org.serversass.ast

Class Number

java.lang.Object

org.serversass.ast.Number

All Implemented Interfaces:

Expression

public class Number
extends Object
implements Expression

Represents a number, which might possibly also have a unit like "px" or "%".

Constructor Summary

Constructors

Constructor and Description
Number(double numericValue, String value, String unit) Creates a number with a known exact value, a string representation and a unit (might be "")
Number(String value) Creates a new number based on the givens string.

Method Summary

Modifier and Type	Method and Description
Expression	eval(Scope scope, Generator gen) If possible the expression is evaluated and a simplified expression is returned.
double	getNumericValue() The exact numeric value used to computations
String	getUnit() The unit of the number or "" if there is no unit.
String	getValue() Returns the string representation of the numeric value
boolean	isConstant() Determines if this expression is constant or if it depends on variables.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Number

public Number(double numericValue,
              String value,
              String unit)

Creates a number with a known exact value, a string representation and a unit (might be "")

Parameters:

numericValue - the numeric value used for calculations

value - the string representation of the value

unit - the unit of the value. Use "" not null for empty units.

Number

public Number(String value)

Creates a new number based on the givens string. The unit will be auto detected.

Parameters:

value - the string representation of the number (and its unit).

Method Detail

getValue

public String getValue()

Returns the string representation of the numeric value

Returns:

the string representation of the number without unit

getUnit

public String getUnit()

The unit of the number or "" if there is no unit.

Returns:

the unit of the number

getNumericValue

public double getNumericValue()

The exact numeric value used to computations

Returns:

the numeric value of this number

toString

public String toString()

Overrides:

toString in class Object

isConstant

public boolean isConstant()

Description copied from interface: Expression

Determines if this expression is constant or if it depends on variables.

Specified by:

isConstant in interface Expression

Returns:

true if the expression is constant, false otherwise

eval

public Expression eval(Scope scope,
                       Generator gen)

Description copied from interface: Expression

If possible the expression is evaluated and a simplified expression is returned.

Specified by:

eval in interface Expression

Parameters:

scope - the scope used to resolve variables.

gen - the generator used to evaluate functions

Returns:

a possibly simplified version of the expression