Package weka.core.pmml
Class Constant
- java.lang.Object
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- weka.core.pmml.Expression
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- weka.core.pmml.Constant
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- 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
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Constructor Summary
Constructors Constructor Description Constant(org.w3c.dom.Element constant, FieldMetaInfo.Optype opType, java.util.ArrayList<Attribute> fieldDefs)
Construct an new Constant Expression.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description double
getResult(double[] incoming)
Get the result of evaluating the expression.java.lang.String
getResultCategorical(double[] incoming)
Gets the result of evaluating the expression when the optype is categorical or ordinal as the actual String value.static void
main(java.lang.String[] args)
java.lang.String
toString(java.lang.String pad)
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Methods inherited from class weka.core.pmml.Expression
getExpression, getExpression, getFieldDef, getFieldDefIndex, getOptype, getResultContinuous, setFieldDefs, toString
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Constructor Detail
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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 ConstantopType
- the optype for the ConstantfieldDefs
- 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
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Method Detail
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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 classExpression
- Parameters:
incoming
- the incoming parameter values- Returns:
- the result of evaluating the expression
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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 classExpression
- Parameters:
incoming
- the incoming parameter values- Returns:
- the result of evaluating the expression
- Throws:
java.lang.Exception
- if the optype is continuous
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main
public static void main(java.lang.String[] args)
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toString
public java.lang.String toString(java.lang.String pad)
- Overrides:
toString
in classExpression
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