Package weka.core.pmml

Class Constant

  • All Implemented Interfaces:
    java.io.Serializable
    public class Constant
extends Expression
    Class encapsulating a Constant Expression.
    Version:
    $Revision 1.0 $
    Author:
    Mark Hall (mhall{[at]}pentaho{[dot]}com
    See Also:
    Serialized Form

    • Constructor Detail

      • Constant

        public Constant​(org.w3c.dom.Element constant,
                FieldMetaInfo.Optype opType,
                java.util.ArrayList<Attribute> fieldDefs)
         throws java.lang.Exception
        Construct an new Constant Expression.
        Parameters:
        constant - the xml Element containing the Constant
        opType - the optype for the Constant
        fieldDefs - an ArrayList of Attributes for the fields that this Expression might need to access (not needed for a constant!)
        Throws:
        java.lang.Exception - if the optype is specified as continuous and there is a problem parsing the value of the Constant

    • Method Detail

      • getResult

        public double getResult​(double[] incoming)
        Get the result of evaluating the expression. In the case of a continuous optype, a real number is returned; in the case of a categorical/ordinal optype, the index of the nominal value is returned as a double.
        Specified by:
        getResult in class Expression
        Parameters:
        incoming - the incoming parameter values
        Returns:
        the result of evaluating the expression

      • getResultCategorical

        public java.lang.String getResultCategorical​(double[] incoming)
                                      throws java.lang.Exception
        Gets the result of evaluating the expression when the optype is categorical or ordinal as the actual String value.
        Specified by:
        getResultCategorical in class Expression
        Parameters:
        incoming - the incoming parameter values
        Returns:
        the result of evaluating the expression
        Throws:
        java.lang.Exception - if the optype is continuous

      • main

        public static void main​(java.lang.String[] args)

      • toString

        public java.lang.String toString​(java.lang.String pad)
        Overrides:
        toString in class Expression