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https://issues.apache.org/jira/browse/KARAF-405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12984093#action_12984093
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Jean-Baptiste Onofré commented on KARAF-405:
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I guess that <compilerVersion>1.5</compilerVersion> on the
maven-compiler-version should do the work.
i'm gonna make some tries as I haven't yet fix the isEmpty() use :)
> Force JDK 1.5 compiler
> ----------------------
>
> Key: KARAF-405
> URL: https://issues.apache.org/jira/browse/KARAF-405
> Project: Karaf
> Issue Type: Improvement
> Reporter: Jean-Baptiste Onofré
> Fix For: 2.2.0
>
>
> As agreed on the dev mailing list, we defined the following policy:
> - Karaf 2.2.x == JDK 1.5
> - Karaf 3.0.x == JDK 1.6
> It means that we should be sure that we don't use JDK 1.6 specific methods on
> the current trunk (corresponding to Karaf 2.2.x).
> For instance, we got a Hudson build failure due to the usage of
> java.lang.String isEmpty() method which is JDK 1.6 specific whereas Hudson
> still uses JDK 1.5.
> To detect this kind of situation, I propose to define the <source/> and
> <target/> on the maven-compiler-plugin.
> These instructions will be removed after the 2.2.x branch cut off. The trunk
> will be Karaf 3.0.x and so JDK 1.6 compliant.
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