Package org.apfloat.calc

Class AbstractCalculatorImpl

java.lang.Object

org.apfloat.calc.AbstractCalculatorImpl

All Implemented Interfaces:

java.io.Serializable, CalculatorImpl

Direct Known Subclasses:

FunctionCalculatorImpl

public abstract class AbstractCalculatorImpl
extends java.lang.Object
implements CalculatorImpl, java.io.Serializable

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

Version:

1.14.0

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private java.lang.Long	inputPrecision
private boolean	pretty
private static long	serialVersionUID
private java.util.Map<java.lang.String,java.lang.Number>	variables

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractCalculatorImpl()	Default constructor.

Method Summary

Modifier and Type	Method	Description
java.lang.Number	add(java.lang.Number x, java.lang.Number y)	Addition.
java.lang.Number	divide(java.lang.Number x, java.lang.Number y)	Division.
java.lang.Number	doubleFactorial(java.lang.Number x)	Double factorial.
java.lang.Number	factorial(java.lang.Number x)	Factorial.
protected boolean	getFormat()	Get the formatting option.
protected java.lang.Long	getInputPrecision()	Get the input precision.
java.lang.Number	getVariable(java.lang.String name)	Get a variable.
java.lang.Number	mod(java.lang.Number x, java.lang.Number y)	Remainder.
java.lang.Number	multiply(java.lang.Number x, java.lang.Number y)	Multiplication.
java.lang.Number	negate(java.lang.Number x)	Negative value.
java.lang.Number	pow(java.lang.Number x, java.lang.Number y)	Power.
void	setFormat(boolean pretty)	Set the formatting option.
void	setInputPrecision(java.lang.Long inputPrecision)	Set a fixed input precision.
void	setVariable(java.lang.String name, java.lang.Number value)	Set a variable.
java.lang.Number	subtract(java.lang.Number x, java.lang.Number y)	Subtraction.
private static java.util.List<java.lang.Number>	toList(java.lang.Number x)
private static java.util.List<java.lang.Number>	toList(java.lang.Number x, java.lang.Number y)

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

variables

private java.util.Map<java.lang.String,java.lang.Number> variables

pretty

private boolean pretty

inputPrecision

private java.lang.Long inputPrecision

Constructor Detail

AbstractCalculatorImpl

protected AbstractCalculatorImpl()

Default constructor.

Method Detail

negate

public java.lang.Number negate(java.lang.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 java.lang.Number add(java.lang.Number x,
                            java.lang.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 java.lang.Number subtract(java.lang.Number x,
                                 java.lang.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 java.lang.Number multiply(java.lang.Number x,
                                 java.lang.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 java.lang.Number divide(java.lang.Number x,
                               java.lang.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 java.lang.Number mod(java.lang.Number x,
                            java.lang.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 java.lang.Number pow(java.lang.Number x,
                            java.lang.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.

factorial

public java.lang.Number factorial(java.lang.Number x)
                           throws ParseException

Description copied from interface: CalculatorImpl

Factorial.

Specified by:

factorial in interface CalculatorImpl

Parameters:

x - The argument.

Returns:

x!

Throws:

ParseException - In case of invalid arguments.

doubleFactorial

public java.lang.Number doubleFactorial(java.lang.Number x)
                                 throws ParseException

Description copied from interface: CalculatorImpl

Double factorial.

Specified by:

doubleFactorial in interface CalculatorImpl

Parameters:

x - The argument.

Returns:

x!!

Throws:

ParseException - In case of invalid arguments.

getVariable

public java.lang.Number getVariable(java.lang.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(java.lang.String name,
                        java.lang.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.

setInputPrecision

public void setInputPrecision(java.lang.Long inputPrecision)

Description copied from interface: CalculatorImpl

Set a fixed input precision.

Specified by:

setInputPrecision in interface CalculatorImpl

Parameters:

inputPrecision - The precision if a fixed precision is used or null for arbitrary precision.

getFormat

protected boolean getFormat()

Get the formatting option.

Returns:

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

getInputPrecision

protected java.lang.Long getInputPrecision()

Get the input precision.

Returns:

The input precision if a fixed precision is used or null for arbitrary precision.

toList

private static java.util.List<java.lang.Number> toList(java.lang.Number x)

toList

private static java.util.List<java.lang.Number> toList(java.lang.Number x,
                                                       java.lang.Number y)