From 6f2b4fa665ae013aa6e7e0282b31cf2bd720858e Mon Sep 17 00:00:00 2001
From: YangLuo <luoyang42@huawei.com>
Date: Tue, 30 Mar 2021 16:27:58 +0800
Subject: [PATCH] fix codex warning

---
 .../ccsrc/minddata/dataset/api/datasets.cc    | 40 +++++------
 .../ccsrc/minddata/dataset/api/samplers.cc    | 14 ++--
 mindspore/ccsrc/minddata/dataset/api/text.cc  |  1 -
 .../ccsrc/minddata/dataset/api/vision.cc      |  7 +-
 .../ccsrc/minddata/dataset/include/datasets.h | 66 ++++++++++---------
 .../ccsrc/minddata/dataset/include/samplers.h | 16 ++---
 .../ccsrc/minddata/dataset/include/vision.h   |  7 +-
 .../dataset/liteapi/include/datasets.h        | 10 +--
 .../dataset/liteapi/include/samplers.h        | 16 ++---
 tests/ut/cpp/dataset/c_api_samplers_test.cc   | 27 ++++++++
 10 files changed, 120 insertions(+), 84 deletions(-)

diff --git a/mindspore/ccsrc/minddata/dataset/api/datasets.cc b/mindspore/ccsrc/minddata/dataset/api/datasets.cc
index f371c9262c9..85684c6e13b 100644
--- a/mindspore/ccsrc/minddata/dataset/api/datasets.cc
+++ b/mindspore/ccsrc/minddata/dataset/api/datasets.cc
@@ -800,7 +800,7 @@ AlbumDataset::AlbumDataset(const std::vector<char> &dataset_dir, const std::vect
 }
 
 AlbumDataset::AlbumDataset(const std::vector<char> &dataset_dir, const std::vector<char> &data_schema,
-                           const std::vector<std::vector<char>> &column_names, bool decode, Sampler *sampler,
+                           const std::vector<std::vector<char>> &column_names, bool decode, const Sampler *sampler,
                            const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<AlbumNode>(CharToString(dataset_dir), CharToString(data_schema),
@@ -826,8 +826,8 @@ CelebADataset::CelebADataset(const std::vector<char> &dataset_dir, const std::ve
                                          SetCharToString(extensions), cache);
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
-CelebADataset::CelebADataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
-                             bool decode, const std::set<std::vector<char>> &extensions,
+CelebADataset::CelebADataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
+                             const Sampler *sampler, bool decode, const std::set<std::vector<char>> &extensions,
                              const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<CelebANode>(CharToString(dataset_dir), CharToString(usage), sampler_obj, decode,
@@ -850,8 +850,8 @@ Cifar10Dataset::Cifar10Dataset(const std::vector<char> &dataset_dir, const std::
   auto ds = std::make_shared<Cifar10Node>(CharToString(dataset_dir), CharToString(usage), sampler_obj, cache);
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
-Cifar10Dataset::Cifar10Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
-                               const std::shared_ptr<DatasetCache> &cache) {
+Cifar10Dataset::Cifar10Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
+                               const Sampler *sampler, const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<Cifar10Node>(CharToString(dataset_dir), CharToString(usage), sampler_obj, cache);
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
@@ -870,8 +870,8 @@ Cifar100Dataset::Cifar100Dataset(const std::vector<char> &dataset_dir, const std
   auto ds = std::make_shared<Cifar100Node>(CharToString(dataset_dir), CharToString(usage), sampler_obj, cache);
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
-Cifar100Dataset::Cifar100Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
-                                 const std::shared_ptr<DatasetCache> &cache) {
+Cifar100Dataset::Cifar100Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
+                                 const Sampler *sampler, const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<Cifar100Node>(CharToString(dataset_dir), CharToString(usage), sampler_obj, cache);
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
@@ -901,7 +901,7 @@ CocoDataset::CocoDataset(const std::vector<char> &dataset_dir, const std::vector
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
 CocoDataset::CocoDataset(const std::vector<char> &dataset_dir, const std::vector<char> &annotation_file,
-                         const std::vector<char> &task, const bool &decode, Sampler *sampler,
+                         const std::vector<char> &task, const bool &decode, const Sampler *sampler,
                          const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<CocoNode>(CharToString(dataset_dir), CharToString(annotation_file), CharToString(task),
@@ -942,7 +942,7 @@ ImageFolderDataset::ImageFolderDataset(const std::vector<char> &dataset_dir, boo
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
 
-ImageFolderDataset::ImageFolderDataset(const std::vector<char> &dataset_dir, bool decode, Sampler *sampler,
+ImageFolderDataset::ImageFolderDataset(const std::vector<char> &dataset_dir, bool decode, const Sampler *sampler,
                                        const std::set<std::vector<char>> &extensions,
                                        const std::map<std::vector<char>, int32_t> &class_indexing,
                                        const std::shared_ptr<DatasetCache> &cache) {
@@ -981,7 +981,7 @@ ManifestDataset::ManifestDataset(const std::vector<char> &dataset_file, const st
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
 ManifestDataset::ManifestDataset(const std::vector<char> &dataset_file, const std::vector<char> &usage,
-                                 Sampler *sampler, const std::map<std::vector<char>, int32_t> &class_indexing,
+                                 const Sampler *sampler, const std::map<std::vector<char>, int32_t> &class_indexing,
                                  bool decode, const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<ManifestNode>(CharToString(dataset_file), CharToString(usage), sampler_obj,
@@ -1000,7 +1000,7 @@ ManifestDataset::ManifestDataset(const std::vector<char> &dataset_file, const st
 
