1 files changed, 87 insertions, 0 deletions
diff --git a/compiler/moco/import/include/moco/Import/GraphBuilderRegistry.h b/compiler/moco/import/include/moco/Import/GraphBuilderRegistry.h
new file mode 100644
index 000000000..da65cffb8
--- /dev/null
+++ b/compiler/moco/import/include/moco/Import/GraphBuilderRegistry.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __MOCO_IMPORT_GRAPH_BUILDER_REGISTRY_H__
+#define __MOCO_IMPORT_GRAPH_BUILDER_REGISTRY_H__
+
+#include "moco/Import/GraphBuilder.h"
+
+#include <map>
+#include <memory>
+#include <string>
+
+namespace moco
+{
+
+struct GraphBuilderSource
+{
+  virtual ~GraphBuilderSource() = default;
+
+  /**
+   * @brief Returns registered GraphBuilder pointer for operator (nullptr if not present)
+   */
+  virtual const GraphBuilder *lookup(const std::string &op) const = 0;
+};
+
+/**
+ * @brief Class to return graph builder for TF nodes
+ */
+class GraphBuilderRegistry final : public GraphBuilderSource
+{
+public:
+  GraphBuilderRegistry();
+
+public:
+  GraphBuilderRegistry(const GraphBuilderSource *parent) : _parent{parent}
+  {
+    // DO NOTHING
+  }
+
+public:
+  /**
+   * @brief Returns registered GraphBuilder pointer for operator or
+   *        nullptr if not registered
+   */
+  const GraphBuilder *lookup(const std::string &op) const final
+  {
+    if (_builder_map.find(op) == _builder_map.end())
+      return (_parent == nullptr) ? nullptr : _parent->lookup(op);
+
+    return _builder_map.at(op).get();
+  }
+
+  static GraphBuilderRegistry &get()
+  {
+    static GraphBuilderRegistry me;
+    return me;
+  }
+
+public:
+  void add(const std::string op, std::unique_ptr<GraphBuilder> &&builder)
+  {
+    _builder_map[op] = std::move(builder);
+  }
+
+private:
+  const GraphBuilderSource *_parent = nullptr;
+
+private:
+  std::map<const std::string, std::unique_ptr<GraphBuilder>> _builder_map;
+};
+
+} // namespace mono
+
+#endif // __MOCO_IMPORT_GRAPH_BUILDER_REGISTRY_H__