Ondra Žižka created FREEMARKER-73:
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Summary: ?seq to convert some models to a sequence
Key: FREEMARKER-73
URL: https://issues.apache.org/jira/browse/FREEMARKER-73
Project: Apache Freemarker
Issue Type: Bug
Components: engine
Affects Versions: 2.3.26-incubating
Reporter: Ondra Žižka
The objects I feed to FreeMarker often cotain {{Iterator}}s rather than
{{Collection}}s.
While it's quite easy to write a FreeMarker function
{{iteratorToList(Iterator)}}, it would be convenient to have the following:
A built-in that would convert various models to a sequence. Could be named
{{?seq}} or {{?sequence}}.
Usage:
{code}<#assign foo = myIterable?seq>{code}
{code}<#assign foo = myIterator?seq>{code}
* A sequence would stay intact.
* An {{Iterable}} wrapped in FM model would become internally a {{List}} - all
elements consumed and stored.
For me, other cases are not that important, but with some imagination, other
models could also leverage it, like,
* A {{Stream}} could be also turned into a {{List}}.
* A hash could turn into a sequence of key/value pairs. That could be useful
for debugging purposes.
I am not sure if I didn't propose that already, but I could only find
FREEMARKER-62.
Thanks for considering.
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