Issue 9

src/main/java/de/vill/model/building/AbstractUVLElementFactory.java

@@ -0,0 +1,15 @@
+package de.vill.model.building;
+
+import de.vill.exception.ParseError;
+import de.vill.model.*;
+import de.vill.model.constraint.LiteralConstraint;
+
+public abstract class AbstractUVLElementFactory {
+
+    public abstract Feature createFeature(String name);
+
+    public abstract <T> Attribute<T> createAttribute(String name, T value, Feature correspondingFeature);
+
+    public abstract GlobalAttribute createGlobalAttribute(String identifier, FeatureModel featureModel);
+
+}

src/main/java/de/vill/model/building/DefaultUVLElementFactory.java

@@ -0,0 +1,23 @@
+package de.vill.model.building;
+
+import de.vill.exception.ParseError;
+import de.vill.model.*;
+import de.vill.model.constraint.LiteralConstraint;
+
+public class DefaultUVLElementFactory extends AbstractUVLElementFactory {
+
+    @Override
+    public Feature createFeature(String name) {
+        return new Feature(name);
+    }
+
+    @Override
+    public <T> Attribute<T> createAttribute(String name, T value, Feature correspondingFeature) {
+        return new Attribute<>(name, value, correspondingFeature);
+    }
+
+    @Override
+    public GlobalAttribute createGlobalAttribute(String identifier, FeatureModel featureModel) {
+        return new GlobalAttribute(identifier, featureModel);
+    }
+}

src/main/java/de/vill/model/building/FeatureModelBuilder.java

@@ -11,23 +11,27 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.function.Function;
 
-/**
- *
- */
 public class FeatureModelBuilder {
 
     private FeatureModel fmInConstruction;
 
+    private AbstractUVLElementFactory elementFactory;
+
     public FeatureModelBuilder() {
-        fmInConstruction = new FeatureModel();
+        this(new DefaultUVLElementFactory());
+    }
+
+    public FeatureModelBuilder(AbstractUVLElementFactory factory) {
+        this.elementFactory = factory;
+        this.fmInConstruction = new FeatureModel();
     }
 
     public FeatureModelBuilder(FeatureModel old) {
         fmInConstruction = old;
     }
 
-
     public void addImport(Import importToAdd) {
         fmInConstruction.getImports().add(importToAdd);
     }
@@ -49,7 +53,7 @@ public boolean setRootFeature(Feature feature) {
     }
 
     public Feature addRootFeature(String featureName, FeatureType featureType, Cardinality cardinality) {
-        Feature rootFeature = new Feature(featureName);
+        Feature rootFeature = elementFactory.createFeature(featureName);
         rootFeature.setFeatureType(featureType);
         rootFeature.setCardinality(cardinality);
 
@@ -65,13 +69,14 @@ public Feature addFeature(String featureName, Group group) {
     public Feature addFeature(String featureName, Group group, Import featureOrigin) {
         return addFeature(featureName, group, featureOrigin, FeatureType.BOOL);
     }
-    
-    public Feature addFeature(String featureName, Group group, Import featureOrigin,  FeatureType type) {
+
+    public Feature addFeature(String featureName, Group group, Import featureOrigin, FeatureType type) {
         return addFeature(featureName, group, featureOrigin, type, Cardinality.getStandardFeatureCardinality());
     }
 
-    public Feature addFeature(String featureName, Group group, Import featureOrigin, FeatureType type, Cardinality cardinality) {
-        Feature feature = new Feature(featureName);
+    public Feature addFeature(String featureName, Group group, Import featureOrigin, FeatureType type,
+            Cardinality cardinality) {
+        Feature feature = elementFactory.createFeature(featureName);
         feature.setRelatedImport(featureOrigin);
         feature.setFeatureType(type);
         feature.setCardinality(cardinality);
@@ -99,9 +104,11 @@ public void addAttribute(Feature feature, Attribute<?> attribute) {
 
     /**
      * Renames a feature and propagates the change through the mdoel
+     * 
      * @param oldName current name of feature to be renamed in the model
      * @param newName target name
-     * @return indicator whether oldName successfully changed in the feature model; fails if oldName is not present
+     * @return indicator whether oldName successfully changed in the feature model;
+     *         fails if oldName is not present
      */
     public boolean renameFeature(String oldName, String newName) {
         Map<String, Feature> featureMap = fmInConstruction.getFeatureMap();
@@ -137,6 +144,7 @@ public void renameAttributeGlobally(String oldName, String newName) {
             crawlConstraintsToRenameGlobalAttribute(constraint, oldName, newName);
         }
     }
+
     private void crawlConstraintsToRenameGlobalAttribute(Constraint constraint, String attributeName, String replace) {
         if (constraint instanceof ExpressionConstraint) {
             for (Expression exp : ((ExpressionConstraint) constraint).getExpressionSubParts()) {
@@ -154,7 +162,8 @@ private void crawlExpressionsToRenameGlobalAttribute(Expression expression, Stri
             AggregateFunctionExpression aggregateFunctionExpression = (AggregateFunctionExpression) expression;
             if (aggregateFunctionExpression.getAttribute().getIdentifier().equals(attributeName)) {
                 aggregateFunctionExpression.getAttribute().renameGlobalAttribute(replace);
-            };
+            }
+            ;
         } else {
             for (Expression exp : expression.getExpressionSubParts()) {
                 crawlExpressionsToRenameGlobalAttribute(exp, attributeName, replace);
@@ -163,15 +172,16 @@ private void crawlExpressionsToRenameGlobalAttribute(Expression expression, Stri
     }
 
     public void addConstraint(Constraint constraint) {
-        fmInConstruction.getOwnConstraints().add(0,constraint);
+        fmInConstruction.getOwnConstraints().add(0, constraint);
     }
 
     public void addConstraintAtPosition(Constraint constraint, int position) {
-        fmInConstruction.getOwnConstraints().add(position,constraint);
+        fmInConstruction.getOwnConstraints().add(position, constraint);
     }
 
     public boolean doesFeatureModelSatisfyLanguageLevels(Set<LanguageLevel> languageLevelsToSatisfy) {
-        return fmInConstruction.isExplicitLanguageLevels() && !fmInConstruction.getUsedLanguageLevels().equals(languageLevelsToSatisfy);
+        return fmInConstruction.isExplicitLanguageLevels()
+                && !fmInConstruction.getUsedLanguageLevels().equals(languageLevelsToSatisfy);
     }
 
     public FeatureModel getFeatureModel() {
@@ -192,7 +202,7 @@ public LiteralConstraint createFeatureLiteral(String name) {
     }
 
     public GlobalAttribute createGlobalAttribute(String name) {
-        GlobalAttribute toCreate = new GlobalAttribute(name, fmInConstruction);
+        GlobalAttribute toCreate = elementFactory.createGlobalAttribute(name, fmInConstruction);
         if (toCreate.getType() == null) {
             System.err.println("Tried to reference " + name + " but attribute with that name does not exist");
             return null;