[jira] [Commented] (EASYANT-75) Class.getMethod / Class.invoke: compliance with J2SE 1.7

["Jean-Louis Boudart (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/EASYANT-75?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14904101#comment-14904101 ] 

Jean-Louis Boudart commented on EASYANT-75:
-------------------------------------------

Thx for the report and patch, i'll get a closer look on this at the end of the week.

> Class.getMethod / Class.invoke: compliance with J2SE 1.7
> --------------------------------------------------------
>
>                 Key: EASYANT-75
>                 URL: https://issues.apache.org/jira/browse/EASYANT-75
>             Project: EasyAnt
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.9, 0.10
>            Reporter: Adrien Quillet
>            Priority: Blocker
>              Labels: compliance
>         Attachments: ant-easyant-core-JIRA-75.patch
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> When running EasyAnt with J2SE 1.7, calling {{EasyAntEngine.guessEasyantCoreJarUrl()}} raises a {{NoSuchMethodException}}/{{IllegalArgumentException}}.
> *Code to fix:*
> {{EasyAntEngine.getLocalURL = conn.getClass().getMethod("getLocalURL", (Class<?>) null)}}
> {{URL localJarUrl = (URL) getLocalURL.invoke(conn, (Class<?>) null)}}
> *Fixed code:*
> {{EasyAntEngine.getLocalURL = conn.getClass().getMethod("getLocalURL", null)}}
> {{URL localJarUrl = (URL) getLocalURL.invoke(conn, null)}}
> *Reason:*
> From JES2 1.7 Javadoc, calling {{getMethod}} or {{invoke}} with no varArg or a {{null}} varArg is treated as if the method was called with an empty array (compliance with JES2 1.5).
> But calling those methods with a {{null}} varArg that is casted to {{Class<?>}} is treated as an array of {{Class<?>}} that contains one {{null}} element. So there is no matching method, hence the {{NoSuchMethodException}}/{{IllegalArgumentException}}. 
> _see also:_ http://stackoverflow.com/questions/5586862/weird-behaviour-of-getmethod-in-java-reflection-api-can-someone-explain-this



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