net.sf.tweety.math.term

Class FunctionalTerm

java.lang.Object

net.sf.tweety.math.term.Term

net.sf.tweety.math.term.FunctionalTerm

Direct Known Subclasses:

AbsoluteValue, Exp, Logarithm, Power, Root

public abstract class FunctionalTerm
extends Term

Instances of this class represent a functional term on some inner term.

Author:

Matthias Thimm

Constructor Summary

Constructors

Constructor and Description
FunctionalTerm(Term term) Creates a new functional term with the given inner term.

Method Summary

Modifier and Type	Method and Description
void	collapseAssociativeOperations() This method collapses all associative operations appearing in this term, e.g.
void	expandAssociativeOperations() This method expands all associative operations appearing in this term, e.g.
Set<AbsoluteValue>	getAbsoluteValues() Returns all absolute values of this term.
Set<Maximum>	getMaximums() Returns all maximums of this term.
Set<Minimum>	getMinimums() Returns all minimums of this term.
Set<Product>	getProducts() Returns all products of this term.
Term	getTerm() Returns the inner term.
Set<Variable>	getVariables() Returns all variables in this term.
boolean	isInteger() Checks whether this term represents an integer value.
abstract Term	replaceTerm(Term toSubstitute, Term substitution) Replaces each occurrence of "toSubstitute" by "substitution" and return the new term.
Sum	toLinearForm() Converts this term into a linear normal form, i.e.
abstract String	toString()
abstract Constant	value() Computes the actual value of this term if it contains no variables.

Methods inherited from class net.sf.tweety.math.term.Term

add, derive, doubleValue, evaluateMatrix, evaluateVector, evaluateVector, isContinuous, isContinuous, isLinear, min, minus, mult, replaceAllTerms, replaceAllTerms, simplify

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionalTerm

public FunctionalTerm(Term term)

Creates a new functional term with the given inner term.

Parameters:

term - a term

Method Detail

getTerm

public Term getTerm()

Returns the inner term.

Returns:

the inner term.

collapseAssociativeOperations

public void collapseAssociativeOperations()

Description copied from class: Term

This method collapses all associative operations appearing in this term, e.g. every min{min{a,b},c} becomes min{a,b,c}.

Specified by:

collapseAssociativeOperations in class Term

expandAssociativeOperations

public void expandAssociativeOperations()

Description copied from class: Term

This method expands all associative operations appearing in this term, e.g. every min{a,b,c} becomes min{min{a,b},c}.

Specified by:

expandAssociativeOperations in class Term

getMinimums

public Set<Minimum> getMinimums()

Description copied from class: Term

Returns all minimums of this term.

Specified by:

getMinimums in class Term

Returns:

all minimums of this term.

getMaximums

public Set<Maximum> getMaximums()

Description copied from class: Term

Returns all maximums of this term.

Specified by:

getMaximums in class Term

Returns:

all maximums of this term.

getProducts

public Set<Product> getProducts()

Description copied from class: Term

Returns all products of this term.

Specified by:

getProducts in class Term

Returns:

all products of this term.

getVariables

public Set<Variable> getVariables()

Description copied from class: Term

Returns all variables in this term.

Specified by:

getVariables in class Term

Returns:

all variables in this term.

getAbsoluteValues

public Set<AbsoluteValue> getAbsoluteValues()

Description copied from class: Term

Returns all absolute values of this term.

Specified by:

getAbsoluteValues in class Term

Returns:

all absolute values of this term.

isInteger

public boolean isInteger()

Description copied from class: Term

Checks whether this term represents an integer value.

Specified by:

isInteger in class Term

Returns:

"true" iff this term represents an integer value.

toLinearForm

public Sum toLinearForm()
                 throws IllegalArgumentException

Description copied from class: Term

Converts this term into a linear normal form, i.e. into a sum of products of a constant and a variable.

Specified by:

toLinearForm in class Term

Returns:

a term in linear normal form.

Throws:

IllegalArgumentException - if this term cannot be converted into a linear normal form.

replaceTerm

public abstract Term replaceTerm(Term toSubstitute,
                                 Term substitution)

Description copied from class: Term

Replaces each occurrence of "toSubstitute" by "substitution" and return the new term.

Specified by:

replaceTerm in class Term

Parameters:

toSubstitute - the term to be substituted

substitution - the new term

Returns:

this term where "toSubstitute" is replaced by "substitution"

toString

public abstract String toString()

Specified by:

toString in class Term

value

public abstract Constant value()
                        throws IllegalArgumentException

Description copied from class: Term

Computes the actual value of this term if it contains no variables.

Specified by:

value in class Term

Returns:

the value of this term, either a float or an integer.

Throws:

IllegalArgumentException - if this term contains at least on variable.