com.mpobjects.bdparsii.eval

Interface Expression

All Known Implementing Classes:

AbstractExpression, BinaryOperation, Constant, FunctionCall, VariableReference

public interface Expression

Represents the result of a parsed expression.

Can be evaluated to return a BigDecimal value.

Method Summary

Modifier and Type	Method and Description
default BigDecimal	evaluate() Evaluates the expression to a BigDecimal number.
BigDecimal	evaluate(MathContext mathContext) Evaluates the expression to a BigDecimal number.
default MathContext	getMathContext() Can return the default math context to use during evaluation.
default boolean	isConstant() Determines the this expression is constant
default Expression	simplify(MathContext mathContext) Returns a simplified version of this expression.

Method Detail

evaluate

default BigDecimal evaluate()

Evaluates the expression to a BigDecimal number.

Returns:

the double value as a result of evaluating this expression.

evaluate

BigDecimal evaluate(MathContext mathContext)

Evaluates the expression to a BigDecimal number.

Parameters:

mathContext - Use this math context during calculation instead of the one provided during parsing. Does not affect already simplified subexpressions.

Returns:

the double value as a result of evaluating this expression.

simplify

default Expression simplify(MathContext mathContext)

Returns a simplified version of this expression.

Parameters:

mathContext - Match context used during simplification.

Returns:

a simplified version of this expression or this if the expression cannot be simplified

isConstant

default boolean isConstant()

Determines the this expression is constant

Returns:

true if the result of evaluate will never change and does not depend on external state like variables

getMathContext

default MathContext getMathContext()

Can return the default math context to use during evaluation.

Returns:

math context