topic Re: How to get specific document version in Alfresco Archive

How to get specific document version

vipul_n — Thu, 29 May 2014 13:04:10 GMT

I am using CMIS Java API. My query is how to get document object id for the specific version. I want to use this specific document version id when I next time fetch that specific version using the following APIDocument doc = (Document) session.getObject(objectId);‍I know there is an API i.e. documen

Re: How to get specific document version

kaynezhang — Thu, 29 May 2014 15:09:47 GMT

You can use OperationContext to filter the amount of information returned and control paging.


      OperationContext context = new OperationContextImpl();
      context.setMaxItemsPerPage(10);
      context.set***(***);
      d.getAllVersions(context);
‍‍‍‍‍‍

Re: How to get specific document version

vipul_n — Fri, 30 May 2014 10:40:39 GMT

Thanks kaynezhang for your quick response.
When we used

 document.getAllVersions() ‍

and got the id of each version object, then we got id in format like <drupal5><docId>;<versionLabel></drupal5>
e.g. workspace://SpacesStore/344da22e-1252-48bc-b3ee-2844dcb8b2d4;1.1

is it a good practice if we append version label to document id and then call
<java>session.getObject("<documentId>;<versionLabelId>");</java>

Because we could not find any specific API to get specific version and could not find version specific document id, will this hardcoded format work forever?

Re: How to get specific document version

kaynezhang — Fri, 30 May 2014 12:42:48 GMT

The CMIS specification says
<strong>
Note: When a document is versioned, each version of the document is a separate document object. Thus, for document objects, an object ID actually identifies a specific version of a document."
</strong>
So the id

workspace://SpacesStore/344da22e-1252-48bc-b3ee-2844dcb8b2d4;1.1‍

will definately identify only one version node.
I think it is ok for you to use

 session.getObject("<documentId>;<versionLabelId>");‍

to get specific version now,but you should use it with precaution,since you might take beblow risks:
1.Now alfresco construct an version object id based on the nodeid and versionLabel,alfresco may change the id construction policy later.
2.You should use the default version label policy instead of creating a version label policy.

I suggest you separate your code and make it as exteandable as possible.

Re: How to get specific document version

vipul_n — Mon, 02 Jun 2014 05:52:00 GMT

kaynezhang,
Thank you very much for your valuable feedback.
This definitely clarifies my query.