Check type of generic

Question

I have this method:

public <T> void onMultipleSelectionTextFinished(
          @NonNull ArrayList<FMultipleSelectionText.HolderItem<T>> holderItems, 
          int payload) {
    // check here
}

How can I check inside of it that holderItem is of type ArrayList<FMultipleSelectionText.HolderItem<EFunction>> and if it is then cast it to that and handle if in a special way ?

EDIT:

I tried using instanceof but it says this:

Also, I went by the rout of castig it to Object first and then castig it again to what I needed, but it's not an elegant solution :(

If you require type specific functionality, don't use generics — Tim, Jan 18 '17 at 09:51

score 1 · Accepted Answer · edited May 23 '17 at 12:24

1

You cannot do that at the compile time because of TypeErasure at runtime. Alternatively you can do this using reflection, Guava API also provide methods to accomplish this task. Please refer this link.

edited May 23 '17 at 12:24

Community

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answered Jan 18 '17 at 09:47

Rohit Gulati

542
3
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Hmm ... I'm complicating my existence with that. I'll just need to change the entire structure if that's the only way. It would be quicker to do that than use reflection :) – AndreiBogdan Jan 18 '17 at 09:49
You can give it a try. :) @AndreiBogdan – Rohit Gulati Jan 18 '17 at 09:51

Check type of generic

1 Answers1