org.appng.api.support

Class I18n

java.lang.Object

org.appng.api.support.I18n

public class I18n
extends Object

Utility class used for formatting Strings, Dates and Numbers. Additionally, a message can be retrieved by delegating to RequestSupport.getMessage(String, Object...).
Since an instance of I18n is being added to each ExpressionEvaluator returned by Request.getExpressionEvaluator(), you can easily use the methods provided by I18n in your expressions.

Examples

Consider a ResourceBundle containing the following entries:

 dateFormat = yyyy-MM-dd
 today = Today: {0}
 

Reading the format for a FieldDef using message(String, Object...):

 <field name="validFrom" type="date" format="${i18n.message('dateFormat')}">
 

leads to

 <field name="validFrom" type="date" format="yyyy-MM-dd">
 

Setting the value for a Label using message(String, Object...) and formatDate(Date, String)

 <label>${i18n.message('today', i18n.formatDate(current.date, i18n.message('dateFormat')))}</label>
 

leads to (assuming current.today returns a Date):

 <label>Today: 2013-03-08</label>
 

Author:

Matthias Müller

Constructor Summary

Constructors

Constructor and Description
I18n(Request request) Creates a new I18n which uses the messages and the Locale provided by the given Request.

Method Summary

Modifier and Type	Method and Description
String	format(String format, Object... args) Formats the given String with the given arguments.
String	formatDate(Date date, String format) Formats the given Date using the given format.
String	formatNumber(Number number, String format) Formats the given Number using the given format.
String	message(String key) Returns an internationalized message by delegating to RequestSupport.getMessage(String, Object...).
String	message(String key, Object... args) Returns an internationalized message by delegating to RequestSupport.getMessage(String, Object...).

Methods inherited from class java.lang.Object

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

Constructor Detail

I18n

public I18n(Request request)

Creates a new I18n which uses the messages and the Locale provided by the given Request.

Parameters:

request - a Request

Method Detail

message

public String message(String key)

Returns an internationalized message by delegating to RequestSupport.getMessage(String, Object...). Applies the Locale provided by Request.getLocale().

Parameters:

key - the message key

Returns:

the message

See Also:

RequestSupport.getMessage(String, Object...)

message

public String message(String key,
                      Object... args)

Returns an internationalized message by delegating to RequestSupport.getMessage(String, Object...). Applies the Locale provided by Request.getLocale().

Parameters:

key - the message key

args - the message arguments

Returns:

the message

See Also:

RequestSupport.getMessage(String, Object...)

format

public String format(String format,
                     Object... args)

Formats the given String with the given arguments. Delegates to String.format(java.util.Locale, String, Object...) using the Locale provided by Request.getLocale().

Parameters:

format - the String to format

args - the arguments passed to

Returns:

a formatted String

See Also:

String.format(Locale, String, Object...)

formatDate

public String formatDate(Date date,
                         String format)

Formats the given Date using the given format. Internally, a SimpleDateFormat is being used. Applies the Locale provided by Request.getLocale().

Parameters:

date - the Date to format

format - the the format

Returns:

the formatted Number

See Also:

SimpleDateFormat(String, Locale), DateFormat.format(Date)

formatNumber

public String formatNumber(Number number,
                           String format)

Formats the given Number using the given format. Internally, a NumberFormat is being used, which applies the Locale provided by Request.getLocale().

Parameters:

number - the Number to format

format - the the format

Returns:

the formatted Number

See Also:

NumberFormat.getNumberInstance(Locale)