added DocumentEntity::getField with direct indexation.

2 files changed, 25 insertions, 2 deletions

diff --git a/src/core/model/Document.cpp b/src/core/model/Document.cpp
index b38f2c0..a2ba5cf 100644
--- a/src/core/model/Document.cpp
+++ b/src/core/model/Document.cpp
@@ -306,6 +306,18 @@ const NodeVector<StructureNode> &DocumentEntity::getField(
 	return fields[enforceGetFieldDescriptorIndex(descriptor, fieldDescriptor)];
 }
 
+const NodeVector<StructureNode> &DocumentEntity::getField(
+    const size_t &idx) const
+{
+	if (idx >= fields.size()) {
+		throw OusiaException(std::string("Descriptor \"") +
+		                     descriptor->getName() +
+		                     "\" does not have enough fields for index \"" +
+		                     std::to_string(idx) + "\".");
+	}
+	return fields[idx];
+}
+
 void DocumentEntity::addStructureNode(Handle<StructureNode> s, const int &i)
 {
 	// only add the new node if we don't have it already.
@@ -813,5 +825,4 @@ const Rtti AnnotationEntity =
         .parent(&Node)
         .composedOf({&StructuredEntity, &DocumentPrimitive, &Anchor});
 }
-}
-
+}
\ No newline at end of file
diff --git a/src/core/model/Document.hpp b/src/core/model/Document.hpp
index bffd397..5f06eb0 100644
--- a/src/core/model/Document.hpp
+++ b/src/core/model/Document.hpp
@@ -237,6 +237,18 @@ public:
 	    Handle<FieldDescriptor> fieldDescriptor) const;
 
 	/**
+	 * This returns the vector of entities containing all members of the field
+	 * with the given index.
+	 *
+	 * If the index is out of bounds an exception is thrown.
+	 *
+	 * @param idx       is the index of a field as specified in the
+	 *                  FieldDescriptor in the Domain description.
+	 * @return          a NodeVector of all StructuredEntities in that field.
+	 */
+	const NodeVector<StructureNode> &getField(const size_t& idx ) const;
+
+	/**
 	 * This adds a StructureNode to the field with the given index.
 	 *
 	 * This method also changes the parent of the newly added StructureNode if