Package net.ssehub.easy.instantiation.core.model.expressions

Class ExpressionVersionRestriction

java.lang.Object

net.ssehub.easy.instantiation.core.model.expressions.ExpressionVersionRestriction

All Implemented Interfaces:

IVersionRestriction

Direct Known Subclasses:

ExpressionVersionRestriction, ExpressionVersionRestriction

public abstract class ExpressionVersionRestriction
extends java.lang.Object
implements IVersionRestriction

A version restriction based on expressions.

Author:

Holger Eichelberger

Nested Class Summary

Nested classes/interfaces inherited from interface net.ssehub.easy.basics.modelManagement.IVersionRestriction

IVersionRestriction.IVariableMapper

Field Summary

Fields

Modifier and Type	Field	Description
private Expression	expr
private VariableDeclaration	versionVariable

Constructor Summary

Constructors

Constructor	Description
ExpressionVersionRestriction(Expression expr, VariableDeclaration versionVariable)	Creates a new expression version restriction.

Method Summary

Modifier and Type	Method	Description
static Expression	createSingleRestriction(VariableDeclaration var, java.lang.String operator, Version version)	Creates a typical single restriction from the given variable (see #createRestrictionVars(String), the operator and the version.
void	emit(java.lang.Object context)	Emits the version restriction in terms of it's specification representation.
boolean	evaluate(IRestrictionEvaluationContext context, Version version)	Evaluates the restriction.
protected Expression	getExpression()	Returns the restriction expression.
protected VariableDeclaration	getVersionVariable()	Returns the version variable.
java.lang.String	toSpecification()	Turns the version restriction into it's specification representation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.ssehub.easy.basics.modelManagement.IVersionRestriction

copy, copy

Field Detail

expr

private Expression expr

versionVariable

private VariableDeclaration versionVariable

Constructor Detail

ExpressionVersionRestriction

public ExpressionVersionRestriction(Expression expr,
                                    VariableDeclaration versionVariable)
                             throws RestrictionEvaluationException

Creates a new expression version restriction.

Parameters:

expr - the version restriction expression

versionVariable - the variable representing the actual version of the project to be imported

Throws:

RestrictionEvaluationException - in case of type compliance problems

Method Detail

createSingleRestriction

public static Expression createSingleRestriction(VariableDeclaration var,
                                                 java.lang.String operator,
                                                 Version version)
                                          throws VilException

Creates a typical single restriction from the given variable (see #createRestrictionVars(String), the operator and the version.

Parameters:

var - the variable to use

operator - the operator

version - the version

Returns:

the expression

Throws:

VilException - in case of type problems

emit

public void emit(java.lang.Object context)

Description copied from interface: IVersionRestriction

Emits the version restriction in terms of it's specification representation.

Specified by:

emit in interface IVersionRestriction

Parameters:

context - the output context (interpreted by the respective implementation, e.g., an output visitor in order to continue with the actual indentation, may be null but then nothing is emitted)

toSpecification

public java.lang.String toSpecification()

Description copied from interface: IVersionRestriction

Turns the version restriction into it's specification representation.

Specified by:

toSpecification in interface IVersionRestriction

Returns:

the specification representation

evaluate

public boolean evaluate(IRestrictionEvaluationContext context,
                        Version version)
                 throws RestrictionEvaluationException

Description copied from interface: IVersionRestriction

Evaluates the restriction.

Specified by:

evaluate in interface IVersionRestriction

Parameters:

context - the output context (interpreted by the respective implementation, e.g., an output visitor in order to continue with the actual indentation, may be null but then false will always be the result)

version - the version (of the project) to be used for evaluation

Returns:

true if the version matches the restriction, false else

Throws:

RestrictionEvaluationException - in case of evaluation problems

getExpression

protected Expression getExpression()

Returns the restriction expression.

Returns:

the restriction expression

getVersionVariable

protected VariableDeclaration getVersionVariable()

Returns the version variable.

Returns:

the version variable