atg.droplet
Class CurrencyConversionFormatter

java.lang.Object
  atg.nucleus.logging.VariableArgumentApplicationLoggingImpl
      atg.nucleus.GenericService
          atg.nucleus.TimedOperationService
              atg.nucleus.servlet.ServletService
                  atg.nucleus.servlet.HttpServletService
                      atg.servlet.DynamoServlet
                          atg.droplet.CurrencyFormatter
                              atg.droplet.CurrencyConversionFormatter

All Implemented Interfaces:

NameContextBindingListener, NameContextElement, NameResolver, AdminableService, ApplicationLogging, atg.nucleus.logging.ApplicationLoggingSender, atg.nucleus.logging.TraceApplicationLogging, atg.nucleus.logging.VariableArgumentApplicationLogging, ComponentNameResolver, Service, ServiceListener, ParameterServlet, java.util.EventListener, javax.servlet.Servlet

public class CurrencyConversionFormatter
extends CurrencyFormatter

This droplet can be used to convert and format a numeric amount, within a particular Locale, from a specific currency into a specific currency.

Example:

 <importbean bean="/atg/dynamo/droplet/CurrencyConversionFormatter">
 <droplet bean="CurrencyConversionFormatter">
   <param name="currency" value="param:amount">
   <param name="locale" value="en_US">
   <param name="targetLocale" value="bean:/OriginatingRequest.requestLocale.locale">
   <param name="euroSymbol" value="&euro">
   <oparam name="output">
     <valueof param="formattedCurrency" valueishtml>no price</valueof>
   </oparam>
 </droplet>
 

Usage:

currency

A number, expressed as either a java.lang.Number or String, which is the value to format

locale

The locale that "currency" is currently accurate for. For example, if sourceLocale is "en_US" then currency is expressed in US dollars. This value can be either a java.util.Locale object or a String which represents a locale. (e.g. en_US) If you want this to use Euro's, the variant of the locale must be EURO. This parameter is optional, if it is not provided then the default locale is assumed.

targetLocale

The locale which should be used to convert format the currency amount. This value can If you want this to use Euro's, the variant of the locale must be EURO. be either a java.util.Locale object or a String which represents a locale. (e.g. en_US)

euroSymbol

This optional parameter will be used if the target locale is using Euro's. If this is provided, it will be used as the symbol for Euros. This is useful because the commonly-used character set ISO Latin-1 (ISO 8859-1) does not include this character.

output

This parameter is serviced if the instance of this class is used as a droplet

formattedCurrency

Available from within the output parameter, this is the formatted currency

Field Summary

static java.lang.String	CLASS_VERSION Class version string
protected java.util.Map	mExchangeRates

Fields inherited from class atg.servlet.DynamoServlet

mAllowCleanupRequest, mParameters

Fields inherited from class atg.nucleus.servlet.ServletService

SERVLET_INFO_KEY

Fields inherited from class atg.nucleus.GenericService

SERVICE_INFO_KEY

Fields inherited from interface atg.nucleus.logging.TraceApplicationLogging

DEFAULT_LOG_TRACE_STATUS

Fields inherited from interface atg.nucleus.logging.ApplicationLogging

DEFAULT_LOG_DEBUG_STATUS, DEFAULT_LOG_ERROR_STATUS, DEFAULT_LOG_INFO_STATUS, DEFAULT_LOG_WARNING_STATUS

Constructor Summary

CurrencyConversionFormatter()
Constructs an instanceof CurrencyConversionFormatter

Method Summary

java.lang.Number	convertCurrency(java.lang.Number pOriginalValue, java.util.Locale pSourceLocale, java.util.Locale pTargetLocale) Convert an amount of money between the default currency and the currency of a specified locale Returns null if the locale does not have a configured exchange rate
protected java.lang.String	formatCurrency(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Return the currency formatted in the given Locale as a String.
protected java.util.Locale	getCurrencyTargetLocale(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Returns the locale associated with the request.
protected java.lang.String	getEuroSymbol(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Returns the symbol to use when formatting a price in Euros.
java.util.Map	getExchangeRates() Returns property exchangeRates, and, as a side-effect, initializes it if it has not already been initialized.
java.lang.String	getLookupKey(java.util.Locale pLocale) Obtain the string to use as a look-up key to determine the exchange rate.
protected java.lang.String	getYenSymbol(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Returns the symbol to use when formatting a price in Yen.
void	initializeConversionMap() Constructs a Map of locale names to currency exchange rates, based on the entries in a ResourceBundle
protected void	initializeIfNecessary() Do the initialization in initializeConversionMap on a just-in-time basis.
void	service(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Takes the formatted currency String and sets a request parameter named formattedCurrency, then services the output parameter.
void	setExchangeRates(java.util.Map pExchangeRates) Sets property exchangeRates

Methods inherited from class atg.droplet.CurrencyFormatter

getCurrency, getCurrencyLocale, getDefaultLocale, isUseRequestLocale, setDefaultLocale, setUseRequestLocale

Methods inherited from class atg.servlet.DynamoServlet

doDelete, doGet, doPost, doPut, getParameter, getParameters, getServletContext, service, service, setParameter

Methods inherited from class atg.nucleus.servlet.ServletService

destroy, getServletConfig, getServletInfo, init, setServletInfo

Methods inherited from class atg.nucleus.TimedOperationService

getAverageRequestHandlingTime, getHandledRequestCount, getRequestStartTime, getTotalRequestHandlingTime, isKeepingStatistics, notifyHandledRequest, resetStatistics, setKeepingStatistics

