Class NormDiscrete

  • All Implemented Interfaces:
    java.io.Serializable

    public class NormDiscrete
    extends Expression
    Class encapsulating a NormDiscrete Expression. Creates an indicator for a particular discrete value.
    Version:
    $Revision 1.0 $
    Author:
    Mark Hall (mhall{[at]}pentaho{[dot]}com)
    See Also:
    Serialized Form
    • Constructor Detail

      • NormDiscrete

        public NormDiscrete​(org.w3c.dom.Element normDisc,
                            FieldMetaInfo.Optype opType,
                            java.util.ArrayList<Attribute> fieldDefs)
                     throws java.lang.Exception
        Constructor. Reads the field name and field value for this NormDiscrete Expression.
        Parameters:
        normDisc - the Element encapsulating this NormDiscrete
        opType - the optype for this expression (taken from either the enclosing DefineFunction or DerivedField)
        fieldDefs - an ArrayList of Attributes for the fields that this Expression might need to access enclosing DefineFunction or DerivedField)
        Throws:
        java.lang.Exception - if there is a problem parsing this Apply Expression
    • Method Detail

      • setFieldDefs

        public void setFieldDefs​(java.util.ArrayList<Attribute> fieldDefs)
                          throws java.lang.Exception
        Set the field definitions for this Expression to use
        Overrides:
        setFieldDefs in class Expression
        Parameters:
        fieldDefs - the field definitions to use
        Throws:
        java.lang.Exception - if there is a problem setting the field definitions
      • getResult

        public double getResult​(double[] incoming)
                         throws java.lang.Exception
        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
        Throws:
        java.lang.Exception - if there is a problem computing the result
      • getResultCategorical

        public java.lang.String getResultCategorical​(double[] incoming)
                                              throws java.lang.Exception
        Always throws an Exception since the result of NormDiscrete must be continuous.
        Specified by:
        getResultCategorical in class Expression
        Parameters:
        incoming - the incoming parameter values
        Returns:
        the result of evaluating the expression
        Throws:
        java.lang.Exception - always
      • toString

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