Dynamic data type for @Configured properties where value is provided by either InputColumn or some enumerable setting

[kaspersorensen]

For quite a lot of analyzers we could use a smarter way to configure in situations where input can either be provided in a fixed form (typically an enum) or be dynamic based on input column values.

For instance: Any aggregation could be based on record count (fixed "1" value) or based on some count in a column. To support both options, you would typically provide two @configured properties, leading to a confusion since the user has to decide on one rule using two separate properties.

A rough/initial proposal could be like this:

enum MyOption {
  RECORD_COUNT
}

@Configured
DynamicOption<MyOptions, Number> count;

...

MyOption countOption = count.getEnumValue()
InputColumn<Number> countInputColumn = count.getInputColumn();