Methods inherited from class atg.nucleus.GenericService

addLogListener, createAdminServlet, doStartService, doStopService, getAbsoluteName, getAdminServlet, getLoggingForVlogging, getLogListenerCount, getLogListeners, getName, getNameContext, getNucleus, getRoot, getServiceConfiguration, getServiceInfo, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingTrace, isLoggingWarning, isRunning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logTrace, logTrace, logTrace, logWarning, logWarning, logWarning, nameContextElementBound, nameContextElementUnbound, removeLogListener, resolveName, resolveName, resolveName, resolveName, sendLogEvent, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingTrace, setLoggingWarning, setNucleus, setServiceInfo, startService, stopService

Methods inherited from class atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

vlogDebug, vlogDebug, vlogDebug, vlogDebug, vlogError, vlogError, vlogError, vlogError, vlogInfo, vlogInfo, vlogInfo, vlogInfo, vlogTrace, vlogTrace, vlogTrace, vlogTrace, vlogWarning, vlogWarning, vlogWarning, vlogWarning

Methods inherited from class java.lang.Object

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

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

mExchangeRates

protected java.util.Map mExchangeRates

Constructor Detail

CurrencyConversionFormatter

public CurrencyConversionFormatter()

Constructs an instanceof CurrencyConversionFormatter

Method Detail

setExchangeRates

public void setExchangeRates(java.util.Map pExchangeRates)

Sets property exchangeRates

The value of this property is a Map that has an entry for each supported currency conversion. The name for each entry is a 2-letter country code. The value for each entry is a double that indicates how many of the locale-specific currency are equivalent to one (1) unit of the default currency.

getExchangeRates

public java.util.Map getExchangeRates()

Returns property exchangeRates, and, as a side-effect, initializes it if it has not already been initialized.

See Also:

initializeIfNecessary

getCurrencyTargetLocale

protected java.util.Locale getCurrencyTargetLocale(DynamoHttpServletRequest pRequest,
                                                   DynamoHttpServletResponse pResponse)
                                            throws javax.servlet.ServletException,
                                                   java.io.IOException

Returns the locale associated with the request. The method first searches for a request paramater named sourceLocale. This value can be either a java.util.Locale object or a String which represents the locale. Next if the useRequestLocale property is true, then the locale of the request will be returned. Finally, if the locale cannot be determined, the the defaultLocale property is used.

Throws:

javax.servlet.ServletException

java.io.IOException

getEuroSymbol

protected java.lang.String getEuroSymbol(DynamoHttpServletRequest pRequest,
                                         DynamoHttpServletResponse pResponse)
                                  throws javax.servlet.ServletException,
                                         java.io.IOException

Returns the symbol to use when formatting a price in Euros. This is optional.

Overrides:

getEuroSymbol in class CurrencyFormatter

Throws:

javax.servlet.ServletException

java.io.IOException

getYenSymbol

protected java.lang.String getYenSymbol(DynamoHttpServletRequest pRequest,
                                        DynamoHttpServletResponse pResponse)
                                 throws javax.servlet.ServletException,
                                        java.io.IOException

Returns the symbol to use when formatting a price in Yen.

Throws:

javax.servlet.ServletException

java.io.IOException

formatCurrency

protected java.lang.String formatCurrency(DynamoHttpServletRequest pRequest,
                                          DynamoHttpServletResponse pResponse)
                                   throws javax.servlet.ServletException,
                                          java.io.IOException

Return the currency formatted in the given Locale as a String. The currency and locales are extracted from the request using the getCurrency(request, response) getCurrencyLocale(request, response) and getCurrencyTargetLocale(request, response) methods.

Overrides:

formatCurrency in class CurrencyFormatter

Throws:

javax.servlet.ServletException

java.io.IOException

initializeIfNecessary

protected void initializeIfNecessary()

Do the initialization in initializeConversionMap on a just-in-time basis. Formerly this was done in the constructor, causing a deferrable start-up cost for this class.

See Also:

initializeConversionMap, getExchangeRates

initializeConversionMap

public void initializeConversionMap()

Constructs a Map of locale names to currency exchange rates, based on the entries in a ResourceBundle

Throws:

ServiceException - if an entry could not be parsed as a Double

convertCurrency

public java.lang.Number convertCurrency(java.lang.Number pOriginalValue,
                                        java.util.Locale pSourceLocale,
                                        java.util.Locale pTargetLocale)

Convert an amount of money between the default currency and the currency of a specified locale
Returns null if the locale does not have a configured exchange rate

Parameters:

pOriginalValue - the amount of money to convert

pSourceLocale - the locale indicating the currency from which to convert

pTargetLocale - the locale indicating the currency to which to convert

getLookupKey

public java.lang.String getLookupKey(java.util.Locale pLocale)

Obtain the string to use as a look-up key to determine the exchange rate. The implementation here uses the locale's country name.

Parameters:

pLocale - the user's locale

service

public void service(DynamoHttpServletRequest pRequest,
                    DynamoHttpServletResponse pResponse)
             throws javax.servlet.ServletException,
                    java.io.IOException

Takes the formatted currency String and sets a request parameter named formattedCurrency, then services the output parameter.

Overrides:

service in class CurrencyFormatter

Parameters:

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

javax.servlet.ServletException - an application specific error occurred processing this request

java.io.IOException - an error occurred reading data from the request or writing data to the response.