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https://issues.apache.org/jira/browse/ARIES-1333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14622204#comment-14622204
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Guillaume Nodet commented on ARIES-1333:
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What could be done is avoid the creation of a copy if the collection is
actually compatible.
> Cannot instantiate singleton collections in blueprint
> -----------------------------------------------------
>
> Key: ARIES-1333
> URL: https://issues.apache.org/jira/browse/ARIES-1333
> Project: Aries
> Issue Type: Bug
> Components: Blueprint
> Affects Versions: blueprint-core-1.4.2
> Reporter: Tomas Rohovsky
> Attachments: bean-reference.zip
>
>
> New instances of collections (set, list, map) are always created when
> referring them by different beans. So, it behaves like the {{prototype}}
> scope would be set on them. The {{singleton}} scope should be default, but it
> doesn't work even if it is set explicitly. A Camel based reproducer is
> attached. Note that this is not an issue for Spring configuration.
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