing if the new state is the same as the old state. Instantiates the state class the first time the state class is needed.

char IStateContext.	GetNextCharacter ()
	Retrieve the next character from the input.

void IStateContext.	OutputCharacter (char character)
	Save the character to the accumulation of the filtered text.

Private Attributes
string	_inputText = string.Empty
	The text to be filtered.

int	_textIndex = 0
	Index into the text to be filtered.

StringBuilder	_outputText = new StringBuilder()
	The results of the filtering.

Dictionary< CurrentState, IStateBehavior >	_stateBehaviors = new Dictionary<CurrentState, IStateBehavior>()
	Maps values from the CurrentState enumeration to instances of the IStateBehavior representing the behavior for that state.

CurrentState	_currentState
	The current state of the machine.

IStateBehavior	_currentStateBehavior = new State_NormalText()
	The current behavior (that is, a reference to the state behavior class) for the current state.

Detailed Description

Represents the state machine. This maintains the context in which the state machine runs.

To use:

StateContext_Class filterContext = new StateContext_Class();

string filteredText = filterContext.RemoveComments(textToFilter);

textToFilter

static const char * textToFilter

Definition: State_Exercise.c:52

DesignPatternExamples_csharp.StateContext_Class

Represents the state machine. This maintains the context in which the state machine runs.

Definition: State_Class.cs:696

DesignPatternExamples_csharp.StateContext_Class.RemoveComments

string RemoveComments(string text)

Entry point for callers to filter text. Removes C++-style line and block comments from the text.

Definition: State_Class.cs:769

Definition at line 695 of file State_Class.cs.

Member Function Documentation

◆ _SetNextState()

void _SetNextState ( CurrentState newState )

inlineprivate

Helper method to transition the state machine to the specified state. Does nothing if the new state is the same as the old state. Instantiates the state class the first time the state class is needed.

Parameters

newState A value from the CurrentState enumeration indicating the state to which to transition.

Definition at line 742 of file State_Class.cs.

References StateContext_Class._currentState, StateContext_Class._currentStateBehavior, StateContext_Class._stateBehaviors, and State_Factory.CreateState().

Referenced by StateContext_ClassImpl.RemoveComments(), and StateContext_Class.RemoveComments().