 MindDataDataset::MindDataDataset(const std::vector<char> &dataset_file,
                                  const std::vector<std::vector<char>> &columns_list,
-                                 const std::shared_ptr<Sampler> &sampler, nlohmann::json *padded_sample,
+                                 const std::shared_ptr<Sampler> &sampler, const nlohmann::json *padded_sample,
                                  int64_t num_padded) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   nlohmann::json sample = nullptr;
@@ -1012,8 +1012,8 @@ MindDataDataset::MindDataDataset(const std::vector<char> &dataset_file,
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
 MindDataDataset::MindDataDataset(const std::vector<char> &dataset_file,
-                                 const std::vector<std::vector<char>> &columns_list, Sampler *sampler,
-                                 nlohmann::json *padded_sample, int64_t num_padded) {
+                                 const std::vector<std::vector<char>> &columns_list, const Sampler *sampler,
+                                 const nlohmann::json *padded_sample, int64_t num_padded) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   nlohmann::json sample = nullptr;
   if (padded_sample) {
@@ -1025,7 +1025,7 @@ MindDataDataset::MindDataDataset(const std::vector<char> &dataset_file,
 }
 MindDataDataset::MindDataDataset(const std::vector<char> &dataset_file,
                                  const std::vector<std::vector<char>> &columns_list,
-                                 const std::reference_wrapper<Sampler> sampler, nlohmann::json *padded_sample,
+                                 const std::reference_wrapper<Sampler> sampler, const nlohmann::json *padded_sample,
                                  int64_t num_padded) {
   auto sampler_obj = sampler.get().Parse();
   nlohmann::json sample = nullptr;
@@ -1039,7 +1039,7 @@ MindDataDataset::MindDataDataset(const std::vector<char> &dataset_file,
 }
 MindDataDataset::MindDataDataset(const std::vector<std::vector<char>> &dataset_files,
                                  const std::vector<std::vector<char>> &columns_list,
-                                 const std::shared_ptr<Sampler> &sampler, nlohmann::json *padded_sample,
+                                 const std::shared_ptr<Sampler> &sampler, const nlohmann::json *padded_sample,
                                  int64_t num_padded) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   nlohmann::json sample = nullptr;
@@ -1052,8 +1052,8 @@ MindDataDataset::MindDataDataset(const std::vector<std::vector<char>> &dataset_f
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
 MindDataDataset::MindDataDataset(const std::vector<std::vector<char>> &dataset_files,
-                                 const std::vector<std::vector<char>> &columns_list, Sampler *sampler,
-                                 nlohmann::json *padded_sample, int64_t num_padded) {
+                                 const std::vector<std::vector<char>> &columns_list, const Sampler *sampler,
+                                 const nlohmann::json *padded_sample, int64_t num_padded) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   nlohmann::json sample = nullptr;
   if (padded_sample) {
@@ -1066,7 +1066,7 @@ MindDataDataset::MindDataDataset(const std::vector<std::vector<char>> &dataset_f
 }
 MindDataDataset::MindDataDataset(const std::vector<std::vector<char>> &dataset_files,
                                  const std::vector<std::vector<char>> &columns_list,
-                                 const std::reference_wrapper<Sampler> sampler, nlohmann::json *padded_sample,
+                                 const std::reference_wrapper<Sampler> sampler, const nlohmann::json *padded_sample,
                                  int64_t num_padded) {
   auto sampler_obj = sampler.get().Parse();
   nlohmann::json sample = nullptr;
@@ -1085,7 +1085,7 @@ MnistDataset::MnistDataset(const std::vector<char> &dataset_dir, const std::vect
   auto ds = std::make_shared<MnistNode>(CharToString(dataset_dir), CharToString(usage), sampler_obj, cache);
   ir_node_ = std::static_pointer_cast<DatasetNode>(ds);
 }
-MnistDataset::MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
+MnistDataset::MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, const Sampler *sampler,
                            const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<MnistNode>(CharToString(dataset_dir), CharToString(usage), sampler_obj, cache);
@@ -1118,7 +1118,7 @@ VOCDataset::VOCDataset(const std::vector<char> &dataset_dir, const std::vector<c
 }
 VOCDataset::VOCDataset(const std::vector<char> &dataset_dir, const std::vector<char> &task,
                        const std::vector<char> &usage, const std::map<std::vector<char>, int32_t> &class_indexing,
-                       bool decode, Sampler *sampler, const std::shared_ptr<DatasetCache> &cache) {
+                       bool decode, const Sampler *sampler, const std::shared_ptr<DatasetCache> &cache) {
   auto sampler_obj = sampler ? sampler->Parse() : nullptr;
   auto ds = std::make_shared<VOCNode>(CharToString(dataset_dir), CharToString(task), CharToString(usage),
                                       MapCharToString(class_indexing), decode, sampler_obj, cache);
diff --git a/mindspore/ccsrc/minddata/dataset/api/samplers.cc b/mindspore/ccsrc/minddata/dataset/api/samplers.cc
index 50046d135e3..66959690288 100644
--- a/mindspore/ccsrc/minddata/dataset/api/samplers.cc
+++ b/mindspore/ccsrc/minddata/dataset/api/samplers.cc
@@ -31,7 +31,7 @@ DistributedSampler::DistributedSampler(int64_t num_shards, int64_t shard_id, boo
       offset_(offset),
       even_dist_(even_dist) {}
 
