org.joda.money
Class CurrencyUnit

java.lang.Object
  org.joda.money.CurrencyUnit

All Implemented Interfaces:

Serializable, Comparable<CurrencyUnit>

public final class CurrencyUnit
extends Object
implements Comparable<CurrencyUnit>, Serializable

A unit of currency.

This class represents a unit of currency such as the British Pound, Euro or US Dollar.

The set of loaded currencies is provided by an instance of CurrencyUnitDataProvider. The provider used is determined by the system property org.joda.money.CurrencyUnitDataProvider which should be the fully qualified class name of the provider. The default provider loads the first resource named /org/joda/money/MoneyData.csv on the classpath.

This class is immutable and thread-safe.

See Also:

Serialized Form

Field Summary

static CurrencyUnit	AUD The currency 'AUD' - Australian Dollar.
static CurrencyUnit	CAD The currency 'CAD' - Canadian Dollar.
static CurrencyUnit	CHF The currency 'CHF' - Swiss Franc.
static CurrencyUnit	EUR The currency 'EUR' - Euro.
static CurrencyUnit	GBP The currency 'GBP' - British pound.
static CurrencyUnit	JPY The currency 'JPY' - Japanese Yen.
static CurrencyUnit	USD The currency 'USD' - United States Dollar.

Method Summary

int	compareTo(CurrencyUnit other) Compares this currency to another by alphabetical comparison of the code.
boolean	equals(Object obj) Checks if this currency equals another currency.
String	getCode() Gets the ISO-4217 three letter currency code.
Set<String>	getCountryCodes() Gets the country codes applicable to this currency.
String	getCurrencyCode() Gets the ISO-4217 three-letter currency code.
int	getDecimalPlaces() Gets the number of decimal places typically used by this currency.
int	getDefaultFractionDigits() Gets the number of fractional digits typically used by this currency.
static CurrencyUnit	getInstance(Locale locale) Obtains an instance of CurrencyUnit for the specified locale.
static CurrencyUnit	getInstance(String currencyCode) Obtains an instance of CurrencyUnit for the specified currency code.
String	getNumeric3Code() Gets the ISO-4217 numeric currency code as a three digit string.
int	getNumericCode() Gets the ISO-4217 numeric currency code.
String	getSymbol() Gets the symbol for this locale from the JDK.
String	getSymbol(Locale locale) Gets the symbol for this locale from the JDK.
int	hashCode() Returns a suitable hash code for the currency.
boolean	isPseudoCurrency() Checks if this is a pseudo-currency.
static CurrencyUnit	of(Currency currency) Obtains an instance of CurrencyUnit matching the specified JDK currency.
static CurrencyUnit	of(Locale locale) Obtains an instance of CurrencyUnit for the specified locale.
static CurrencyUnit	of(String currencyCode) Obtains an instance of CurrencyUnit for the specified ISO-4217 three letter currency code.
static CurrencyUnit	ofCountry(String countryCode) Obtains an instance of CurrencyUnit for the specified ISO-3166 country code.
static CurrencyUnit	ofNumericCode(int numericCurrencyCode) Obtains an instance of CurrencyUnit for the specified ISO-4217 numeric currency code.
static CurrencyUnit	ofNumericCode(String numericCurrencyCode) Obtains an instance of CurrencyUnit for the specified ISO-4217 numeric currency code.
static CurrencyUnit	registerCurrency(String currencyCode, int numericCurrencyCode, int decimalPlaces, List<String> countryCodes) Registers a currency allowing it to be used.
static CurrencyUnit	registerCurrency(String currencyCode, int numericCurrencyCode, int decimalPlaces, List<String> countryCodes, boolean force) Registers a currency allowing it to be used, allowing replacement.
static List<CurrencyUnit>	registeredCurrencies() Gets the list of all registered currencies.
Currency	toCurrency() Gets the JDK currency instance equivalent to this currency.
String	toString() Gets the currency code as a string.

Methods inherited from class java.lang.Object

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

Field Detail

USD

public static final CurrencyUnit USD

The currency 'USD' - United States Dollar.

EUR

public static final CurrencyUnit EUR

The currency 'EUR' - Euro.

JPY

public static final CurrencyUnit JPY

The currency 'JPY' - Japanese Yen.

