Package org.tweetyproject.math.equation

Class Inequation

java.lang.Object

org.tweetyproject.math.term.OptProbElement

org.tweetyproject.math.equation.Statement

org.tweetyproject.math.equation.Inequation

public class Inequation
extends Statement

This class models an inequation of two terms.

Author:

Matthias Thimm

Field Summary

Fields

Modifier and Type	Field	Description
static final int	GREATER	greater
static final int	GREATER_EQUAL	greater or equal
static final int	LESS	less
static final int	LESS_EQUAL	less or equal
static final int	UNEQUAL	unequal

Constructor Summary

Constructors

Constructor	Description
Inequation(Term leftTerm, Term rightTerm, int type)	Creates a new inequation of the given type with the two terms.

Method Summary

Modifier and Type	Method	Description
String	getRelationSymbol()	Returns the relation symbol of this statement.
int	getType()	Returns the type of this inequation.
boolean	isNormalized()	Checks whether this constraint is of normalized form, i.e.
boolean	isValid(Statement s)	checks if a Statement fulfills the relation
Statement	replaceTerm(Term toSubstitute, Term substitution)	Replaces each occurrence of "toSubstitute" by "substitution" and return the new statement.
Statement	toLinearForm()	Brings both terms into linear form.
Statement	toNormalizedForm()	Normalizes this constraint, i.e.

Methods inherited from class org.tweetyproject.math.equation.Statement

collapseAssociativeOperations, expandAssociativeOperations, getAbsoluteValues, getLeftTerm, getMaximums, getMinimums, getRightTerm, replaceAllTerms, setLeftTerm, setRightTerm, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

LESS

public static final int LESS

less

See Also:

• Constant Field Values

LESS_EQUAL

public static final int LESS_EQUAL

less or equal

See Also:

• Constant Field Values

GREATER

public static final int GREATER

greater

See Also:

• Constant Field Values

GREATER_EQUAL

public static final int GREATER_EQUAL

greater or equal

See Also:

• Constant Field Values

UNEQUAL

public static final int UNEQUAL

unequal

See Also:

• Constant Field Values

Constructor Details

Inequation

public Inequation(Term leftTerm,
 Term rightTerm,
 int type)

Creates a new inequation of the given type with the two terms.

Parameters:

leftTerm - a term.

rightTerm - a term.

type - the type of the inequality, one of Inequation.LESS, Inequation.LESS_EQUAL Inequation.GREATER, Inequation.GREATER_EQUAL, Inequation.UNEQUAL.

Method Details

replaceTerm

public Statement replaceTerm(Term toSubstitute,
 Term substitution)

Description copied from class: Statement

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

Specified by:

replaceTerm in class Statement

Parameters:

toSubstitute - the term to be substituted

substitution - the new term

Returns:

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

getType

public int getType()

Returns the type of this inequation.

Returns:

the type of this inequation.

isNormalized

public boolean isNormalized()

Description copied from class: Statement

Checks whether this constraint is of normalized form, i.e. whether it has the form "T > 0" or "T >= 0", "T = 0" or "T != 0"

Specified by:

isNormalized in class Statement

Returns:

"true" iff this constraint is normalized.

toNormalizedForm

public Statement toNormalizedForm()

Description copied from class: Statement

Normalizes this constraint, i.e. brings it into an equivalent form "T > 0" or "T >= 0", "T = 0" or "T != 0".

Specified by:

toNormalizedForm in class Statement

Returns:

a statement.

toLinearForm

public Statement toLinearForm()

Description copied from class: Statement

Brings both terms into linear form. If this constraint is normalized (i.e. the right term consists of the constant 0) the right term is not linearized.

Specified by:

toLinearForm in class Statement

Returns:

a statement.

getRelationSymbol

public String getRelationSymbol()

Description copied from class: Statement

Returns the relation symbol of this statement.

Specified by:

getRelationSymbol in class Statement

Returns:

the relation symbol of this statement.

isValid

public boolean isValid(Statement s)

Description copied from class: Statement

checks if a Statement fulfills the relation

Specified by:

isValid in class Statement

Parameters:

s - a Statement with values for all variables

Returns:

if the left and the right hand side are in the correct relation to each other