Resource Deltas for External Folders
The resources plug-in broadcasts resource change events for files and folders in the workspace. This allows clients to react to changes that occur in those resources, and in the underlying file system. There is no way to receive resource change events for files and folders in the file system that do not belong to the workspace.
In the Java development tools, it would be useful to be able to add folders outside the workspace to a build path of a Java project.
Bug 77113 - Adding a directory-pointing variable to the project build path Bug 81402 - Allow external classfolders from a container Bug 109137 - Support compiling runtime workspace plugins against the launching workspace Bug 182537 - Enhance classpath container to support external class folders