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+/* Copyright 2018 The TensorFlow Authors. 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 TENSORFLOW_CONTRIB_LITE_DELEGATES_FLEX_DELEGATE_DATA_H_
+#define TENSORFLOW_CONTRIB_LITE_DELEGATES_FLEX_DELEGATE_DATA_H_
+
+#include "tensorflow/contrib/lite/delegates/flex/buffer_map.h"
+#include "tensorflow/core/common_runtime/eager/context.h"
+
+namespace tflite {
+namespace flex {
+
+// Data kept by the Flex delegate for the lifetime of an Interpreter.
+class DelegateData {
+ public:
+  // Create a new DelegateData, initialized with a newly-created EagerContext.
+  static tensorflow::Status Create(std::unique_ptr<DelegateData>* data);
+
+  ~DelegateData();
+
+  // The EagerContext that is required for execution of Flex Ops.
+  tensorflow::EagerContext* GetEagerContext() { return eager_context_.get(); }
+
+  // Map from TF Lite tensor index to TensorFlow tensor for a given context.
+  BufferMap* GetBufferMap(const TfLiteContext* context) {
+    return &buffer_map_[context];
+  }
+
+ private:
+  explicit DelegateData(tensorflow::EagerContext* eager_context);
+
+  std::unique_ptr<tensorflow::EagerContext> eager_context_;
+  // TODO(b/112439500): Clean up stale BufferMap instances after adding the
+  // necessary cleanup hook from a TfLiteContext to a TfLiteDelegate.
+  std::unordered_map<const TfLiteContext*, BufferMap> buffer_map_;
+};
+
+}  // namespace flex
+}  // namespace tflite
+
+#endif  // TENSORFLOW_CONTRIB_LITE_DELEGATES_FLEX_DELEGATE_DATA_H_