Package net.ssehub.easy.basics.modelManagement

Interface IRestrictionEvaluationContext

public interface IRestrictionEvaluationContext

Defines the evaluation context for version restrictions. Before setting values for variables, startEvaluation() shall be called by IVersionRestriction.evaluate(IRestrictionEvaluationContext, Version). unsetValue(IVariable) shall be called before ending the evaluation to clean up the variable binding. Finally IVersionRestriction.evaluate(IRestrictionEvaluationContext, Version) shall call endEvaluation(Object).

Author:

Holger Eichelberger

Method Summary

Modifier and Type	Method	Description
void	endEvaluation(Object processor)	Notifies the context about the end of the evaluation.
void	setValue(IVariable variable, Version version)	Defines the value for the given variable in this context.
Object	startEvaluation()	Notifies the context about starting the evaluation.
void	unsetValue(IVariable variable)	Unsets the value for the given variable.

Method Details

setValue

void setValue(IVariable variable,
 Version version)
       throws RestrictionEvaluationException

Defines the value for the given variable in this context. May imply that the given variable is added to the context if adequate.

Parameters:

variable - the variable to be defined

version - the actual value

Throws:

RestrictionEvaluationException - in case that setting the variable fails, e.g., due to type conflicts

unsetValue

void unsetValue(IVariable variable)
         throws RestrictionEvaluationException

Unsets the value for the given variable. May imply that the variable is removed from the context if adequate.

Parameters:

variable - the variable to be unset

Throws:

RestrictionEvaluationException - in case that setting the variable fails, e.g., due to type conflicts

startEvaluation

Object startEvaluation()
                throws RestrictionEvaluationException

Notifies the context about starting the evaluation.

Returns:

returns the evaluation processor

Throws:

RestrictionEvaluationException - in case that a sub context cannot be created

endEvaluation

void endEvaluation(Object processor)
            throws RestrictionEvaluationException

Notifies the context about the end of the evaluation.

Parameters:

processor - the evaluation processor for release

Throws:

RestrictionEvaluationException - in case that a sub context cannot be removed