com.johnsnowlabs.nlp.annotators.common.TokenizedWithSentence.scala Maven / Gradle / Ivy

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/*
 * Copyright 2017-2022 John Snow Labs
 *
 * 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.
 */

package com.johnsnowlabs.nlp.annotators.common

import com.johnsnowlabs.nlp.{Annotation, AnnotatorType}

object TokenizedWithSentence extends Annotated[TokenizedSentence] {

  override def annotatorType: String = AnnotatorType.TOKEN

  override def unpack(annotations: Seq[Annotation]): Seq[TokenizedSentence] = {
    val tokens = annotations
      .filter(_.annotatorType == annotatorType)
      .toArray

    val sentences = SentenceSplit.unpack(annotations)

    /** // Evaluate whether to enable this validation to check proper usage of DOCUMENT and
      * SENTENCE within entire pipelines require(tokens.map(_.metadata.getOrElse("sentence",
      * "0").toInt).distinct.length == sentences.length, "Inconsistencies found in pipeline.
      * Tokens in sentences does not match with sentence count")
      */
    sentences
      .map(sentence => {
        val sentenceTokens = tokens
          .filter(token => token.begin >= sentence.start & token.end <= sentence.end)
          .map(token => IndexedToken(token.result, token.begin, token.end))
        sentenceTokens
      })
      .zipWithIndex
      .map { case (indexedTokens, index) => TokenizedSentence(indexedTokens, index) }
      .filter(_.indexedTokens.nonEmpty)
  }

  override def pack(sentences: Seq[TokenizedSentence]): Seq[Annotation] = {
    sentences.flatMap { sentence =>
      sentence.indexedTokens.map { token =>
        Annotation(
          annotatorType,
          token.begin,
          token.end,
          token.token,
          Map("sentence" -> sentence.sentenceIndex.toString))
      }
    }
  }
}