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https://issues.apache.org/jira/browse/OLINGO-890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Frederik Zimmer updated OLINGO-890:
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Attachment: OLINGO890-expanding-to-a-contained-entity-set-result.patch
Attached a patch for alternative 2. The returned EntitySet can only be used to
read the entities. Other methods result in a UnsupportedOperationException
> Client-Proxy: expanding to a contained entity set results in an error
> ---------------------------------------------------------------------
>
> Key: OLINGO-890
> URL: https://issues.apache.org/jira/browse/OLINGO-890
> Project: Olingo
> Issue Type: Bug
> Components: odata4-ext
> Reporter: Frederik Zimmer
> Attachments:
> OLINGO890-expanding-to-a-contained-entity-set-result.patch
>
>
> Expanding a navigation property which navigates to a contained entity set
> results in an exception when accessing the navigation property.
> AbstractStructuredInvocationHandler assumes that when a ClientInlineEntitySet
> is retrieved from the server that the navigation property will return an
> EntityCollection, but for contained entity sets the navigation property will
> return an AbstractEntitySet.
> I see two possibilities:
> 1. The user has to create a second getter for the navigation property which
> returns an EntityCollection. The drawback is that the caller has to know how
> the entity was retrieved and then call the appropriate getter.
> 2. The returned AbstractEntitySet will contain the inline retrieved entities.
> Then there is the questions how some methods of AbstractEntitySet behave. At
> least some of the methods like count or execute should not make a server
> request but operate on the already retrieved collection
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