GBP

public static final CurrencyUnit GBP

The currency 'GBP' - British pound.

CHF

public static final CurrencyUnit CHF

The currency 'CHF' - Swiss Franc.

AUD

public static final CurrencyUnit AUD

The currency 'AUD' - Australian Dollar.

CAD

public static final CurrencyUnit CAD

The currency 'CAD' - Canadian Dollar.

Method Detail

registerCurrency

public static CurrencyUnit registerCurrency(String currencyCode,
                                            int numericCurrencyCode,
                                            int decimalPlaces,
                                            List<String> countryCodes)

Registers a currency allowing it to be used.

This class only permits known currencies to be returned. To achieve this, all currencies have to be registered in advance.

Since this method is public, it is possible to add currencies in application code. It is recommended to do this only at startup, however it is safe to do so later as the internal implementation is thread-safe.

Parameters:

currencyCode - the currency code, not null

numericCurrencyCode - the numeric currency code, -1 if none

decimalPlaces - the number of decimal places that the currency normally has, from 0 to 9 (normally 0, 2 or 3), or -1 for a pseudo-currency

countryCodes - the country codes to register the currency under, not null

Returns:

the new instance, never null

Throws:

IllegalArgumentException - if the code is already registered, or the specified data is invalid

registerCurrency

public static CurrencyUnit registerCurrency(String currencyCode,
                                            int numericCurrencyCode,
                                            int decimalPlaces,
                                            List<String> countryCodes,
                                            boolean force)

Registers a currency allowing it to be used, allowing replacement.

This class only permits known currencies to be returned. To achieve this, all currencies have to be registered in advance.

Since this method is public, it is possible to add currencies in application code. It is recommended to do this only at startup, however it is safe to do so later as the internal implementation is thread-safe.

This method uses a flag to determine whether the registered currency must be new, or can replace an existing currency.

Parameters:

currencyCode - the currency code, not null

numericCurrencyCode - the numeric currency code, -1 if none

decimalPlaces - the number of decimal places that the currency normally has, from 0 to 9 (normally 0, 2 or 3), or -1 for a pseudo-currency

countryCodes - the country codes to register the currency under, use of ISO-3166 is recommended, not null

force - true to register forcefully, replacing any existing matching currency, false to validate that there is no existing matching currency

Returns:

the new instance, never null

Throws:

IllegalArgumentException - if the code is already registered and force is false; or if the specified data is invalid

registeredCurrencies

public static List<CurrencyUnit> registeredCurrencies()

Gets the list of all registered currencies.

This class only permits known currencies to be returned, thus this list is the complete list of valid singleton currencies. The list may change after application startup, however this isn't recommended.

Returns:

the sorted, independent, list of all registered currencies, never null

of

public static CurrencyUnit of(Currency currency)

Obtains an instance of CurrencyUnit matching the specified JDK currency.

This converts the JDK currency instance to a currency unit using the code.

Parameters:

currency - the currency, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

of

public static CurrencyUnit of(String currencyCode)

Obtains an instance of CurrencyUnit for the specified ISO-4217 three letter currency code.

A currency is uniquely identified by ISO-4217 three letter code.

Parameters:

currencyCode - the currency code, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

ofNumericCode

public static CurrencyUnit ofNumericCode(String numericCurrencyCode)

Obtains an instance of CurrencyUnit for the specified ISO-4217 numeric currency code.

The numeric code is an alternative to the three letter code. This method is lenient and does not require the string to be left padded with zeroes.

Parameters:

numericCurrencyCode - the currency code, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

ofNumericCode

public static CurrencyUnit ofNumericCode(int numericCurrencyCode)

Obtains an instance of CurrencyUnit for the specified ISO-4217 numeric currency code.

The numeric code is an alternative to the three letter code.

Parameters:

numericCurrencyCode - the numeric currency code, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

of

public static CurrencyUnit of(Locale locale)

Obtains an instance of CurrencyUnit for the specified locale.

Only the country is used from the locale.

Parameters:

locale - the locale, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

ofCountry

public static CurrencyUnit ofCountry(String countryCode)

Obtains an instance of CurrencyUnit for the specified ISO-3166 country code.

Country codes should generally be in upper case. This method is case sensitive.

