text: /*******************************************************************************
   * Copyright (c) 2015-2018 Skymind, Inc.
   *
   * This program and the accompanying materials are made available under the
   * terms of the Apache License, Version 2.0 which is available at
   * https://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.
   *
   * SPDX-License-Identifier: Apache-2.0
   ******************************************************************************/
  
  package org.deeplearning4j.spark.models.sequencevectors.functions;
  
  import lombok.NonNull;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.spark.api.java.function.Function;
  import org.apache.spark.broadcast.Broadcast;
  import org.deeplearning4j.models.embeddings.loader.VectorsConfiguration;
  import org.deeplearning4j.models.sequencevectors.sequence.Sequence;
  import org.deeplearning4j.models.word2vec.VocabWord;
  
  import java.util.List;
  
  /**
   * @author raver119@gmail.com
   */
  @Slf4j
  public class TokenizerFunction extends BaseTokenizerFunction implements Function<String, Sequence<VocabWord>> {
  
      public TokenizerFunction(@NonNull Broadcast<VectorsConfiguration> configurationBroadcast) {
          super(configurationBroadcast);
      }
  
  
      @Override
      public Sequence<VocabWord> call(String s) throws Exception {
          if (tokenizerFactory == null)
              instantiateTokenizerFactory();
  
          List<String> tokens = tokenizerFactory.create(s).getTokens();
          Sequence<VocabWord> seq = new Sequence<>();
          for (String token : tokens) {
              if (token == null || token.isEmpty())
                  continue;
  
              seq.addElement(new VocabWord(1.0, token));
          }
  
          return seq;
      }
  }
  