[moco] Introduce GraphBuilder (#3216)

This will introduce GraphBuilder interface to build graph of operator nodes

Signed-off-by: SaeHie Park <saehie.park@samsung.com>

diff --git a/contrib/moco/lib/frontend/tf/src/GraphBuilder.h b/contrib/moco/lib/frontend/tf/src/GraphBuilder.h
new file mode 100644 (file)
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+++ b/contrib/moco/lib/frontend/tf/src/GraphBuilder.h
@@ -0,0 +1,43 @@
+/*
+ * 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 __GRAPH_BUILDER_H__
+#define __GRAPH_BUILDER_H__
+
+#include "GraphBuilderContext.h"
+
+#include <tensorflow/core/framework/graph.pb.h>
+
+namespace moco
+{
+namespace tf
+{
+
+/**
+ * @brief Parent class of TF operation graph builders (e.g., Conv2DGraphBuilder)
+ */
+class GraphBuilder
+{
+public:
+  virtual bool validate(const tensorflow::NodeDef &) const = 0;
+  virtual void build(const tensorflow::NodeDef &, GraphBuilderContext *) const = 0;
+  virtual ~GraphBuilder() {}
+};
+
+} // namespace tf
+} // namespace moco
+
+#endif // __GRAPH_BUILDER_H__