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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-673) Get rid of the NodeFactory
Date Fri, 28 Jun 2013 04:32:21 GMT

    [ https://issues.apache.org/jira/browse/DERBY-673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13695255#comment-13695255
] 

ASF subversion and git services commented on DERBY-673:
-------------------------------------------------------

Commit 1497644 from [~dagw]
[ https://svn.apache.org/r1497644 ]

DERBY-673: Get rid of the NodeFactory

Patch derby-673-typesafe-lists-2, which introduces generics to the
lists based on QueryTreeNodeVector. I also let the latter implement
the Iterable interface, which opens up for using Java 6 "foreach"
syntax in many cases. The patch makes use of this. Together, these
changes enables many casts to be eliminated and code clarification in
the compiler implementation.

It also removes most -Xlint warnings from impl/sql/compile classes, so
it should be ready to run with full lint.

Diffstat summary:
63 files changed, 854 insertions(+), 1236 deletions(-)
                
> 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
>            Assignee: Dag H. Wanvik
>              Labels: derby_triage10_11
>         Attachments: derby-673-1.diff.gz, derby-673-1.status, derby-673-2.diff.gz, derby-673-2.status,
derby-673-3.diff.gz, derby-673-3.status, derby-673-fixcomments.diff, derby-673-typesafe-lists-1.diff,
derby-673-typesafe-lists-1.status, derby-673-typesafe-lists-2.diff.gz, derby-673-typesafe-lists-2.status,
nodefactory-31.status, nodefactory-31.zip
>
>
> 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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