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https://issues.apache.org/jira/browse/GROOVY-7237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16387709#comment-16387709
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Paul King commented on GROOVY-7237:
-----------------------------------
I'd be inclined to provide a Closure to {{asImmutable()}} which dictated how to
make an element immutable, e.g.:
{code}
def mutable = [[1, 2], [3, 4]]
def immutable = mutable.asImmutable{ it instanceof List ? it.asImmutable() : it
}
assert immutable.getClass().name.contains('Unmodifiable')
assert immutable[0].getClass().name.contains('Unmodifiable')
{code}
It might support one or two arguments to provide a hook to the closure:
{code}
def immutable = mutable.asImmutable{ val, c -> val instanceof List ?
val.asImmutable(c) : val }
{code}
> Implement an alternative asImmutable which guards the elements of a
> collection as well
> --------------------------------------------------------------------------------------
>
> Key: GROOVY-7237
> URL: https://issues.apache.org/jira/browse/GROOVY-7237
> Project: Groovy
> Issue Type: New Feature
> Components: groovy-jdk
> Reporter: Leif Hanack
> Priority: Major
>
> The current implementation of {{asImmutable}} returns a simple
> {{Collections.unmodifiable...}}. This only guarantees that no element is
> added or removed. Nevertheless an element itself can be modified. What do you
> think about a feature enhancement of {{asImmutable}} where you can guard the
> elements of a collection as well? S.th. like {{asDeepImmutable}} could proxy
> the collection and guards all setter of all elements.
> What do you think about it?
> Regards, Leif
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