Parameters:

countryCode - the country code, typically ISO-3166, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

getInstance

public static CurrencyUnit getInstance(String currencyCode)

Obtains an instance of CurrencyUnit for the specified currency code.

This method exists to match the API of Currency.

Parameters:

currencyCode - the currency code, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

getInstance

public static CurrencyUnit getInstance(Locale locale)

Obtains an instance of CurrencyUnit for the specified locale.

This method exists to match the API of Currency.

Parameters:

locale - the locale, not null

Returns:

the singleton instance, never null

Throws:

IllegalCurrencyException - if the currency is unknown

getCode

public String getCode()

Gets the ISO-4217 three letter currency code.

Each currency is uniquely identified by a three-letter code.

Returns:

the three letter ISO-4217 currency code, never null

getNumericCode

public int getNumericCode()

Gets the ISO-4217 numeric currency code.

The numeric code is an alternative to the standard three letter code.

Returns:

the numeric currency code

getNumeric3Code

public String getNumeric3Code()

Gets the ISO-4217 numeric currency code as a three digit string.

This formats the numeric code as a three digit string prefixed by zeroes if necessary. If there is no valid code, then an empty string is returned.

Returns:

the three digit numeric currency code, empty is no code, never null

getCountryCodes

public Set<String> getCountryCodes()

Gets the country codes applicable to this currency.

A currency is typically valid in one or more countries. The codes are typically defined by ISO-3166. An empty set indicates that no the currency is not associated with a country code.

Returns:

the country codes, may be empty, not null

getDecimalPlaces

public int getDecimalPlaces()

Gets the number of decimal places typically used by this currency.

Different currencies have different numbers of decimal places by default. For example, 'GBP' has 2 decimal places, but 'JPY' has zero. Pseudo-currencies will return zero.

See also getDefaultFractionDigits().

Returns:

the decimal places, from 0 to 9 (normally 0, 2 or 3)

isPseudoCurrency

public boolean isPseudoCurrency()

Checks if this is a pseudo-currency.

Returns:

true if this is a pseudo-currency

getCurrencyCode

public String getCurrencyCode()

Gets the ISO-4217 three-letter currency code.

This method matches the API of Currency.

Returns:

the currency code, never null

getDefaultFractionDigits

public int getDefaultFractionDigits()

Gets the number of fractional digits typically used by this currency.

Different currencies have different numbers of fractional digits by default. For example, 'GBP' has 2 fractional digits, but 'JPY' has zero. Pseudo-currencies are indicated by -1.

This method matches the API of Currency. The alternative method getDecimalPlaces() may be more useful.

Returns:

the fractional digits, from 0 to 9 (normally 0, 2 or 3), or -1 for pseudo-currencies

getSymbol

public String getSymbol()

Gets the symbol for this locale from the JDK.

If this currency doesn't have a JDK equivalent, then the currency code is returned.

This method matches the API of Currency.

Returns:

the JDK currency instance, never null

getSymbol

public String getSymbol(Locale locale)

Gets the symbol for this locale from the JDK.

If this currency doesn't have a JDK equivalent, then the currency code is returned.

This method matches the API of Currency.

Parameters:

locale - the locale to get the symbol for, not null

Returns:

the JDK currency instance, never null

toCurrency

public Currency toCurrency()

Gets the JDK currency instance equivalent to this currency.

This attempts to convert a CurrencyUnit to a JDK Currency.

Returns:

the JDK currency instance, never null

Throws:

IllegalArgumentException - if no matching currency exists in the JDK

compareTo

public int compareTo(CurrencyUnit other)

Compares this currency to another by alphabetical comparison of the code.

Specified by:

compareTo in interface Comparable<CurrencyUnit>

Parameters:

other - the other currency, not null

Returns:

negative if earlier alphabetically, 0 if equal, positive if greater alphabetically

equals

public boolean equals(Object obj)

Checks if this currency equals another currency.

The comparison checks the 3 letter currency code.

Overrides:

equals in class Object

Parameters:

obj - the other currency, null returns false

Returns:

true if equal

hashCode

public int hashCode()

Returns a suitable hash code for the currency.

Overrides:

hashCode in class Object

Returns:

the hash code

toString

public String toString()

Gets the currency code as a string.

Overrides:

toString in class Object

Returns:

the currency code, never null