resolver script checking no value of attribute; .length vs size()

[Les LaCroix]

David,

The code isn't quite the same as the working examples.  The broken one says
"...size != 0" but the working examples say "size() != 0" (method call).

-Les

<http://www.carleton.edu/>

*Les LaCroix '79*

Strategic Technologist

Information Technology Services

t: (507) 222-5455


On Mon, Apr 25, 2022 at 1:31 PM IAM David Bantz via users <
users at shibboleth.net> wrote:

> This little script (inside the EdReadyRole attribute definition) to add a
> default value if a dependent attribute did not assign value:
>
> if (typeof EdReadyEntitlement != “undefined” && EdReadyEntitlement != null && EdReadyEntitlement.getValues().size !=0)
>       {value = EdReadyEntitlement.getValues().get(0);
>       EdReadyRole.addValue(value);}
>     else
>      {EdReadyRole.addValue(“Student”);}
>
>
> triggers this error if the attribute EdReadyEntitlement is in fact empty:
>
> 'EdReadyRole':Script did not run successfully
>         at net.shibboleth.idp.attribute.resolver.ad.impl.ScriptedAttributeDefinition$AttributeDefinitionScriptEvaluator.execute(ScriptedAttributeDefinition.java:228)
> Caused by: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
>
>
> A colleague smartly told me to replace .size() with .length, which does in
> fact work without triggering the error. I do not really understand why,
> given the existence of > 20 other instances of precisely parallel tests of
> non-existence of dependent attribute in my resolver, accumulated over many
> years. e.g.,
>
> if (typeof uakStudentMAU != "undefined" && uakStudentMAU != null &&
> uakStudentMAU.getValues().*size()* != 0)
>
> if (typeof mauPrimaryAffiliation != "undefined" && mauPrimaryAffiliation
> != null && mauPrimaryAffiliation.getValues().*size()* != 0)
>
> …
>
>
> Should I replace all the .size() with .length condition?
>
>
> *Feel free to administer virtual dope slap if accompanied by good
> explanation!*
>
>
> David St Pierre Bantz
>
>
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