Package money

Class MoneyBag

java.lang.Object

money.Money

money.MoneyBag

public class MoneyBag
extends Money

A MoneyBag defers exchange rate conversions. For example adding 12 Swiss Francs to 14 US Dollars is represented as a bag containing the two Monies 12 CHF and 14 USD. Adding another 10 Swiss francs gives a bag with 22 CHF and 14 USD. Due to the deferred exchange rate conversion we can later value a MoneyBag with different exchange rates.

Author:

Kent Beck, Robert Duvall (small updates and commenting)

Constructor Summary

Constructors

Constructor	Description
MoneyBag()	Constructs an empty bag of money.
MoneyBag(MoneyBag copy)	Constructs a bag of money from the contents of the given bag of money.

Method Summary

Modifier and Type	Method	Description
Money	add(Money m)	Adds given money to this money.
boolean	equals(Object anObject)
int	hashCode()
boolean	isZero()	Tests whether this money is zero
Money	multiply(int factor)	Multiplies this money by the given factor.
Money	negate()	Negates this money.
static Money	of(SimpleMoney... monies)	Static "constructor" that creates appropriate concrete class based on the given parameters
Money	subtract(Money m)	Subtracts given money from this money.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

MoneyBag

public MoneyBag()

Constructs an empty bag of money.

MoneyBag

public MoneyBag(MoneyBag copy)

Constructs a bag of money from the contents of the given bag of money.

Method Details

of

public static Money of(SimpleMoney... monies)

Static "constructor" that creates appropriate concrete class based on the given parameters

Parameters:

monies - any number of simple monies to combine

add

public Money add(Money m)

Description copied from class: Money

Adds given money to this money.

Specified by:

add in class Money

See Also:

• Forwards the request to addMoney helper, since we know what concrete type this instance is

subtract

public Money subtract(Money m)

Description copied from class: Money

Subtracts given money from this money.

Specified by:

subtract in class Money

See Also:

• Money.subtract(Money)

multiply

public Money multiply(int factor)

Description copied from class: Money

Multiplies this money by the given factor.

Specified by:

multiply in class Money

See Also:

• Money.multiply(int)

negate

public Money negate()

Description copied from class: Money

Negates this money.

Specified by:

negate in class Money

See Also:

• Money.negate()

isZero

public boolean isZero()

Description copied from class: Money

Tests whether this money is zero

Specified by:

isZero in class Money

See Also:

• Money.isZero()

equals

public boolean equals(Object anObject)

Overrides:

equals in class Object

See Also:

• Object.equals(Object)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

See Also:

• Object.hashCode()

toString

public String toString()

Overrides:

toString in class Object

See Also:

• Object.toString()