org.apfloat.calc

Class AbstractCalculatorImpl

java.lang.Object

org.apfloat.calc.AbstractCalculatorImpl

All Implemented Interfaces:

Serializable, CalculatorImpl

Direct Known Subclasses:

FunctionCalculatorImpl

public abstract class AbstractCalculatorImpl
extends Object
implements CalculatorImpl, Serializable

Basic calculator implementation. Provides a storage for variables, and maps the elementary operators to function calls.

Version:

1.6.3

Author:

Mikko Tommila

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractCalculatorImpl() Default constructor.

Method Summary

Modifier and Type	Method and Description
Number	add(Number x, Number y) Addition.
Number	divide(Number x, Number y) Division.
protected boolean	getFormat() Get the formatting option.
Number	getVariable(String name) Get a variable.
Number	mod(Number x, Number y) Remainder.
Number	multiply(Number x, Number y) Multiplication.
Number	negate(Number x) Negative value.
Number	pow(Number x, Number y) Power.
void	setFormat(boolean pretty) Set the formatting option.
void	setVariable(String name, Number value) Set a variable.
Number	subtract(Number x, Number y) Subtraction.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apfloat.calc.CalculatorImpl

format, function, parseDecimal, parseInteger

Constructor Detail

AbstractCalculatorImpl

protected AbstractCalculatorImpl()

Default constructor.

Method Detail

negate

public Number negate(Number x)
              throws ParseException

Description copied from interface: CalculatorImpl

Negative value.

Specified by:

negate in interface CalculatorImpl

Parameters:

x - The argument.

Returns:

-x

Throws:

ParseException - In case of invalid argument.

add

public Number add(Number x,
                  Number y)
           throws ParseException

Description copied from interface: CalculatorImpl

Addition.

Specified by:

add in interface CalculatorImpl

Parameters:

x - First argument.

y - Second argument.

Returns:

x + y

Throws:

ParseException - In case of invalid arguments.

subtract

public Number subtract(Number x,
                       Number y)
                throws ParseException

Description copied from interface: CalculatorImpl

Subtraction.

Specified by:

subtract in interface CalculatorImpl

Parameters:

x - First argument.

y - Second argument.

Returns:

x - y

Throws:

ParseException - In case of invalid arguments.

multiply

public Number multiply(Number x,
                       Number y)
                throws ParseException

Description copied from interface: CalculatorImpl

Multiplication.

Specified by:

multiply in interface CalculatorImpl

Parameters:

x - First argument.

y - Second argument.

Returns:

x * y

Throws:

ParseException - In case of invalid arguments.

divide

public Number divide(Number x,
                     Number y)
              throws ParseException

Description copied from interface: CalculatorImpl

Division.

Specified by:

divide in interface CalculatorImpl

Parameters:

x - First argument.

y - Second argument.

Returns:

x / y

Throws:

ParseException - In case of invalid arguments.

mod

public Number mod(Number x,
                  Number y)
           throws ParseException

Description copied from interface: CalculatorImpl

Remainder.

Specified by:

mod in interface CalculatorImpl

Parameters:

x - First argument.

y - Second argument.

Returns:

x % y

Throws:

ParseException - In case of invalid arguments.

pow

public Number pow(Number x,
                  Number y)
           throws ParseException

Description copied from interface: CalculatorImpl

Power.

Specified by:

pow in interface CalculatorImpl

Parameters:

x - First argument.

y - Second argument.

Returns:

xy

Throws:

ParseException - In case of invalid arguments.

getVariable

public Number getVariable(String name)
                   throws ParseException

Description copied from interface: CalculatorImpl

Get a variable.

Specified by:

getVariable in interface CalculatorImpl

Parameters:

name - Name of the variable.

Returns:

Value of the variable, or null if the variable is not defined.

Throws:

ParseException - In case of invalid argument.

setVariable

public void setVariable(String name,
                        Number value)

Description copied from interface: CalculatorImpl

Set a variable.

Specified by:

setVariable in interface CalculatorImpl

Parameters:

name - Name of the variable.

value - Value of the variable.

setFormat

public void setFormat(boolean pretty)

Description copied from interface: CalculatorImpl

Set the formatting option.

Specified by:

setFormat in interface CalculatorImpl

Parameters:

pretty - If a fixed-point or a floating-point notation should be used.

getFormat

protected boolean getFormat()

Get the formatting option.

Returns:

If a fixed-point or a floating-point notation should be used.