XProperty as Duration

[gbero]

Hi,

I'd like to parse a duration field i.e : "PT30M" stored in a XProperty but :

java.lang.ClassCastException: net.fortuna.ical4j.model.property.XProperty cannot be cast to net.fortuna.ical4j.model.property.Duration

which makes sense because they both extends from Property...

[benfortuna]

The solution is to write your own custom property class and inject it into the service loader via META-INF/services/net.fortuna.ical4j.model.PropertyFactory. For example:

https://github.com/ical4j/ical4j-extensions/blob/master/src/main/resources/META-INF/services/net.fortuna.ical4j.model.PropertyFactory

For your property implementation you could start by copying (or extending) the Duration class, and essentially just define a new factory implementation.

If the property is a "standard" custom property you could also consider forking the ical4j-extensions repository and create a pull request back to the main repo.

regards,
ben

[gbero]

Thanks for your answer!