-std::shared_ptr<SamplerObj> DistributedSampler::Parse() {
+std::shared_ptr<SamplerObj> DistributedSampler::Parse() const {
   return std::make_shared<DistributedSamplerObj>(num_shards_, shard_id_, shuffle_, num_samples_, seed_, offset_,
                                                  even_dist_);
 }
@@ -40,7 +40,7 @@ std::shared_ptr<SamplerObj> DistributedSampler::Parse() {
 PKSampler::PKSampler(int64_t num_val, bool shuffle, int64_t num_samples)
     : num_val_(num_val), shuffle_(shuffle), num_samples_(num_samples) {}
 
-std::shared_ptr<SamplerObj> PKSampler::Parse() {
+std::shared_ptr<SamplerObj> PKSampler::Parse() const {
   return std::make_shared<PKSamplerObj>(num_val_, shuffle_, num_samples_);
 }
 
@@ -48,7 +48,7 @@ std::shared_ptr<SamplerObj> PKSampler::Parse() {
 RandomSampler::RandomSampler(bool replacement, int64_t num_samples)
     : replacement_(replacement), num_samples_(num_samples) {}
 
-std::shared_ptr<SamplerObj> RandomSampler::Parse() {
+std::shared_ptr<SamplerObj> RandomSampler::Parse() const {
   return std::make_shared<RandomSamplerObj>(replacement_, num_samples_);
 }
 
@@ -56,7 +56,7 @@ std::shared_ptr<SamplerObj> RandomSampler::Parse() {
 SequentialSampler::SequentialSampler(int64_t start_index, int64_t num_samples)
     : start_index_(start_index), num_samples_(num_samples) {}
 
-std::shared_ptr<SamplerObj> SequentialSampler::Parse() {
+std::shared_ptr<SamplerObj> SequentialSampler::Parse() const {
   return std::make_shared<SequentialSamplerObj>(start_index_, num_samples_);
 }
 
@@ -64,7 +64,7 @@ std::shared_ptr<SamplerObj> SequentialSampler::Parse() {
 SubsetSampler::SubsetSampler(std::vector<int64_t> indices, int64_t num_samples)
     : indices_(indices), num_samples_(num_samples) {}
 
-std::shared_ptr<SamplerObj> SubsetSampler::Parse() {
+std::shared_ptr<SamplerObj> SubsetSampler::Parse() const {
   return std::make_shared<SubsetSamplerObj>(indices_, num_samples_);
 }
 
@@ -72,7 +72,7 @@ std::shared_ptr<SamplerObj> SubsetSampler::Parse() {
 SubsetRandomSampler::SubsetRandomSampler(std::vector<int64_t> indices, int64_t num_samples)
     : SubsetSampler(indices, num_samples) {}
 
-std::shared_ptr<SamplerObj> SubsetRandomSampler::Parse() {
+std::shared_ptr<SamplerObj> SubsetRandomSampler::Parse() const {
   return std::make_shared<SubsetRandomSamplerObj>(indices_, num_samples_);
 }
 
@@ -80,7 +80,7 @@ std::shared_ptr<SamplerObj> SubsetRandomSampler::Parse() {
 WeightedRandomSampler::WeightedRandomSampler(std::vector<double> weights, int64_t num_samples, bool replacement)
     : weights_(weights), num_samples_(num_samples), replacement_(replacement) {}
 
-std::shared_ptr<SamplerObj> WeightedRandomSampler::Parse() {
+std::shared_ptr<SamplerObj> WeightedRandomSampler::Parse() const {
   return std::make_shared<WeightedRandomSamplerObj>(weights_, num_samples_, replacement_);
 }
 
diff --git a/mindspore/ccsrc/minddata/dataset/api/text.cc b/mindspore/ccsrc/minddata/dataset/api/text.cc
index 1918b79513f..eae4811ff54 100644
--- a/mindspore/ccsrc/minddata/dataset/api/text.cc
+++ b/mindspore/ccsrc/minddata/dataset/api/text.cc
@@ -244,7 +244,6 @@ struct SentencePieceTokenizer::Data {
       : vocab_path_(CharToString(vocab_path)), out_type_(out_type) {}
   std::shared_ptr<SentencePieceVocab> vocab_;
   std::string vocab_path_;
-  SPieceTokenizerLoadType load_type_;
   SPieceTokenizerOutType out_type_;
 };
 
diff --git a/mindspore/ccsrc/minddata/dataset/api/vision.cc b/mindspore/ccsrc/minddata/dataset/api/vision.cc
index 6ce82a0365c..abcce030087 100644
--- a/mindspore/ccsrc/minddata/dataset/api/vision.cc
+++ b/mindspore/ccsrc/minddata/dataset/api/vision.cc
@@ -596,7 +596,8 @@ struct RandomSelectSubpolicy::Data {
   std::vector<std::vector<std::pair<std::shared_ptr<TensorOperation>, double>>> policy_;
 };
 
-RandomSelectSubpolicy::RandomSelectSubpolicy(std::vector<std::vector<std::pair<TensorTransform *, double>>> policy)
+RandomSelectSubpolicy::RandomSelectSubpolicy(
+  const std::vector<std::vector<std::pair<TensorTransform *, double>>> &policy)
     : data_(std::make_shared<Data>()) {
   for (int32_t i = 0; i < policy.size(); i++) {
     std::vector<std::pair<std::shared_ptr<TensorOperation>, double>> subpolicy;
@@ -612,7 +613,7 @@ RandomSelectSubpolicy::RandomSelectSubpolicy(std::vector<std::vector<std::pair<T
 }
 
