if you really need this feature on your old version of Nuxeo, and if you have little development skills you can:

• create a nuxeo plugin with Nuxeo IDE, it's really easy.

• Create a new operation given a void as input and Document as output

• declare a variable that will receive the username

  @Param(name = "username", widget = Constants.W_TEXT)
  protected String username;
  

• And in your operation method, just get the userworkspace service

            UserWorkspaceService uws = Framework.getLocalService(UserWorkspaceService.class);
  

• I let you check how to get the workspace from it :)

Hope will help you

Other solution: you can use a “Run Script” operation before and produce your string using some MVEL expressions, mostly the String API (the same you have on java :http://docs.oracle.com/javase/6/docs/api/java/lang/String.html). You can use replace, match, …. and work on your string.

An exemple of script put in a Run Script (that doesn't do what you aim at though, just an exemple):

org.nuxeo.ecm.core.api.Blob myBlob=Document.getProperty(“file:content”); Context[“extension”]=“none”; Context[“filename”] = myBlob.getFilename(); String[] splitedFilename=Context[“filename”].split(“\.“); Context[“extension”]=“none”;if (splitedFilename.length>=2){Context[“extension”]=splitedFilename[splitedFilename.length-1]};

FYI in the next version ofNuxeo (5.4.3 or whatever it's named) a UserWorkspace.Get operation has been added that will help you once you upgrade (cf NXP-7638).