Using a POJO class wrapping an ArrayList

[Mengqi Yang]

Hi all,

Now I am building a POJO class for key selectors. Here is the class:

public class Ids<K> implements Comparable, Serializable{
        
        private static final long serialVersionUID = 1L;
        
        private ArrayList<K> ids = new ArrayList<K>();
        
        Ids() {}
        
        Ids(ArrayList<K> inputIds) {
                this.ids = inputIds;
        }
        
}

And the question is, how could I use each element in the array list as a
field for further key selection? I saw the typeinfo of Flink takes the field
of arraylist as 1. Or maybe I didn't understand it correctly.

Thanks,
Mengqi 



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