csheets.core.formula
Interface UnaryOperator

All Superinterfaces:

Operator, Serializable

All Known Implementing Classes:

Negator, Percent

public interface UnaryOperator
extends Operator

A unary operator in a formula.

Author:

Einar Pehrson

Method Summary

Value	applyTo(Expression operand) Applies the operator to the given operand and returns the result.
boolean	isPrefix() Returns whether the operator is a prefix operator, i.e. it appears before its operand.

Methods inherited from interface csheets.core.formula.Operator

getIdentifier, getOperandValueType

Method Detail

applyTo

Value applyTo(Expression operand)
              throws IllegalValueTypeException

Applies the operator to the given operand and returns the result.

Returns:

the result of the operation

Throws:

IllegalValueTypeException - if the value of the operand is not of the expected type

isPrefix

boolean isPrefix()

Returns whether the operator is a prefix operator, i.e. it appears before its operand.

Returns:

true for prefix operators, false for postfix operators