org.matheclipse.core.reflection.system

Class Greater

java.lang.Object

org.matheclipse.core.eval.interfaces.AbstractFunctionEvaluator

org.matheclipse.core.reflection.system.Greater

All Implemented Interfaces:

IFunctionEvaluator, ITernaryComparator<IExpr>, IEvaluator

Direct Known Subclasses:

GreaterEqual, Less, LessEqual

public class Greater
extends AbstractFunctionEvaluator
implements ITernaryComparator<IExpr>

Nested Class Summary

Nested classes/interfaces inherited from interface org.matheclipse.core.generic.ITernaryComparator

ITernaryComparator.COMPARE_RESULT

Field Summary

Fields

Modifier and Type	Field and Description
static Greater	CONST

Constructor Summary

Constructors

Constructor and Description
Greater()

Method Summary

Modifier and Type	Method and Description
ITernaryComparator.COMPARE_RESULT	compare(IExpr a0, IExpr a1) Return TRUE if the comparison is true Return FALSE if the comparison is false Return UNDEFINED if the comparison is undetermined (i.e.
IExpr	evaluate(IAST ast) Symbolic evaluation of a function.
ITernaryComparator.COMPARE_RESULT	prepareCompare(IExpr o0, IExpr o1)
void	setUp(ISymbol symbol) Evaluate built-in rules and define Attributes for a function.

Methods inherited from class org.matheclipse.core.eval.interfaces.AbstractFunctionEvaluator

createRuleFromMethod, getPeriodicParts, getPureImaginaryPart, getRuleAST, isNegativeExpression, numericEval

Methods inherited from class java.lang.Object

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

Field Detail

CONST

public static final Greater CONST

Constructor Detail

Greater

public Greater()

Method Detail

evaluate

public IExpr evaluate(IAST ast)

Description copied from class: AbstractFunctionEvaluator

Symbolic evaluation of a function. ast.get(0) contains the head (i.e. the function symbol) of this abstract syntax tree (AST). ast.get(1) to ast.get(n) contains the first to n-th argument of the function.
If necessary use the methods from the Validate class to check the number or types of arguments in the evaluate method.
Note: if the symbolic evaluation isn't possible or no result is found the evaluate method returns with a null value without throwing an exception!

Specified by:

evaluate in interface IFunctionEvaluator

Specified by:

evaluate in class AbstractFunctionEvaluator

Parameters:

ast - the abstract syntax tree (AST) which should be evaluated

Returns:

the evaluated object or null, if evaluation isn't possible

See Also:

Validate

prepareCompare

public ITernaryComparator.COMPARE_RESULT prepareCompare(IExpr o0,
                                                        IExpr o1)

compare

public ITernaryComparator.COMPARE_RESULT compare(IExpr a0,
                                                 IExpr a1)

Description copied from interface: ITernaryComparator

• Return TRUE if the comparison is true
• Return FALSE if the comparison is false
• Return UNDEFINED if the comparison is undetermined (i.e. could not be evaluated)

Specified by:

compare in interface ITernaryComparator<IExpr>

Returns:

setUp

public void setUp(ISymbol symbol)

Description copied from class: AbstractFunctionEvaluator

Evaluate built-in rules and define Attributes for a function.

Specified by:

setUp in interface IEvaluator

Overrides:

setUp in class AbstractFunctionEvaluator

Parameters:

symbol - the symbol which should be set up