Added getFieldDescriptor method with numeric index

1 files changed, 18 insertions, 0 deletions

diff --git a/src/core/model/Ontology.hpp b/src/core/model/Ontology.hpp
index 079640c..8d6e596 100644
--- a/src/core/model/Ontology.hpp
+++ b/src/core/model/Ontology.hpp
@@ -669,6 +669,7 @@ public:
 	 *           FieldDescriptor is not registered at this Descriptor.
 	 */
 	ssize_t getFieldDescriptorIndex(Handle<FieldDescriptor> fd) const;
+
 	/**
 	 * Returns the FieldDescriptor with the given name.
 	 *
@@ -680,6 +681,23 @@ public:
 	Rooted<FieldDescriptor> getFieldDescriptor(
 	    const std::string &name = DEFAULT_FIELD_NAME) const;
 
+
+	/**
+	 * Returns the FieldDescriptor with the given index.
+	 *
+	 * @param index the index of the field that should be retrieved.
+
+	 * @return      the FieldDescriptor with the given index or a nullptr if no
+	 *              such FieldDescriptor was found.
+	 */
+	Rooted<FieldDescriptor> getFieldDescriptor(size_t index) const
+	{
+		if (index < fieldDescriptors.size()) {
+			return fieldDescriptors[index];
+		}
+		return nullptr;
+	}
+
 	/**
 	 * This returns true if this Descriptor has a FieldDescriptor with the
 	 * given name.