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ICU Support Plugin

  • Tags: i18n, formatting, icu
  • Latest: 0.1.1
  • Last Updated: 09 April 2015
  • Grails version: 2.4 > *
1 vote
compile "org.grails.plugins:icu:0.1.1"

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Provides the ICU4J message formatting features, such as named arguments support, flexible plural formatting, rule based number format, date interval formats, etc.


Add the following plugin definition to your BuildConfig:
compile ':icu:0.1.1'
Now you can use all Grails i18n stuff (<g:message> tag, files) as usual, the plugin extends message formatting abilities.



Named arguments

By default Grails allows to use only numbered arguments in i18n messages. The plugin allows to use also named arguments, which sometimes are more readable. For example:
numbered={0}, you have {1} unread messages of {2}
names={username}, you have {unread} unread messages of {total}
With the plugin, latter message can be used:
<g:message code="names" args="[username: 'John', unread: 12, total: 200]"/>
will output "John, you have 12 unread messages of 200".

Plural formatting

Pluralisation in English is pretty simple and can be implemented using embedded "ChoiceFormat". However, many other languages have more complex pluralisation rules described here, which cannot be handled by default. The plugin provides a simple pluralization using a language's rules, e.g. for Polish:
plural={0} {0, plural, one{auto}few{auta}many{aut}other{aut}}
<g:message code="plural" args="[3]"/>, <g:message code="plural" args="[7]"/>
will output "3 auta, 7 aut".

Rule based number formatting

amount={0, spellout} dollars
<g:message code="amount" args="[12045]"/>
will output "twelve thousand forty-five dollars".

Other features

  • ICU implements a more user-friendly apostrophe quoting syntax. In message text, an apostrophe only begins quoting
literal text if it immediately precedes a syntax character (mostly {curly braces}). By default an apostrophe always begins quoting, which requires common text like "don't" and "aujourd'hui" to be written with doubled apostrophes like "don''t" and "aujourd''hui".
  • Many more date formats: month+day, year+month,...
  • Date interval formats: "Dec 15-17, 2009"