Package com.yahoo.searchlib.rankingexpression.evaluation.gbdtoptimization

Class GBDTForestNode

  • All Implemented Interfaces:
    java.io.Serializable
    public class GBDTForestNode
extends ExpressionNode
    An optimized version of a sum of consecutive decision trees.
    Author:
    bratseth
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      GBDTForestNode​(double[] values)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      Value evaluate​(Context context)
      Returns the value of evaluating this expression over the given context.
      java.lang.StringBuilder toString​(java.lang.StringBuilder string, SerializationContext context, java.util.Deque<java.lang.String> path, CompositeNode parent)
      Returns (optimized sum of condition trees)
      com.yahoo.tensor.TensorType type​(com.yahoo.tensor.evaluation.TypeContext<Reference> context)
      Returns the type this will return if evaluated with the given context.

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • GBDTForestNode

        public GBDTForestNode​(double[] values)

    • Method Detail

      • type

        public final com.yahoo.tensor.TensorType type​(com.yahoo.tensor.evaluation.TypeContext<Reference> context)
        Description copied from class: ExpressionNode
        Returns the type this will return if evaluated with the given context.
        Specified by:
        type in class ExpressionNode
        Parameters:
        context - the variable type bindings to use for this evaluation

      • evaluate

        public final Value evaluate​(Context context)
        Description copied from class: ExpressionNode
        Returns the value of evaluating this expression over the given context.
        Specified by:
        evaluate in class ExpressionNode
        Parameters:
        context - the variable bindings to use for this evaluation

      • toString

        public java.lang.StringBuilder toString​(java.lang.StringBuilder string,
                                        SerializationContext context,
                                        java.util.Deque<java.lang.String> path,
                                        CompositeNode parent)
        Returns (optimized sum of condition trees)
        Specified by:
        toString in class ExpressionNode
        Parameters:
        string - the StringBuilder that will be appended to
        context - the serialization context
        path - the call path to this, used for cycle detection, or null if this is a root
        parent - the parent node of this, or null if it a root
        Returns:
        the main script, referring to script instances.