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diff --git a/source/blender/io/alembic/exporter/abc_hierarchy_iterator.h b/source/blender/io/alembic/exporter/abc_hierarchy_iterator.h
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+++ b/source/blender/io/alembic/exporter/abc_hierarchy_iterator.h
@@ -0,0 +1,90 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2020 Blender Foundation.
+ * All rights reserved.
+ */
+#pragma once
+
+#include "ABC_alembic.h"
+#include "abc_archive.h"
+
+#include "IO_abstract_hierarchy_iterator.h"
+
+#include <string>
+
+#include <Alembic/Abc/OArchive.h>
+#include <Alembic/Abc/OObject.h>
+
+struct Depsgraph;
+struct ID;
+struct Object;
+
+namespace blender {
+namespace io {
+namespace alembic {
+
+class ABCHierarchyIterator;
+
+struct ABCWriterConstructorArgs {
+  Depsgraph *depsgraph;
+  ABCArchive *abc_archive;
+  Alembic::Abc::OObject abc_parent;
+  std::string abc_name;
+  std::string abc_path;
+  const ABCHierarchyIterator *hierarchy_iterator;
+  const AlembicExportParams *export_params;
+};
+
+class ABCHierarchyIterator : public AbstractHierarchyIterator {
+ private:
+  ABCArchive *abc_archive_;
+  const AlembicExportParams &params_;
+
+ public:
+  ABCHierarchyIterator(Depsgraph *depsgraph,
+                       ABCArchive *abc_archive_,
+                       const AlembicExportParams &params);
+
+  virtual void iterate_and_write() override;
+  virtual std::string make_valid_name(const std::string &name) const override;
+
+ protected:
+  virtual bool mark_as_weak_export(const Object *object) const override;
+
+  virtual ExportGraph::key_type determine_graph_index_object(
+      const HierarchyContext *context) override;
+  virtual AbstractHierarchyIterator::ExportGraph::key_type determine_graph_index_dupli(
+      const HierarchyContext *context, const std::set<Object *> &dupli_set) override;
+
+  virtual AbstractHierarchyWriter *create_transform_writer(
+      const HierarchyContext *context) override;
+  virtual AbstractHierarchyWriter *create_data_writer(const HierarchyContext *context) override;
+  virtual AbstractHierarchyWriter *create_hair_writer(const HierarchyContext *context) override;
+  virtual AbstractHierarchyWriter *create_particle_writer(
+      const HierarchyContext *context) override;
+
+  virtual void delete_object_writer(AbstractHierarchyWriter *writer) override;
+
+ private:
+  Alembic::Abc::OObject get_alembic_parent(const HierarchyContext *context) const;
+  ABCWriterConstructorArgs writer_constructor_args(const HierarchyContext *context) const;
+  void update_archive_bounding_box();
+  void update_bounding_box_recursive(Imath::Box3d &bounds, const HierarchyContext *context);
+};
+
+}  // namespace alembic
+}  // namespace io
+}  // namespace blender