THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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After we remove the alias field from ParamInfo, we can just replace Params with Map<ParamInfo<?>, Object>, which effectively contains the mapping from parameter definitions to parameter values.
6) The Param<?> class should implements the Serializable interface so that the Transformer/Estimator stages, whose instance could contain Param<?> instances, could be serialized and transferred between JobManager and TaskManagers.
Here are the usability issues with the existing APIs:
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/**
* Definition of a parameter, including name, class, description, default value and the validator.
*
* @param <T> The type of the parameter value
*/
public class Param<T> implements Serializable {
public final String name;
public final Class<?> clazz;
public final String description;
public final Object defaultValue;
public final ParamValidator validator;
public Param(String name, Class<?> clazz, String description, Object defaultValue, ParamValidator validator) {...}
// Encodes the given object into a json-formatted string
public String jsonEncode(Object value) throws IOException {...}
// Decodes the json-formatted string into an object of the given type.
public T jsonDecode(String json) throws IOException {...}
}
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