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https://issues.apache.org/jira/browse/CMIS-849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pascal Oblonczek updated CMIS-849:
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Summary: Rendition.GetContentstream always returns null for QueryResults
(was: Rendition.GetContentstream alway returns null for QueryResults)
> Rendition.GetContentstream always returns null for QueryResults
> ---------------------------------------------------------------
>
> Key: CMIS-849
> URL: https://issues.apache.org/jira/browse/CMIS-849
> Project: Chemistry
> Issue Type: Improvement
> Components: dotcmis
> Affects Versions: DotCMIS 0.6
> Environment: DotCMIS 0.6 on .NET 3.5 / Windows 7 x64
> Alfresco 5.0.a on Ubuntu 12.0.4 LTS
> Reporter: Pascal Oblonczek
> Priority: Minor
> Attachments: client-objects.diff
>
>
> How to reproduce:
> var ctx = session.CreateOperationContext();
> ctx.RenditionFilterString = "cmis:thumbnail";
> // Assumption: the returned document has a thumbnail rendition, edit query to
> match situation
> var result = session.Query("select * from cmis:document", false,
> ctx).getPage(1).FirstOrDefault();
> var contentStream = result.Renditions[0].GetContentStream()
> Expected: contentStream is an instance of a class that implements
> IContentStream
> Found: null
> ----
> Details:
> The implementation of DotCMIS.Client.Impl.QueryResult.QueryResult constructor
> creates all renditions with an id set to "null". This has probably been done
> because cmis:objectId might not have been selected by the query:
> [code file=client-object.cs:1581]
> Renditions.Add(of.ConvertRendition(null, rd));
> [/code]
> Looking at the implementation of
> DotCMIS.Client.Impl.Rendition.GetContentStream() we can see, that a null ID
> always leads to a null content stream. Thus, a query result will never by
> able to get the content stream of the rendition:
> [code file=client-object.cs:1513]
> public IContentStream GetContentStream()
> {
> if (objectId == null || StreamId == null)
> {
> return null;
> }
> [/code]
> Instead you will have to call session.getContentStream and select and input
> values appropriately by hand, which I find is not very comfortable.
> I attached a patch that makes this work. Anyway this means, that the "query
> author" needs to remember, that cmis:objectId must be selected by the query,
> otherwise he still gets null - maybe this is the main reason why you chose to
> always go with null.
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