text: """
   Copyright (C) 2018-2021 Intel Corporation
  
   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.
  """
  import numpy as np
  
  from extensions.ops.splice import Splice
  from mo.front.extractor import FrontExtractorOp
  from mo.front.kaldi.loader.utils import find_next_tag, read_placeholder, read_binary_integer32_token, \
      collect_until_whitespace
  from mo.front.kaldi.utils import read_binary_vector
  from mo.utils.error import Error
  
  
  class SpliceFrontExtractor(FrontExtractorOp):
      op = 'splicecomponent'
      enabled = True
  
      @classmethod
      def extract(cls, node):
          pb = node.parameters
          mapping_rule = {
              'context': list()
          }
          tag = find_next_tag(pb)
          if tag == '<LeftContext>':
              read_placeholder(pb, 1)
              l_context = read_binary_integer32_token(pb)
              tag = find_next_tag(pb)
              if tag != '<RightContext>':
                  raise Error('Unknown token {} in SpliceComponent node {}'.format(tag, node.id))
              read_placeholder(pb, 1)
              r_context = read_binary_integer32_token(pb)
              for i in range(-l_context, r_context + 1):
                  mapping_rule['context'].append(i)
          elif tag == '<Context>':
              collect_until_whitespace(pb)
              mapping_rule['context'] = read_binary_vector(pb, False, dtype=np.int32)
          else:
              raise Error('Unknown token {} in SpliceComponent node {}'.format(tag, node.id))
  
          tag = find_next_tag(pb)
          if tag == '<ConstComponentDim>':
              read_placeholder(pb, 1)
              const_dim = read_binary_integer32_token(pb)
              mapping_rule['const_dim'] = const_dim
  
          Splice.update_node_stat(node, mapping_rule)
          return cls.enabled
  