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I hope you are not confusing between the data in the table and it's value. Table's value, which you can bind, is its selection, not the (container) data displayed in the table. The value is an item ID Object in single-select mode and a Set<Object> in multi-select mode.
If you want to directly bind Table's container data to a bean property, you'd perhaps need to extend it and redefine what its value means.