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https://issues.apache.org/jira/browse/TUSCANY-3629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12891157#action_12891157
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Mike Edwards commented on TUSCANY-3629:
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Possible values for the @source string value are:
a) $name
b) $name/expression
c) $name[xx]
d) $name[xx]/expression
c) and d) are clarifications.
The [xx] is typically meant to be used with a number e.g. [1]
- this means "choose the 1st value element of the multi-valued property"
...but the XPath meaning is more general and could be extended to
[...@foo="bar"]
- meaning "choose all value elements of the property which have @foo attribute
with the value "bar"
For any of a), b) c) and d), the expression COULD result in multiple values
being returned - all returned values should be placed into the property
containing the @source attribute - this may result in an error if the property
is actually single valued - but in that case, go fix the composite, since it is
clearly wrong.
> Tuscany does not handle cases where component <property> @source attribute
> references a multi-valued composite property
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: TUSCANY-3629
> URL: https://issues.apache.org/jira/browse/TUSCANY-3629
> Project: Tuscany
> Issue Type: Bug
> Components: Java SCA Assembly Model
> Affects Versions: Java-SCA-2.0-M5
> Reporter: Mike Edwards
> Fix For: Java-SCA-2.0
>
>
> Creation of OASIS SCA Assembly testcases ASM_5043 and ASM_5044 revealed some
> limitations in the Tuscany handling of <property> @source attributes which
> reference a <composite> <property> that is multi-valued.
> Basically there are 2 items:
> 1) The Tuscany code will only ever retrieve a single value even if both
> properties are multi-valued (this is simply a bug)
> 2) These testcases introduce some clarifications to the syntax for @source
> referencing sub-portions of a multi-valued property (this is an enchancement
> to what is in Tuscany now)
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