 RandomSelectSubpolicy::RandomSelectSubpolicy(
-  std::vector<std::vector<std::pair<std::shared_ptr<TensorTransform>, double>>> policy)
+  const std::vector<std::vector<std::pair<std::shared_ptr<TensorTransform>, double>>> &policy)
     : data_(std::make_shared<Data>()) {
   for (int32_t i = 0; i < policy.size(); i++) {
     std::vector<std::pair<std::shared_ptr<TensorOperation>, double>> subpolicy;
@@ -628,7 +629,7 @@ RandomSelectSubpolicy::RandomSelectSubpolicy(
 }
 
 RandomSelectSubpolicy::RandomSelectSubpolicy(
-  std::vector<std::vector<std::pair<std::reference_wrapper<TensorTransform>, double>>> policy)
+  const std::vector<std::vector<std::pair<std::reference_wrapper<TensorTransform>, double>>> &policy)
     : data_(std::make_shared<Data>()) {
   for (int32_t i = 0; i < policy.size(); i++) {
     std::vector<std::pair<std::shared_ptr<TensorOperation>, double>> subpolicy;
diff --git a/mindspore/ccsrc/minddata/dataset/include/datasets.h b/mindspore/ccsrc/minddata/dataset/include/datasets.h
index a4d108fea78..9c6ae2455e3 100644
--- a/mindspore/ccsrc/minddata/dataset/include/datasets.h
+++ b/mindspore/ccsrc/minddata/dataset/include/datasets.h
@@ -690,7 +690,7 @@ class AlbumDataset : public Dataset {
                const std::vector<std::vector<char>> &column_names, bool decode, const std::shared_ptr<Sampler> &sampler,
                const std::shared_ptr<DatasetCache> &cache);
   AlbumDataset(const std::vector<char> &dataset_dir, const std::vector<char> &data_schema,
-               const std::vector<std::vector<char>> &column_names, bool decode, Sampler *sampler,
+               const std::vector<std::vector<char>> &column_names, bool decode, const Sampler *sampler,
                const std::shared_ptr<DatasetCache> &cache);
   AlbumDataset(const std::vector<char> &dataset_dir, const std::vector<char> &data_schema,
                const std::vector<std::vector<char>> &column_names, bool decode,
@@ -727,7 +727,8 @@ inline std::shared_ptr<AlbumDataset> Album(const std::string &dataset_dir, const
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current Dataset
 inline std::shared_ptr<AlbumDataset> Album(const std::string &dataset_dir, const std::string &data_schema,
-                                           const std::vector<std::string> &column_names, bool decode, Sampler *sampler,
+                                           const std::vector<std::string> &column_names, bool decode,
+                                           const Sampler *sampler,
                                            const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<AlbumDataset>(StringToChar(dataset_dir), StringToChar(data_schema),
                                         VectorStringToChar(column_names), decode, sampler, cache);
@@ -754,7 +755,7 @@ class CelebADataset : public Dataset {
   explicit CelebADataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                          const std::shared_ptr<Sampler> &sampler, bool decode,
                          const std::set<std::vector<char>> &extensions, const std::shared_ptr<DatasetCache> &cache);
-  explicit CelebADataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
+  explicit CelebADataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, const Sampler *sampler,
                          bool decode, const std::set<std::vector<char>> &extensions,
                          const std::shared_ptr<DatasetCache> &cache);
   explicit CelebADataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
@@ -793,8 +794,9 @@ inline std::shared_ptr<CelebADataset> CelebA(
 /// \param[in] extensions Set of file extensions to be included in the dataset (default={}).
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current Dataset
-inline std::shared_ptr<CelebADataset> CelebA(const std::string &dataset_dir, const std::string &usage, Sampler *sampler,
-                                             bool decode = false, const std::set<std::string> &extensions = {},
+inline std::shared_ptr<CelebADataset> CelebA(const std::string &dataset_dir, const std::string &usage,
+                                             const Sampler *sampler, bool decode = false,
+                                             const std::set<std::string> &extensions = {},
                                              const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<CelebADataset>(StringToChar(dataset_dir), StringToChar(usage), sampler, decode,
                                          SetStringToChar(extensions), cache);
@@ -822,7 +824,7 @@ class Cifar10Dataset : public Dataset {
  public:
   explicit Cifar10Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                           const std::shared_ptr<Sampler> &sampler, const std::shared_ptr<DatasetCache> &cache);
-  explicit Cifar10Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
+  explicit Cifar10Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, const Sampler *sampler,
                           const std::shared_ptr<DatasetCache> &cache);
   explicit Cifar10Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                           const std::reference_wrapper<Sampler> sampler, const std::shared_ptr<DatasetCache> &cache);
@@ -853,7 +855,8 @@ inline std::shared_ptr<Cifar10Dataset> Cifar10(
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current Dataset
 inline std::shared_ptr<Cifar10Dataset> Cifar10(const std::string &dataset_dir, const std::string &usage,
-                                               Sampler *sampler, const std::shared_ptr<DatasetCache> &cache = nullptr) {
+                                               const Sampler *sampler,
+                                               const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<Cifar10Dataset>(StringToChar(dataset_dir), StringToChar(usage), sampler, cache);
 }
 
