!2027 Fix compile error

Merge pull request !2027 from JesseKLee/sampler

mindspore/ccsrc/dataset/engine/datasetops/source/coco_op.cc

@@ -153,7 +153,7 @@ Status CocoOp::TraverseSampleIds(const std::shared_ptr<Tensor> &sample_ids, std:
 Status CocoOp::operator()() {
   RETURN_IF_NOT_OK(LaunchThreadsAndInitOp());
   std::unique_ptr<DataBuffer> sampler_buffer;
-  RETURN_IF_NOT_OK(sampler_->GetNextBuffer(&sampler_buffer));
+  RETURN_IF_NOT_OK(sampler_->GetNextSample(&sampler_buffer));
   while (true) {
     std::vector<int64_t> keys;
     keys.reserve(rows_per_buffer_);
@@ -164,7 +164,7 @@ Status CocoOp::operator()() {
         RETURN_STATUS_UNEXPECTED("Sampler Tensor isn't int64");
       }
       RETURN_IF_NOT_OK(TraverseSampleIds(sample_ids, &keys));
-      RETURN_IF_NOT_OK(sampler_->GetNextBuffer(&sampler_buffer));
+      RETURN_IF_NOT_OK(sampler_->GetNextSample(&sampler_buffer));
     }
     if (keys.empty() == false) {
       RETURN_IF_NOT_OK(io_block_queues_[(buf_cnt_++) % num_workers_]->Add(
@@ -185,7 +185,7 @@ Status CocoOp::operator()() {
         io_block_queues_[(buf_cnt_++) % num_workers_]->Add(std::make_unique<IOBlock>(IOBlock::kDeIoBlockFlagEoe)));
       RETURN_IF_NOT_OK(wp_.Wait());
       wp_.Clear();
-      RETURN_IF_NOT_OK(sampler_->GetNextBuffer(&sampler_buffer));
+      RETURN_IF_NOT_OK(sampler_->GetNextSample(&sampler_buffer));
     }
   }
 }