createVersion() in Alfresco

gnsv_ramana — Wed, 22 Dec 2010 06:31:47 GMT

Hi All, I'm facing problems in implementing versioning concept for the uploading content using java to alfresco. I came across some methods like createVersion(), deleteVersion() etc. I'm unable to find their usage. Can anyone help in illustrating the createVersion() to create versionable cont

Re: createVersion() in Alfresco

patil — Wed, 22 Dec 2010 06:57:11 GMT

Hi Ramana,

The below is the code for enabling the versioning of the document
FacesContext context = FacesContext.getCurrentInstance();
         RetryingTransactionHelper txnHelper = Repository.getRetryingTransactionHelper(context);
         RetryingTransactionCallback<Object> callback = new RetryingTransactionCallback<Object>()
         {
            public Object execute() throws Throwable
            {
               // add the versionable aspect to the node
               getNodeService().addAspect(getDocument().getNodeRef(), ContentModel.ASPECT_VERSIONABLE, null);
               return null;
            }
         };
         txnHelper.doInTransaction(callback);

This is the code for getting VersionHistory

/**
    * Returns a list of objects representing the versions of the
    * current document
    *
    * @return List of previous versions
    */
   public List getVersionHistory()
   {
      List<MapNode> versions = new ArrayList<MapNode>();

      if (getDocument().hasAspect(ContentModel.ASPECT_VERSIONABLE))
      {
         VersionHistory history = this.getVersionService().getVersionHistory(getDocument().getNodeRef());

         if (history != null)
         {
            for (Version version : history.getAllVersions())
            {
               // create a map node representation of the version
               MapNode clientVersion = new MapNode(version.getFrozenStateNodeRef());
               clientVersion.put("versionLabel", version.getVersionLabel());
               clientVersion.put("notes", version.getDescription());
               clientVersion.put("author", version.getCreator());
               clientVersion.put("versionDate", version.getCreatedDate());

               if(getDocument().hasAspect(ContentModel.ASPECT_MULTILINGUAL_EMPTY_TRANSLATION))
               {
                  clientVersion.put("url", null);
               }
               else
               {
                  clientVersion.put("url", DownloadContentServlet.generateBrowserURL(version.getFrozenStateNodeRef(),
                        clientVersion.getName()));
               }

               // add the client side version to the list
               versions.add(clientVersion);
            }
         }
      }

      return versions;
   }

You can get the VersionHistory from the ServiceRegistry.

Thanks,
Patil
Cignex Technologies
Bangalore

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createVersion() in Alfresco

Re: createVersion() in Alfresco