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https://issues.apache.org/jira/browse/CALCITE-2259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16457321#comment-16457321
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Kevin Risden commented on CALCITE-2259:
---------------------------------------
Guava: Replace Preconditions.checkNotNull(obj); with
Objects.requireNonNull(obj);
> Allow Java 8 syntax in source files
> -----------------------------------
>
> Key: CALCITE-2259
> URL: https://issues.apache.org/jira/browse/CALCITE-2259
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
>
> Allow Java 8 syntax in source files.
> In core/pom.xml, I tried changing {{source=1.7 target=1.8}} to {{source=8
> target=8}} but I ran into [Janino issue
> 47|https://github.com/janino-compiler/janino/issues/47]. (Thanks,
> [~vvysotskyi], for logging that issue.)
> When this is fixed, we will be able to use lambdas ({{->}}).
>
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