FeatureIDE: Background

Thomas Thum, Jens MeinickeMarch 4, 2015

Feature-Oriented Programming (FOP)

I Introduced 1997 by Christian PrehoferI Based on Object-Oriented ProgrammingI Features realize functionalitiesI Features are cross-cutting to objectsI Features modularize fragments from certain classesI Fragment contains some methods/fields of a class belonging

to one functionalityI Goals: code traceability, software customization

Thomas Thum, Jens Meinicke FeatureIDE: Background 2

FOP ExampleKästner, Apel, Saake EPMD – Folie 6-48

Komposition durch Überlagerung von Bäumen

package util;class Calc {

int e0 = 0, e1 = 0, e2 = 0;

void enter(int val) {e2 = e1; e1 = e0; e0 = val;

}void clear() { e0 = e1 = e2 = 0;

}String top() {return String.

valueOf(e0);}

}

package util;class Calc {

void add() {e0 = e1 + e0; e1 = e2;

}}

package util;class Calc {

int e0 = 0, e1 = 0, e2 = 0;

void enter(int val) {e2 = e1; e1 = e0; e0 = val;

}void clear() {e0 = e1 = e2 = 0;

}String top() {//...

}void add() {e0 = e1 + e0; e1 = e2;

}}

● =

util

Calc

e0 e2e1 enter cleartop

util

Calc

add

util

Calc

e0 e2e1 enter cleartop add

● =

feature: CalcBase

feature: Add

feature: CalcAdd

http://wwwiti.cs.uni-magdeburg.de/iti_db/lehre/epmd/2009/slides/06_FOP.pdf

Thomas Thum, Jens Meinicke FeatureIDE: Background 3

Composition Engines

Feature Orientated Command-line tools used to compose fileswithin FeatureIDE:

I AHEAD (mixin): .jak (Java 1.4)http://userweb.cs.utexas.edu/˜schwartz/ATS.html

I FeatureC++: .cpp (C++)http://www.fosd.de/fcpp

I FeatureHouse: .java (Java 1.5), .cs (C#), .c/.h (C), .hs(Haskell), .jj (JavaCC), .als (Alloy), .xmi (UML)http://www.fosd.de/fh

Thomas Thum, Jens Meinicke FeatureIDE: Background 4

Composition Engines

Non Feature Orientated Command-line tools used to compose fileswithin FeatureIDE:

I AspectJ(Aspectorientated Java): .aj(Aspect File), .javahttp://www.eclipse.org/aspectj/

I DeltaJ(Deltaoriantated Java): .dj(Core and Delta Modules)http://sourceforge.net/projects/deltaj/

I Munge: Preprocessorhttp://sonatype.github.com/munge-maven-plugin/

I Antenna: Preprocessorhttp://antenna.sourceforge.net/

Thomas Thum, Jens Meinicke FeatureIDE: Background 5

Configuration

I Selection of featuresI Composition of features results in a program variantI Not all combinations are useful

Thomas Thum, Jens Meinicke FeatureIDE: Background 6

Feature Model

I Specifies valid combinations of featuresI Graphically represented by a feature diagramI Created for a particular domainI Describes a software product line (SPL)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

NewCompound1

Layer1 Layer2

And-groupNewCompound1

Layer1 Layer2

Or-groupNewCompound1

Layer1 Layer2

Alternative-groupNewCompound1

Layer1 Layer2Mandatory

NewCompound1

Layer1 Layer2Optional

And-group

MandatoryOptional

Alternative-groupOr-group

Cross-tree constraints

Thomas Thum, Jens Meinicke FeatureIDE: Background 7

Feature Model

I Specifies valid combinations of featuresI Graphically represented by a feature diagramI Created for a particular domainI Describes a software product line (SPL)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

NewCompound1

Layer1 Layer2

And-groupNewCompound1

Layer1 Layer2

Or-groupNewCompound1

Layer1 Layer2

Alternative-groupNewCompound1

Layer1 Layer2Mandatory

NewCompound1

Layer1 Layer2Optional

And-group

MandatoryOptional

Alternative-groupOr-group

Cross-tree constraints

Thomas Thum, Jens Meinicke FeatureIDE: Background 7

Feature Model

I Specifies valid combinations of featuresI Graphically represented by a feature diagramI Created for a particular domainI Describes a software product line (SPL)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

NewCompound1

Layer1 Layer2

And-groupNewCompound1

Layer1 Layer2

Or-groupNewCompound1

Layer1 Layer2

Alternative-groupNewCompound1

Layer1 Layer2Mandatory

NewCompound1

Layer1 Layer2Optional

And-group

Mandatory

Optional

Alternative-groupOr-group

Cross-tree constraints

Thomas Thum, Jens Meinicke FeatureIDE: Background 7

Feature Model

I Specifies valid combinations of featuresI Graphically represented by a feature diagramI Created for a particular domainI Describes a software product line (SPL)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

NewCompound1

Layer1 Layer2

And-groupNewCompound1

Layer1 Layer2

Or-groupNewCompound1

Layer1 Layer2

Alternative-groupNewCompound1

Layer1 Layer2Mandatory

NewCompound1

Layer1 Layer2Optional

And-group

Mandatory

Optional

Alternative-groupOr-group

Cross-tree constraints

Thomas Thum, Jens Meinicke FeatureIDE: Background 7

Feature Model

I Specifies valid combinations of featuresI Graphically represented by a feature diagramI Created for a particular domainI Describes a software product line (SPL)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

NewCompound1

Layer1 Layer2

And-groupNewCompound1

Layer1 Layer2

Or-groupNewCompound1

Layer1 Layer2

Alternative-groupNewCompound1

Layer1 Layer2Mandatory

NewCompound1

Layer1 Layer2Optional

And-group

MandatoryOptional

Alternative-group

Or-group

Cross-tree constraints

Thomas Thum, Jens Meinicke FeatureIDE: Background 7

Feature Model

I Specifies valid combinations of featuresI Graphically represented by a feature diagramI Created for a particular domainI Describes a software product line (SPL)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

NewCompound1

Layer1 Layer2

And-groupNewCompound1

Layer1 Layer2

Or-groupNewCompound1

Layer1 Layer2

Alternative-groupNewCompound1

Layer1 Layer2Mandatory

NewCompound1

Layer1 Layer2Optional

And-group

MandatoryOptional

Alternative-group

Or-group

Cross-tree constraints

Thomas Thum, Jens Meinicke FeatureIDE: Background 7

Feature Model

I Specifies valid combinations of featuresI Graphically represented by a feature diagramI Created for a particular domainI Describes a software product line (SPL)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

NewCompound1

Layer1 Layer2

And-groupNewCompound1

Layer1 Layer2

Or-groupNewCompound1

Layer1 Layer2

Alternative-groupNewCompound1

Layer1 Layer2Mandatory

NewCompound1

Layer1 Layer2Optional

And-group

MandatoryOptional

Alternative-groupOr-group

Cross-tree constraints

Thomas Thum, Jens Meinicke FeatureIDE: Background 7

Feature-Oriented Software Development (FOSD)

GraphLibrary

Edges

Directed Undirected

Algorithms

Number Cycle

Cycle ⇒ Directed

Feature Model Feature Modules

Configurations Composer Program Variants

Thomas Thum, Jens Meinicke FeatureIDE: Background 8