Initialize a composite component based on the provided attributes

Question

I\'m writing my custom table composite component with Mojarra JSF. I\'m also trying to bind that composite to a backing component. The aim is to be able to specify the numbe

Answer 1

A simpler solution would be to store and retrieve values as part of the components state. Storing can happen during encodeBegin, and retrieving could directly happen within the getter:

@FacesComponent("components.myTable")
public class TestTable extends UINamingContainer {
    public void action() {
        System.out.println("Called");
    }

    @Override
    public void encodeBegin(FacesContext context) throws IOException {
        // Initialize the list according to the element number
        List values = new ArrayList<>();
        Integer num = (Integer) getAttributes().get("itemNumber");
        for (int i = 0; i < num; i++) {
            values.add("item" + i);
        }
        getStateHelper().put("values",values);
        super.encodeBegin(context);
    }

    public List getValues() {
        return (List)getStateHelper().get("values");
    }
}

To avoid repeating the logic in getValues(), there could be additional parsing required in more complex cases, there should be a way to process and cache the attributes right after they become available, although I am not sure when and how at this point.

Either way - this seemed to be the simplest way to solve this problem.