@@ -874,7 +877,7 @@ class Cifar100Dataset : public Dataset {
  public:
   explicit Cifar100Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                            const std::shared_ptr<Sampler> &sampler, const std::shared_ptr<DatasetCache> &cache);
-  explicit Cifar100Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
+  explicit Cifar100Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, const Sampler *sampler,
                            const std::shared_ptr<DatasetCache> &cache);
   explicit Cifar100Dataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                            const std::reference_wrapper<Sampler> sampler, const std::shared_ptr<DatasetCache> &cache);
@@ -905,7 +908,7 @@ inline std::shared_ptr<Cifar100Dataset> Cifar100(
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current Dataset
 inline std::shared_ptr<Cifar100Dataset> Cifar100(const std::string &dataset_dir, const std::string &usage,
-                                                 Sampler *sampler,
+                                                 const Sampler *sampler,
                                                  const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<Cifar100Dataset>(StringToChar(dataset_dir), StringToChar(usage), sampler, cache);
 }
@@ -964,7 +967,7 @@ class CocoDataset : public Dataset {
               const std::vector<char> &task, const bool &decode, const std::shared_ptr<Sampler> &sampler,
               const std::shared_ptr<DatasetCache> &cache);
   CocoDataset(const std::vector<char> &dataset_dir, const std::vector<char> &annotation_file,
-              const std::vector<char> &task, const bool &decode, Sampler *sampler,
+              const std::vector<char> &task, const bool &decode, const Sampler *sampler,
               const std::shared_ptr<DatasetCache> &cache);
   CocoDataset(const std::vector<char> &dataset_dir, const std::vector<char> &annotation_file,
               const std::vector<char> &task, const bool &decode, const std::reference_wrapper<Sampler> sampler,
@@ -1015,7 +1018,7 @@ inline std::shared_ptr<CocoDataset> Coco(const std::string &dataset_dir, const s
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current Dataset
 inline std::shared_ptr<CocoDataset> Coco(const std::string &dataset_dir, const std::string &annotation_file,
-                                         const std::string &task, const bool &decode, Sampler *sampler,
+                                         const std::string &task, const bool &decode, const Sampler *sampler,
                                          const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<CocoDataset>(StringToChar(dataset_dir), StringToChar(annotation_file), StringToChar(task),
                                        decode, sampler, cache);
@@ -1091,7 +1094,7 @@ class ImageFolderDataset : public Dataset {
                               const std::shared_ptr<Sampler> &sampler, const std::set<std::vector<char>> &extensions,
                               const std::map<std::vector<char>, int32_t> &class_indexing,
                               const std::shared_ptr<DatasetCache> &cache);
-  explicit ImageFolderDataset(const std::vector<char> &dataset_dir, bool decode, Sampler *sampler,
+  explicit ImageFolderDataset(const std::vector<char> &dataset_dir, bool decode, const Sampler *sampler,
                               const std::set<std::vector<char>> &extensions,
                               const std::map<std::vector<char>, int32_t> &class_indexing,
                               const std::shared_ptr<DatasetCache> &cache);
@@ -1136,7 +1139,8 @@ inline std::shared_ptr<ImageFolderDataset> ImageFolder(
 /// \param[in] class_indexing a class name to label map
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current ImageFolderDataset
-inline std::shared_ptr<ImageFolderDataset> ImageFolder(const std::string &dataset_dir, bool decode, Sampler *sampler,
+inline std::shared_ptr<ImageFolderDataset> ImageFolder(const std::string &dataset_dir, bool decode,
+                                                       const Sampler *sampler,
                                                        const std::set<std::string> &extensions = {},
                                                        const std::map<std::string, int32_t> &class_indexing = {},
                                                        const std::shared_ptr<DatasetCache> &cache = nullptr) {
@@ -1170,9 +1174,9 @@ class ManifestDataset : public Dataset {
                            const std::shared_ptr<Sampler> &sampler,
                            const std::map<std::vector<char>, int32_t> &class_indexing, bool decode,
                            const std::shared_ptr<DatasetCache> &cache);
-  explicit ManifestDataset(const std::vector<char> &dataset_file, const std::vector<char> &usage, Sampler *sampler,
-                           const std::map<std::vector<char>, int32_t> &class_indexing, bool decode,
-                           const std::shared_ptr<DatasetCache> &cache);
+  explicit ManifestDataset(const std::vector<char> &dataset_file, const std::vector<char> &usage,
+                           const Sampler *sampler, const std::map<std::vector<char>, int32_t> &class_indexing,
+                           bool decode, const std::shared_ptr<DatasetCache> &cache);
   explicit ManifestDataset(const std::vector<char> &dataset_file, const std::vector<char> &usage,
                            const std::reference_wrapper<Sampler> sampler,
                            const std::map<std::vector<char>, int32_t> &class_indexing, bool decode,
@@ -1212,7 +1216,7 @@ inline std::shared_ptr<ManifestDataset> Manifest(
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current ManifestDataset
 inline std::shared_ptr<ManifestDataset> Manifest(const std::string &dataset_file, const std::string &usage,
-                                                 Sampler *sampler,
+                                                 const Sampler *sampler,
                                                  const std::map<std::string, int32_t> &class_indexing = {},
                                                  bool decode = false,
                                                  const std::shared_ptr<DatasetCache> &cache = nullptr) {
@@ -1242,21 +1246,22 @@ inline std::shared_ptr<ManifestDataset> Manifest(const std::string &dataset_file
 class MindDataDataset : public Dataset {
  public:
   explicit MindDataDataset(const std::vector<char> &dataset_file, const std::vector<std::vector<char>> &columns_list,
-                           const std::shared_ptr<Sampler> &sampler, nlohmann::json *padded_sample, int64_t num_padded);
+                           const std::shared_ptr<Sampler> &sampler, const nlohmann::json *padded_sample,
+                           int64_t num_padded);
   explicit MindDataDataset(const std::vector<char> &dataset_file, const std::vector<std::vector<char>> &columns_list,
-                           Sampler *sampler, nlohmann::json *padded_sample, int64_t num_padded);
+                           const Sampler *sampler, const nlohmann::json *padded_sample, int64_t num_padded);
