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https://issues.apache.org/jira/browse/VELOCITY-948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17417332#comment-17417332
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Claude Brisson commented on VELOCITY-948:
-----------------------------------------
We could add an immutable `IntegerRange.toList()` method for such use cases.
> Number ranges created as ASTIntegerRange$IntegerRange in 2.1 rather than
> java.util.ArrayList
> --------------------------------------------------------------------------------------------
>
> Key: VELOCITY-948
> URL: https://issues.apache.org/jira/browse/VELOCITY-948
> Project: Velocity
> Issue Type: Bug
> Components: Engine
> Affects Versions: 2.1
> Reporter: Tom White
> Priority: Minor
>
> Hello!
> I am having issues upgrading from 2.0 to 2.1 with existing templates. The
> minimal below example illustrates the change in behaviour:
> {code:java}
> <html>
> <body>
> #set ($example= [0..50])
> ${example.class.name}
> #set ($example[10] = 500)
> </body>
> </html>
> {code}
>
> With 2.0:
> this prints:
> <html><body>java.util.ArrayList</body></html>
> and throws no errors.
>
> With 2.1:
> this prints:
> <html><body>org.apache.velocity.runtime.parser.node.ASTIntegerRange$IntegerRange</body></html>
> and throws an UnsupportedMethodException at the set line.
>
> I have tried all kinds of config variables from the docs in a unit test.
> The 2.1 documentation states:
> * The VTL RangeOperator [ 1..10 ] and ObjectArray ["a","b"] are
> {{java.util.ArrayList}} objects when placed in the context or passed to
> methods. Therefore, your methods that are designed to accept arrays created
> in the template should be written with this in mind.
> [https://velocity.apache.org/engine/2.1/developer-guide.html]
>
>
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