Bug 279781 [Import/Export] Recursive addition problem in Import > Existing projects into workspace
Build ID: M20090211-1700 Steps To Reproduce: 1. Create Workspace ws1 2. Create project p1. 3. Create Workspace ws1/p1 4. One Import > Existing projects into workspace 5. Select ws1/p1 and check the option "Copy projects into workspace". 6. Click finish button. 7. Observe that p1 is recursively added. More information: In ideal case we should check for recursive addition and avoid it.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardProjectsImportPage.java
* 
	 * @param files
	 * @param monitor
	 * 		The monitor to report to
	 * @return boolean <code>true</code> if the operation was completed.
	 */
	private boolean collectProjectFilesFromProvider(Collection files,
			Object entry, int level, IProgressMonitor monitor) {
		if (monitor.isCanceled()) {
			return false;
		}
		monitor.subTask(NLS.bind(
				DataTransferMessages.WizardProjectsImportPage_CheckingMessage,
				structureProvider.getLabel(entry)));
		List children = structureProvider.getChildren(entry);
		if (children == null) {
			children = new ArrayList(1);
		}
		Iterator childrenEnum = children.iterator();
		while (childrenEnum.hasNext()) {
			Object child = childrenEnum.next();
			if (structureProvider.isFolder(child)) {
				collectProjectFilesFromProvider(files, child, level + 1,
						monitor);
			}
			String elementLabel = structureProvider.getLabel(child);
			if (elementLabel.equals(IProjectDescription.DESCRIPTION_FILE_NAME)) {
				files.add(new ProjectRecord(child, entry, level));
			}
		}