   explicit MindDataDataset(const std::vector<char> &dataset_file, const std::vector<std::vector<char>> &columns_list,
-                           const std::reference_wrapper<Sampler> sampler, nlohmann::json *padded_sample,
+                           const std::reference_wrapper<Sampler> sampler, const nlohmann::json *padded_sample,
                            int64_t num_padded);
   explicit MindDataDataset(const std::vector<std::vector<char>> &dataset_files,
                            const std::vector<std::vector<char>> &columns_list, const std::shared_ptr<Sampler> &sampler,
-                           nlohmann::json *padded_sample, int64_t num_padded);
+                           const nlohmann::json *padded_sample, int64_t num_padded);
   explicit MindDataDataset(const std::vector<std::vector<char>> &dataset_files,
-                           const std::vector<std::vector<char>> &columns_list, Sampler *sampler,
-                           nlohmann::json *padded_sample, int64_t num_padded);
+                           const std::vector<std::vector<char>> &columns_list, const Sampler *sampler,
+                           const nlohmann::json *padded_sample, int64_t num_padded);
   explicit MindDataDataset(const std::vector<std::vector<char>> &dataset_files,
                            const std::vector<std::vector<char>> &columns_list,
-                           const std::reference_wrapper<Sampler> sampler, nlohmann::json *padded_sample,
+                           const std::reference_wrapper<Sampler> sampler, const nlohmann::json *padded_sample,
                            int64_t num_padded);
   ~MindDataDataset() = default;
 };
@@ -1290,7 +1295,7 @@ inline std::shared_ptr<MindDataDataset> MindData(
 /// \param[in] num_padded Number of padding samples. Dataset size plus num_padded should be divisible by num_shards.
 /// \return Shared pointer to the current MindDataDataset
 inline std::shared_ptr<MindDataDataset> MindData(const std::string &dataset_file,
-                                                 const std::vector<std::string> &columns_list, Sampler *sampler,
+                                                 const std::vector<std::string> &columns_list, const Sampler *sampler,
                                                  nlohmann::json *padded_sample = nullptr, int64_t num_padded = 0) {
   return std::make_shared<MindDataDataset>(StringToChar(dataset_file), VectorStringToChar(columns_list), sampler,
                                            padded_sample, num_padded);
@@ -1340,7 +1345,7 @@ inline std::shared_ptr<MindDataDataset> MindData(
 /// \param[in] num_padded Number of padding samples. Dataset size plus num_padded should be divisible by num_shards.
 /// \return Shared pointer to the current MindDataDataset
 inline std::shared_ptr<MindDataDataset> MindData(const std::vector<std::string> &dataset_files,
-                                                 const std::vector<std::string> &columns_list, Sampler *sampler,
+                                                 const std::vector<std::string> &columns_list, const Sampler *sampler,
                                                  nlohmann::json *padded_sample = nullptr, int64_t num_padded = 0) {
   return std::make_shared<MindDataDataset>(VectorStringToChar(dataset_files), VectorStringToChar(columns_list), sampler,
                                            padded_sample, num_padded);
@@ -1366,7 +1371,7 @@ class MnistDataset : public Dataset {
  public:
   explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                         const std::shared_ptr<Sampler> &sampler, const std::shared_ptr<DatasetCache> &cache);
-  explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
+  explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, const Sampler *sampler,
                         const std::shared_ptr<DatasetCache> &cache);
   explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                         const std::reference_wrapper<Sampler> sampler, const std::shared_ptr<DatasetCache> &cache);
@@ -1395,7 +1400,8 @@ inline std::shared_ptr<MnistDataset> Mnist(const std::string &dataset_dir, const
 /// \param[in] sampler Raw pointer to a sampler object used to choose samples from the dataset.
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current MnistDataset
-inline std::shared_ptr<MnistDataset> Mnist(const std::string &dataset_dir, const std::string &usage, Sampler *sampler,
+inline std::shared_ptr<MnistDataset> Mnist(const std::string &dataset_dir, const std::string &usage,
+                                           const Sampler *sampler,
                                            const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<MnistDataset>(StringToChar(dataset_dir), StringToChar(usage), sampler, cache);
 }
@@ -1560,7 +1566,7 @@ class VOCDataset : public Dataset {
                       bool decode, const std::shared_ptr<Sampler> &sampler, const std::shared_ptr<DatasetCache> &cache);
   explicit VOCDataset(const std::vector<char> &dataset_dir, const std::vector<char> &task,
                       const std::vector<char> &usage, const std::map<std::vector<char>, int32_t> &class_indexing,
-                      bool decode, Sampler *sampler, const std::shared_ptr<DatasetCache> &cache);
+                      bool decode, const Sampler *sampler, const std::shared_ptr<DatasetCache> &cache);
   explicit VOCDataset(const std::vector<char> &dataset_dir, const std::vector<char> &task,
                       const std::vector<char> &usage, const std::map<std::vector<char>, int32_t> &class_indexing,
                       bool decode, const std::reference_wrapper<Sampler> sampler,
@@ -1607,7 +1613,7 @@ inline std::shared_ptr<VOCDataset> VOC(const std::string &dataset_dir, const std
 /// \return Shared pointer to the current Dataset
 inline std::shared_ptr<VOCDataset> VOC(const std::string &dataset_dir, const std::string &task,
                                        const std::string &usage, const std::map<std::string, int32_t> &class_indexing,
-                                       bool decode, Sampler *sampler,
+                                       bool decode, const Sampler *sampler,
                                        const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<VOCDataset>(StringToChar(dataset_dir), StringToChar(task), StringToChar(usage),
                                       MapStringToChar(class_indexing), decode, sampler, cache);
diff --git a/mindspore/ccsrc/minddata/dataset/include/samplers.h b/mindspore/ccsrc/minddata/dataset/include/samplers.h
index 13d39de1581..8fe6d99a7f3 100644
--- a/mindspore/ccsrc/minddata/dataset/include/samplers.h
+++ b/mindspore/ccsrc/minddata/dataset/include/samplers.h
@@ -61,7 +61,7 @@ class Sampler : std::enable_shared_from_this<Sampler> {
  protected:
   /// \brief Pure virtual function to convert a Sampler class into an IR Sampler object.
   /// \return shared pointer to the newly created TensorOperation.
-  virtual std::shared_ptr<SamplerObj> Parse() = 0;
+  virtual std::shared_ptr<SamplerObj> Parse() const = 0;
 
