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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-673) Get rid of the NodeFactory
Date Fri, 24 May 2013 08:46:20 GMT

    [ https://issues.apache.org/jira/browse/DERBY-673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13666116#comment-13666116
] 

Knut Anders Hatlen commented on DERBY-673:
------------------------------------------

Strongly typed constructors or init() methods, with or without the NodeFactory, would be particularly
useful now that trunk can have Java 6 code with generics. If you try to pass a parameterized
type to one of the init() methods, like a List<String> instance, you'll have to do an
unchecked cast from Object to List<String> inside the init() method and the compiler
will produce a warning.
                
> Get rid of the NodeFactory
> --------------------------
>
>                 Key: DERBY-673
>                 URL: https://issues.apache.org/jira/browse/DERBY-673
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Rick Hillegas
>
> This piece of code once had a purpose in life. It was one of the double-joints which
allowed cloudscape to ship with and without compiler support for the synchronization language.
Synchronization has been removed. If we want to plug in optional language components, I think
there are better ways to do this.
> The NodeFactory turned into a big, sprawling piece of code. At some point this code was
slimmed down by telescoping all of its factory methods into a couple unwieldly, weakly-typed
overloads backed by cumbersome logic in the actual node constructors. I would like to reintroduce
strongly typed node constructors which the parser can call directly. This will make node generation
easier to read and less brittle and it will get rid of the now useless NodeFactory class.

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