Class odf.ObjectNameGenerator

Helper object for generating unique object names. Each name is only reported once per instance, irrespective of whether it is actually then inserted into the dom tree in the odfContainer. There is expected to be a single instance of the object name generator created per session. This is necessary to close a potential race condition when generating unique names for operations. As there is no guarantee when a given op is executed, it is insufficient to simply rely on all previously generated names to be now present in the document definitions. To cope with this, the names generated by this instance are also cached for the lifetime of this object. Failure to do this could result in a situation like the following 1. SessionController generates new OpAddStyle & adds to session's queue 2. SessionController generates another OpAddStyle & adds to session's queue At step 2, as the session's queue implementation has no requirement that it immediately executes the operation from step 1, it is likely that the style created in step 1 is not yet present in the document DOM.