   std::vector<std::shared_ptr<Sampler>> children_;
 };
@@ -89,7 +89,7 @@ class DistributedSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   int64_t num_shards_;
@@ -120,7 +120,7 @@ class PKSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   int64_t num_val_;
@@ -145,7 +145,7 @@ class RandomSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   bool replacement_;
@@ -169,7 +169,7 @@ class SequentialSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   int64_t start_index_;
@@ -193,7 +193,7 @@ class SubsetSampler : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
   std::vector<int64_t> indices_;
   int64_t num_samples_;
@@ -216,7 +216,7 @@ class SubsetRandomSampler final : public SubsetSampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 };
 
 /// \brief A class to represent a Weighted Random Sampler in the data pipeline.
@@ -238,7 +238,7 @@ class WeightedRandomSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   std::vector<double> weights_;
diff --git a/mindspore/ccsrc/minddata/dataset/include/vision.h b/mindspore/ccsrc/minddata/dataset/include/vision.h
index 6b84f4216ed..d3050b32453 100644
--- a/mindspore/ccsrc/minddata/dataset/include/vision.h
+++ b/mindspore/ccsrc/minddata/dataset/include/vision.h
@@ -648,16 +648,17 @@ class RandomSelectSubpolicy final : public TensorTransform {
  public:
   /// \brief Constructor.
   /// \param[in] policy Vector of sub-policies to choose from, in which the TensorTransform objects are raw pointers
-  explicit RandomSelectSubpolicy(std::vector<std::vector<std::pair<TensorTransform *, double>>> policy);
+  explicit RandomSelectSubpolicy(const std::vector<std::vector<std::pair<TensorTransform *, double>>> &policy);
 
   /// \brief Constructor.
   /// \param[in] policy Vector of sub-policies to choose from, in which the TensorTransform objects are shared pointers
-  explicit RandomSelectSubpolicy(std::vector<std::vector<std::pair<std::shared_ptr<TensorTransform>, double>>> policy);
+  explicit RandomSelectSubpolicy(
+    const std::vector<std::vector<std::pair<std::shared_ptr<TensorTransform>, double>>> &policy);
 
   /// \brief Constructor.
   /// \param[in] policy Vector of sub-policies to choose from, in which the TensorTransform objects are object pointers
   explicit RandomSelectSubpolicy(
-    std::vector<std::vector<std::pair<std::reference_wrapper<TensorTransform>, double>>> policy);
+    const std::vector<std::vector<std::pair<std::reference_wrapper<TensorTransform>, double>>> &policy);
 
