Hello I have created a small expression evaluator based on commons-el and wondered if you would be interested in it. It is not finished but the basic functionality is there.
The major feature of it is that it supports object conversion similar to what Daniel FagerstrÃm proposed some time ago: http://www.mail-archive.com/[email protected]/msg23888.html Objects retrieved will be converted to the requested object type. One can also supply a special type attribute that differentiates between converters of similar sort. For example with a configuration file like this: -------------------------- <?xml version="1.0"?> <root> <converter from="java.util.Date" to="java.lang.String" class="conversion.DefaultDateStringConverter"/> <converter from="java.util.Date" to="java.lang.String" type="full" class="conversion.DefaultDateStringConverter"/> </root> --------------------------- You can execute expressions like (if I have a date variable containing a Date, and locale=sv): ${date} -> "2004-nov-08" ${date#full} -> "den 8 november 2004" If you want to try it out it can be found at http://home.student.uu.se/j/joek8725/el.zip Installation instructions: * Unzip * apply TagTransformer.patch in $COCOON_HOME * cd el * ant build.webapp * ant test * ant deploy * point your servlet container to /path/to/el/webapp To make it usable in a webapp I created an extended version of the TagTransformer to support the expression evaluator. Currently expressions can only be used in text nodes as I haven't gotten around to doing it for attributes. Cheers Jonas
