[jira] [Resolved] (GROOVY-8547) Factory pattern side-stepped by CompilerConfiguration/ParserVersion

["Paul King (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-8547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul King resolved GROOVY-8547.
-------------------------------
       Resolution: Fixed
         Assignee: Paul King
    Fix Version/s: 3.0.0-beta-3

Proposed PR merged. Thanks!

> Factory pattern side-stepped by CompilerConfiguration/ParserVersion
> -------------------------------------------------------------------
>
>                 Key: GROOVY-8547
>                 URL: https://issues.apache.org/jira/browse/GROOVY-8547
>             Project: Groovy
>          Issue Type: Improvement
>          Components: parser
>            Reporter: Eric Milles
>            Assignee: Paul King
>            Priority: Minor
>             Fix For: 3.0.0-beta-3
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> It seems to me the selection of the Antlr2 or Antlr4 parser could be implemented within a default implementation of {{ParserPluginFactory}} instead of introducing {{ParserVersion}} with separate get/set on {{CompilerConfiguration}}. I don't see the need for static factory methods {{antlr2()}} and {{antlr4()}} on {{ParserPluginFactory}}, their use from {{CompilerConfiguration}} and the strange class loading in {{ParserPluginFactory}}.
> The factory pattern appears to me to be side-stepped in favor of a version constant. Is there still meaning in offering a config option of setting a {{ParserPluginFactory}}? Has this been used ever in the past?
> Couldn't this suffice for a default in {{CompilerConfiguration}}? Then {{ParserVersion}} could be dropped.
> {code:java}
>     public ParserPluginFactory getPluginFactory() {
>         if (pluginFactory == null) {
>             pluginFactory = new ParserPluginFactory() {
>                 @Override
>                 public ParserPlugin createParserPlugin() {
>                     return Boolean.getBoolean(GROOVY_ANTLR4_OPT) ? new Antlr4ParserPlugin() : new AntlrParserPlugin();
>                 }
>             }              
>         }
>         return pluginFactory;
>     }
> {code}



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