[jira] [Created] (FLINK-12881) Add more functionalities for ML Params and ParamInfo class

[Shang Yuanchun (Jira)]

Xu Yang created FLINK-12881:
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             Summary: Add more functionalities for ML Params and ParamInfo class
                 Key: FLINK-12881
                 URL: https://issues.apache.org/jira/browse/FLINK-12881
             Project: Flink
          Issue Type: Sub-task
         Environment: * change Params$get to support aliases
  support aliases
  if the Params contains the specific parameter and alias, but has more than one value or
  if the Params doesn't contains the specific parameter, while the ParamInfo is optional but has no default value
  when isOptional is true, contain(ParamInfo) is true, it will return the value found in Params, whether the value is null or not. when isOptional is true, contain(ParamInfo) is false: hasDefaultValue is true, it will return defaultValue.  hasDefaultValue is false, it will throw exception. developer should use contain to check that Params has ParamInfo or not.
* add size, clear, isEmpty, contains, fromJson in Params
* fix ParamInfo, PipelineStage to adapt new Params
* add test cases about aliases
            Reporter: Xu Yang
            Assignee: Xu Yang


change Params$get to support aliases
add size, clear, isEmpty, contains, fromJson in Params
fix ParamInfo, PipelineStage to adapt new Params
add test cases about aliases



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