logic: deep copy edge components

- added a copy method to EdgeComponents
- added a copy method to DataTypeModifier

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src/lib/data/graph/Edge.cpp

@@ -36,7 +36,7 @@ std::shared_ptr<Edge> Edge::createPlainCopy(Node* from, Node* to) const
 
 	for (std::shared_ptr<EdgeComponent> component: m_components)
 	{
-		edge->addComponent(component); // Todo: create a deep copy here
+		edge->addComponent(component->copy());
 	}
 
 	return edge;

src/lib/data/graph/edgeComponent/EdgeComponent.h

@@ -10,6 +10,8 @@ public:
 	EdgeComponent();
 	virtual ~EdgeComponent();
 
+	virtual std::shared_ptr<EdgeComponent> copy() const = 0;
+
 	void setEdge(Edge* edge);
 
 protected:

src/lib/data/graph/edgeComponent/EdgeComponentDataType.cpp

@@ -13,6 +13,11 @@ EdgeComponentDataType::~EdgeComponentDataType()
 {
 }
 
+std::shared_ptr<EdgeComponent> EdgeComponentDataType::copy() const
+{
+	return std::make_shared<EdgeComponentDataType>(m_qualifierList, m_modifierStack);
+}
+
 DataType EdgeComponentDataType::getDataType() const
 {
 	return DataType(getEdge()->getTo()->getName(), m_qualifierList, m_modifierStack);

src/lib/data/graph/edgeComponent/EdgeComponentDataType.h

@@ -14,6 +14,8 @@ public:
 	EdgeComponentDataType(const DataTypeQualifierList qualifierList, const DataTypeModifierStack modifierStack);
 	virtual ~EdgeComponentDataType();
 
+	virtual std::shared_ptr<EdgeComponent> copy() const;
+
 	DataType getDataType() const;
 
 private: