Class LinearScoreEvalOperator

java.lang.Object
org.elasticsearch.compute.operator.fuse.LinearScoreEvalOperator
All Implemented Interfaces:
Closeable, AutoCloseable, Operator, org.elasticsearch.core.Releasable

public class LinearScoreEvalOperator extends Object implements Operator
Updates the score column in two stages: 1. Normalizes the scores using the normalization method specified in the config. Each row belongs to a result group that is specified by the discriminator column. Scores are normalized for each result group. 2. Multiplies the normalized score by the weight specified in the config. The config contains the weights that we need to apply for each result group.
  • Constructor Details

    • LinearScoreEvalOperator

      public LinearScoreEvalOperator(DriverContext driverContext, int discriminatorPosition, int scorePosition, LinearConfig config, String sourceText, int sourceLine, int sourceColumn)
  • Method Details

    • needsInput

      public boolean needsInput()
      Description copied from interface: Operator
      whether the given operator can accept more input pages
      Specified by:
      needsInput in interface Operator
    • addInput

      public void addInput(Page page)
      Description copied from interface: Operator
      adds an input page to the operator. only called when needsInput() == true and isFinished() == false
      Specified by:
      addInput in interface Operator
    • finish

      public void finish()
      Description copied from interface: Operator
      notifies the operator that it won't receive any more input pages
      Specified by:
      finish in interface Operator
    • isFinished

      public boolean isFinished()
      Description copied from interface: Operator
      whether the operator has finished processing all input pages and made the corresponding output pages available
      Specified by:
      isFinished in interface Operator
    • getOutput

      public Page getOutput()
      Description copied from interface: Operator
      returns non-null if output page available. Only called when isFinished() == false
      Specified by:
      getOutput in interface Operator
    • close

      public void close()
      Description copied from interface: Operator
      notifies the operator that it won't be used anymore (i.e. none of the other methods called), and its resources can be cleaned up
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Specified by:
      close in interface Operator
      Specified by:
      close in interface org.elasticsearch.core.Releasable
    • toString

      public String toString()
      Overrides:
      toString in class Object
    • status

      public Operator.Status status()
      Description copied from interface: Operator
      The status of the operator.
      Specified by:
      status in interface Operator