org.ai_heuristic.functs.learn

Class FunctionConstantFactor

java.lang.Object

org.ai_heuristic.functs.Function

org.ai_heuristic.functs.FunctionSingle

org.ai_heuristic.functs.FunctionLearn

org.ai_heuristic.functs.learn.FunctionConstantFactor

All Implemented Interfaces:

FunctionDef, FunctionSingleDef

public class FunctionConstantFactor
extends FunctionLearn

This function simply returns the constant value as a Double object, without any changes. The c value should be added as config parameter, with the key values of AiHeuristicConst.CFC. To use it, you can even pass an empty value, as only the constant value gets returned. This has been added as part of the som package, with the intention that it can be used more generally.

Author:

Kieran Greer

Field Summary

Fields inherited from class org.ai_heuristic.functs.Function

config, mathCompare, valueType

Constructor Summary

Constructors

Constructor and Description
FunctionConstantFactor() Create a new instance of FunctionConstantFactor.
FunctionConstantFactor(java.lang.String thisValueType, java.util.HashMap<java.lang.String,?> thisConfig) Create a new instance of FunctionConstantFactor.

Method Summary

Modifier and Type	Method and Description
double	evaluate(double value) Return a value based on the function evaluation.
ReplySet	evaluate(MetricDataset dataset) Return a value based on the function evaluation.
protected void	initialise() Initialise the function values, setting the config parameters or other.
Function	newInstance() Create and return a new instance of the function, initialised with this function's value type valueType and math evaluator mathCompare.

Methods inherited from class org.ai_heuristic.functs.FunctionSingle

evaluateSingle

Methods inherited from class org.ai_heuristic.functs.Function

checkValueType, createFunction, createFunction, createFunction, getConfigParams, innerObject, isLegalNumber, setConfigParams, setEvaluator, setValueType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FunctionConstantFactor

public FunctionConstantFactor()
                       throws java.lang.Exception

Create a new instance of FunctionConstantFactor.

Throws:

java.lang.Exception - any error.

FunctionConstantFactor

public FunctionConstantFactor(java.lang.String thisValueType,
                              java.util.HashMap<java.lang.String,?> thisConfig)
                       throws java.lang.Exception

Create a new instance of FunctionConstantFactor.

Parameters:

thisValueType - the type of object being evaluated.

thisConfig - list of initialisation function-specific parameters.

Throws:

java.lang.Exception - any error.

Method Detail

initialise

protected void initialise()
                   throws java.lang.Exception

Initialise the function values, setting the config parameters or other.

Specified by:

initialise in class Function

Throws:

java.lang.Exception - any error.

evaluate

public ReplySet evaluate(MetricDataset dataset)
                  throws java.lang.Exception

Return a value based on the function evaluation. This function simply returns the first value in the dataset as is, without any changes.

Specified by:

evaluate in interface FunctionDef

Specified by:

evaluate in class FunctionSingle

Parameters:

dataset - a dataset with the value to evaluate.

Returns:

the first value in the dataset.

Throws:

java.lang.Exception - any error.

evaluate

public double evaluate(double value)
                throws java.lang.Exception

Return a value based on the function evaluation. This function simply returns the value as is, without any changes.

Parameters:

value - the value to evaluate.

Returns:

the value itself.

Throws:

java.lang.Exception - any error.

newInstance

public Function newInstance()
                     throws java.lang.Exception

Create and return a new instance of the function, initialised with this function's value type valueType and math evaluator mathCompare.

Returns:

a new instance of this function.

Throws:

java.lang.Exception - any error.