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https://issues.apache.org/jira/browse/CALCITE-6552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-6552:
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Summary: Enable CheckerFramework in 'server' module (was: Enable
checkerframework in 'server' module)
> Enable CheckerFramework in 'server' module
> ------------------------------------------
>
> Key: CALCITE-6552
> URL: https://issues.apache.org/jira/browse/CALCITE-6552
> Project: Calcite
> Issue Type: Improvement
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
>
> In CALCITE-4199 we enabled CheckerFramework (via annotations and CI jobs) in
> the 'core' and 'linq4j' modules; this change further enables CheckerFramework
> in the 'server' module, and fixes all violations.
> There are also a large number of 'cosmetic' modifications to improve code
> quality without changing behavior, including:
> * Replace '{{this.x = x; assert x != null;}}' by '{{this.x =
> requireNonNull\(x);}}' in constructors
> * Replace {{assert}} in other code locations where it implements an
> invariant. We don't use {{requireNonNull}} because it throws
> {{NullPointerException}}; we would prefer to throw {{AssertionError}} or
> {{IllegalStateException}}
> * Replace {{x.equals("")}} and {{x.size() == 0}} with {{x.isEmpty()}}
> * Make fields {{final}} where possible
> * Make private methods and inner classes {{static}} where possible
> * In {{class Pair<K, V>}} make the type variables {{K}} and {{V}} no longer
> {{@Nullable}} by default (you can make each of them nullable if you need)
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