Package com.yahoo.search.grouping.request

Class ArrayAtLookup

java.lang.Object
com.yahoo.search.grouping.request.GroupingNode
com.yahoo.search.grouping.request.GroupingExpression
com.yahoo.search.grouping.request.DocumentValue
com.yahoo.search.grouping.request.ArrayAtLookup
public class ArrayAtLookup extends DocumentValue
Represents access of array element in a document attribute in a GroupingExpression. The first argument should be the name of an array attribute in the input Hit, while the second argument is evaluated as an integer and used as the index in that array. If the index argument is less than 0 returns the first array element; if the index is greater than or equal to size(array) returns the last array element; if the array is empty returns 0 (or NaN?).
Author:
arnej27959

  • Constructor Details

    • ArrayAtLookup

      public ArrayAtLookup(String attributeName, GroupingExpression indexArg)
      Constructs a new instance of this class.
      Parameters:
      attributeName - the attribute name to assign to this.

  • Method Details

    • copy

      public ArrayAtLookup copy()
      Description copied from class: GroupingExpression
      Returns a deep copy of this
      Specified by:
      copy in class GroupingExpression

    • getAttributeName

      public String getAttributeName()
      Returns the name of the attribute to retrieve from the input hit

    • getIndexArgument

      public GroupingExpression getIndexArgument()
      Return the expression to evaluate before indexing