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There is necessary to provide reading of older xml format and also its appropriate conversion to new config structures (see issue #32216)
Note: reaing of the oldest format (serialized one) whill be not supported. In that case, default configuration will be used.
Is there any spec how import of old configuration (projects) will be performed? We discussed what will be imported from older winsys configuration: To avoid breaking of new default layout we decided to load only editor components from old Editing workspace and put them to default place in new editor area. The problem with this approach is that I must instantiate all TopComponents from all modes in Editing workspace to find if it is editor or not. (Probably instanceof CloneableEditor.) Alternative is to check only TopComponents from mode "editor". Opinion from projects group: It has no sense to import anything at all because every source opened in editor must be member of some new existing project. However such dependency is undefined in case of import. Still it is possible to import something from point of view of winsys. The question is if it has any sense in context of IDE. Is there any usecase when we need to import old winsys configuration (or part of it) to new winsys? As mentioned above we will not support import of previous serialized winsys configuration.
Import of old configuration XML data is implemented in task #36138. *** This issue has been marked as a duplicate of 36138 ***