alibaba / alibaba/DataX

why not convert the member "String paras" to "Object paras"?

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Description

why not convert the member "string paras" of "com.alibaba.datax.core.transport.transformer.TransformerExecutionParas" class to "object paras",that will be helpful in using the "valueMapper". like this

![1540957469057](https://user-images.githubusercontent.com/16839929/47764887-5aedb100-dd02-11e8-82bd-0d6def96d02e.jpg)

![1540957312537](https://user-images.githubusercontent.com/16839929/47764848-01858200-dd02-11e8-96aa-7681ee5cf528.jpg)

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Research direction

Locate the com.alibaba.datax.core.transport.transformer.TransformerExecutionParas class and inspect the String paras member together with the valueMapper entry point. Trace how paras is parsed and consumed, then verify that object-valued parameters work without breaking existing string usage and add or update the relevant tests if they exist.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
data-engineering
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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