added Descriptor::getPermittedChildren.

2 files changed, 25 insertions, 0 deletions

diff --git a/src/core/model/Domain.cpp b/src/core/model/Domain.cpp
index 6f33ebd..3cc9755 100644
--- a/src/core/model/Domain.cpp
+++ b/src/core/model/Domain.cpp
@@ -471,6 +471,19 @@ NodeVector<FieldDescriptor> Descriptor::getDefaultFields() const
 	return res;
 }
 
+NodeVector<StructuredClass> Descriptor::getPermittedChildren() const
+{
+	// TODO: In principle a cast would be nicer here, but for now we copy.
+	NodeVector<Node> nodes = collect(this, [](Handle<Node> n) {
+		return n->isa(&RttiTypes::StructuredClass);
+	});
+	NodeVector<StructuredClass> res;
+	for (auto n : nodes) {
+		res.push_back(n.cast<StructuredClass>());
+	}
+	return res;
+}
+
 static ssize_t getFieldDescriptorIndex(const NodeVector<FieldDescriptor> &fds,
                                        const std::string &name)
 {
diff --git a/src/core/model/Domain.hpp b/src/core/model/Domain.hpp
index c277812..6bc2fba 100644
--- a/src/core/model/Domain.hpp
+++ b/src/core/model/Domain.hpp
@@ -624,6 +624,18 @@ public:
 	 *         children of an instance of this Descriptor.
 	 */
 	NodeVector<FieldDescriptor> getDefaultFields() const;
+
+	/**
+	 * Returns a vector of all StructuredClasses that are allowed as children
+	 * of an instance of this Descriptor in the structure tree. This also makes
+	 * use of transparency.
+	 * The list is sorted by the number of transparent elements that have to be
+	 * constructed to arrive at the respective FieldDescriptor.
+	 *
+	 * @return a vector of all StructuredClasses that are allowed as children
+	 *         of an instance of this Descriptor in the structure tree.
+	 */
+	NodeVector<StructuredClass> getPermittedChildren() const;
 };
 /*
  * TODO: We should discuss Cardinalities one more time. Is it smart to define