code: def import_batch_and_compare_to_json(
      self, json_path, num_batch, c_array_ptr
  ):
      json_file = self.java_io.File(json_path)
      with self.java_arrow.vector.ipc.JsonFileReader(
          json_file, self.java_allocator
      ) as json_reader:
          schema = json_reader.start()
          if num_batch > 0:
              actually_skipped = json_reader.skip(num_batch)
              assert actually_skipped == num_batch
          with json_reader.read() as batch:
              with self.java_arrow.vector.VectorSchemaRoot.create(
                  schema, self.java_allocator
              ) as imported_batch:
                  # We need to pass a dict provider primed with dictionary ids
                  # matching those in the schema, hence an empty
                  # CDataDictionaryProvider would not work here.
                  dict_provider = (
                      self.java_arrow.vector.dictionary.DictionaryProvider.MapDictionaryProvider()
                  )
                  dict_provider.copyStructureFrom(
                      json_reader, self.java_allocator
                  )
                  with dict_provider:
                      self.java_arrow.c.Data.importIntoVectorSchemaRoot(
                          self.java_allocator,
                          self._wrap_c_array_ptr(c_array_ptr),
                          imported_batch,
                          dict_provider,
                      )
                      self._assert_batches_equal(batch, imported_batch)
                      self._assert_dict_providers_equal(
                          json_reader, dict_provider
                      )
  
imports: import contextlib
  import functools
  import os
  import subprocess
  from .None import cdata
  from .tester import Tester, CDataExporter, CDataImporter
  from .util import run_cmd, log
  from ..utils.source import ARROW_ROOT_DEFAULT
label_desc: Use image node_id 2 for calling the JavaCDataImporter obj's underlying member method code with example usage: obj.import_batch_and_compare_to_json(json_path, num_batch, c_array_ptr) without return types