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This is a large-scale change and can be probably speeded up somehow. It will probably include association relinking in the Logical metamodel.
User adds classpath element: - use ClassPath API to obtain classpath components, - find if there is existing Codebase for classpath components: Found: put codebase to the classpath, run updator (issue #24805), not found: create codebase and start filling model (issue #20349). - relink associations in logical model. User removes classpath element: - remove classpath component, - relink associations in logical model, - if codebase is not used in any project, put it to the pool for removing (below) Codebases which are not used in any project: There should be a pool of unused codebases. We should provide an algorithm for removing "unused" items. These items have to be put to the pool first. The algorithm will decide, which items will be deleted permanently. The main reason for this solution is to prevent to permanently remove items, which are temporarily (for a short time) removed from the project classpath and then they are again added. The described solution can operate: 1. with project metamodel (if such a metamodel will be created, see issue #20346), or 2. directly with classpath API.
Correction - project metadata - issue #24799
Implementation of Java metamodel is now able to mount/unmount storage partitions when new filesystem (classpath item) is added/removed.