   /// \brief Destructor.
   ~RandomSelectSubpolicy() = default;
diff --git a/mindspore/ccsrc/minddata/dataset/liteapi/include/datasets.h b/mindspore/ccsrc/minddata/dataset/liteapi/include/datasets.h
index 0e9a8f72832..eadb609d8f3 100644
--- a/mindspore/ccsrc/minddata/dataset/liteapi/include/datasets.h
+++ b/mindspore/ccsrc/minddata/dataset/liteapi/include/datasets.h
@@ -456,7 +456,7 @@ class AlbumDataset : public Dataset {
                const std::vector<std::vector<char>> &column_names, bool decode, const std::shared_ptr<Sampler> &sampler,
                const std::shared_ptr<DatasetCache> &cache);
   AlbumDataset(const std::vector<char> &dataset_dir, const std::vector<char> &data_schema,
-               const std::vector<std::vector<char>> &column_names, bool decode, Sampler *sampler,
+               const std::vector<std::vector<char>> &column_names, bool decode, const Sampler *sampler,
                const std::shared_ptr<DatasetCache> &cache);
   AlbumDataset(const std::vector<char> &dataset_dir, const std::vector<char> &data_schema,
                const std::vector<std::vector<char>> &column_names, bool decode,
@@ -493,7 +493,8 @@ inline std::shared_ptr<AlbumDataset> Album(const std::string &dataset_dir, const
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current Dataset
 inline std::shared_ptr<AlbumDataset> Album(const std::string &dataset_dir, const std::string &data_schema,
-                                           const std::vector<std::string> &column_names, bool decode, Sampler *sampler,
+                                           const std::vector<std::string> &column_names, bool decode,
+                                           const Sampler *sampler,
                                            const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<AlbumDataset>(StringToChar(dataset_dir), StringToChar(data_schema),
                                         VectorStringToChar(column_names), decode, sampler, cache);
@@ -519,7 +520,7 @@ class MnistDataset : public Dataset {
  public:
   explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                         const std::shared_ptr<Sampler> &sampler, const std::shared_ptr<DatasetCache> &cache);
-  explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, Sampler *sampler,
+  explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage, const Sampler *sampler,
                         const std::shared_ptr<DatasetCache> &cache);
   explicit MnistDataset(const std::vector<char> &dataset_dir, const std::vector<char> &usage,
                         const std::reference_wrapper<Sampler> sampler, const std::shared_ptr<DatasetCache> &cache);
@@ -548,7 +549,8 @@ inline std::shared_ptr<MnistDataset> Mnist(const std::string &dataset_dir, const
 /// \param[in] sampler Raw pointer to a sampler object used to choose samples from the dataset.
 /// \param[in] cache Tensor cache to use. (default=nullptr which means no cache is used).
 /// \return Shared pointer to the current MnistDataset
-inline std::shared_ptr<MnistDataset> Mnist(const std::string &dataset_dir, const std::string &usage, Sampler *sampler,
+inline std::shared_ptr<MnistDataset> Mnist(const std::string &dataset_dir, const std::string &usage,
+                                           const Sampler *sampler,
                                            const std::shared_ptr<DatasetCache> &cache = nullptr) {
   return std::make_shared<MnistDataset>(StringToChar(dataset_dir), StringToChar(usage), sampler, cache);
 }
diff --git a/mindspore/ccsrc/minddata/dataset/liteapi/include/samplers.h b/mindspore/ccsrc/minddata/dataset/liteapi/include/samplers.h
index 13d39de1581..8fe6d99a7f3 100644
--- a/mindspore/ccsrc/minddata/dataset/liteapi/include/samplers.h
+++ b/mindspore/ccsrc/minddata/dataset/liteapi/include/samplers.h
@@ -61,7 +61,7 @@ class Sampler : std::enable_shared_from_this<Sampler> {
  protected:
   /// \brief Pure virtual function to convert a Sampler class into an IR Sampler object.
   /// \return shared pointer to the newly created TensorOperation.
-  virtual std::shared_ptr<SamplerObj> Parse() = 0;
+  virtual std::shared_ptr<SamplerObj> Parse() const = 0;
 
   std::vector<std::shared_ptr<Sampler>> children_;
 };
@@ -89,7 +89,7 @@ class DistributedSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   int64_t num_shards_;
@@ -120,7 +120,7 @@ class PKSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   int64_t num_val_;
@@ -145,7 +145,7 @@ class RandomSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   bool replacement_;
@@ -169,7 +169,7 @@ class SequentialSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   int64_t start_index_;
@@ -193,7 +193,7 @@ class SubsetSampler : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
   std::vector<int64_t> indices_;
   int64_t num_samples_;
@@ -216,7 +216,7 @@ class SubsetRandomSampler final : public SubsetSampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 };
 
 /// \brief A class to represent a Weighted Random Sampler in the data pipeline.
@@ -238,7 +238,7 @@ class WeightedRandomSampler final : public Sampler {
  protected:
   /// \brief Function to convert a Sampler into an IR SamplerObj.
   /// \return shared pointer to the newly created SamplerObj.
-  std::shared_ptr<SamplerObj> Parse() override;
+  std::shared_ptr<SamplerObj> Parse() const override;
 
  private:
   std::vector<double> weights_;
diff --git a/tests/ut/cpp/dataset/c_api_samplers_test.cc b/tests/ut/cpp/dataset/c_api_samplers_test.cc
index dd0604a73ab..f079a68a0d3 100644
--- a/tests/ut/cpp/dataset/c_api_samplers_test.cc
+++ b/tests/ut/cpp/dataset/c_api_samplers_test.cc
@@ -207,6 +207,33 @@ TEST_F(MindDataTestPipeline, TestDistributedSamplerSuccess3) {
   iter->Stop();
 }
 
+TEST_F(MindDataTestPipeline, TestDistributedSamplerSuccess4) {
+  MS_LOG(INFO) << "Doing MindDataTestPipeline-TestDistributedSamplerSuccess4.";
+  // Test pointer of distributed_sampler
+  SequentialSampler sampler = SequentialSampler(0, 4);
+
+  // Create an ImageFolder Dataset
+  std::string folder_path = datasets_root_path_ + "/testVOC2012_2";
+  std::shared_ptr<Dataset> ds = VOC(folder_path, "Detection", "train", {}, false, &sampler);
+  EXPECT_NE(ds, nullptr);
+
+  // Iterate the dataset and get each row
+  std::shared_ptr<Iterator> iter = ds->CreateIterator();
+  EXPECT_NE(iter, nullptr);
+  std::unordered_map<std::string, mindspore::MSTensor> row;
+  iter->GetNextRow(&row);
+
+  uint64_t i = 0;
+  while (row.size() != 0) {
+    i++;
+    auto label = row["label"];
+    iter->GetNextRow(&row);
+  }
+
+  EXPECT_EQ(i, 4);
+  iter->Stop();
+}
+
 TEST_F(MindDataTestPipeline, TestDistributedSamplerFail1) {
   MS_LOG(INFO) << "Doing MindDataTestPipeline-TestDistributedSamplerFail1.";
   // Test basic setting of distributed_sampler