Expression language agnostic way of accessing resource bundles

[erdincyilmazel]

For l10n and i18n there needs to be a way to access translation strings from properties files.

The bundled expression language provides a function called "text" to access resource bundles. You can say ${text('title')} to get the text labeled title. However this only works with the bundled EL but not with other alternatives like MVEL or Spring EL.

The ExpressionLanguage implementations should be able to provide custom ways to access resource bundles and there should be support in the template engine parser to access to resource bundles without too much typing.

New syntax could be:

<div>@{title}</div>
<div>@{hello, user}</div>

a file like messages.properties would look like:

title=This is the title
hell=Hello {0}