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https://issues.apache.org/jira/browse/PHOENIX-5432?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christine Feng updated PHOENIX-5432:
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Attachment: PHOENIX-5432.master.v14.patch
> Refactor LiteralExpression to use the builder pattern
> -----------------------------------------------------
>
> Key: PHOENIX-5432
> URL: https://issues.apache.org/jira/browse/PHOENIX-5432
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 4.15.0, 5.1.0
> Reporter: Chinmay Kulkarni
> Assignee: Christine Feng
> Priority: Major
> Attachments: PHOENIX-5432-master-v1.patch,
> PHOENIX-5432.master.v10.patch, PHOENIX-5432.master.v11.patch,
> PHOENIX-5432.master.v12.patch, PHOENIX-5432.master.v13.patch,
> PHOENIX-5432.master.v14.patch, PHOENIX-5432.master.v2.patch,
> PHOENIX-5432.master.v3.patch, PHOENIX-5432.master.v4.patch,
> PHOENIX-5432.master.v5.patch, PHOENIX-5432.master.v6.patch,
> PHOENIX-5432.master.v7.patch, PHOENIX-5432.master.v8.patch,
> PHOENIX-5432.master.v9.patch, PHOENIX-5432.patch
>
> Time Spent: 6h 20m
> Remaining Estimate: 0h
>
> LiteralExpression is a mess. While it provides newConstant() APIs to build
> the object, it also provides two public constructors. There are 10 overloaded
> newConstant() methods and it is unclear which API to use in which case.
> This should be refactored to use the builder pattern and final member
> variables. Ideally, getters such as getMaxLength() should be simple member
> variable accessors and other ad-hoc logic surrounding those variables should
> be handled correctly when setting their respective values.
>
> Two solutions:
> # Consolidate the LiteralExpression newConstant() methods down into a single
> build() method
> ** Pros: easy to use since one build method can create all LiteralExpression
> objects
> ** Cons: requires adding 'throws SQLException' to a lot of method signatures
> where it wasn't necessary before, which can be confusing for future
> developers and potentially cause problems if a SQLException is actually
> thrown in some of these cases
> # Create two build() methods - one for LiteralExpressions that necessitate
> deriving value (which could throw SQLExceptions) and ones that don't
> ** Pros: don't need to change any existing method signatures
> ** Cons: requires future developers to know which of the two build methods
> to use
>
>
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