Add ExtractExampleParserConfiguration method

- Extract the fixed length and variable length feature configurations
  output tensor names from a given GraphDef.
- This will allow for the use case of bypassing an unnecessary tensorflow.Example
  serialize/deserialize at serving/inference time by extracting the configuration,
  running  the proto -> tensor helpers directly and feeding the graph with
  the properly named tensors
Change: 122636456

1 files changed, 47 insertions, 0 deletions

diff --git a/tensorflow/core/example/example_parser_configuration.h b/tensorflow/core/example/example_parser_configuration.h
new file mode 100644
index 0000000000..cf90dd7f4b
--- /dev/null
+++ b/tensorflow/core/example/example_parser_configuration.h
@@ -0,0 +1,47 @@
+/* Copyright 2016 Google Inc. 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 THIRD_PARTY_TENSORFLOW_CORE_EXAMPLE_EXAMPLE_PARSER_CONFIGURATION_H_
+#define THIRD_PARTY_TENSORFLOW_CORE_EXAMPLE_EXAMPLE_PARSER_CONFIGURATION_H_
+
+#include <string>
+#include <vector>
+
+#include "tensorflow/core/example/example.pb.h"
+#include "tensorflow/core/framework/allocator.h"
+#include "tensorflow/core/framework/graph.pb.h"
+#include "tensorflow/core/framework/tensor.h"
+#include "tensorflow/core/framework/types.h"
+#include "tensorflow/core/platform/types.h"
+#include "tensorflow/core/public/session.h"
+#include "tensorflow/core/util/example_proto_helper.h"
+#include "tensorflow/core/util/sparse/sparse_tensor.h"
+
+// This is a set of helper methods that will make it possible to share
+// tensorflow::Example proto Tensor conversion code inside the ExampleParserOp
+// OpKernel as well as in external code.
+namespace tensorflow {
+
+// Given a graph and the node_name of a ParseExample op,
+// extract the FixedLenFeature/VarLenFeature configurations.
+Status ExtractExampleParserConfiguration(
+    const tensorflow::GraphDef& graph, const string& node_name,
+    tensorflow::Session* session,
+    std::vector<FixedLenFeature>* fixed_len_features,
+    std::vector<VarLenFeature>* var_len_features);
+
+}  // namespace tensorflow
+
+#endif  // THIRD_PARTY_TENSORFLOW_CORE_EXAMPLE_EXAMPLE_PARSE_CONFIGURATION_H_