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
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			public boolean hasChildren(Object element) {
				return false;
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see
			 * org.eclipse.jface.viewers.ITreeContentProvider#getParent(java
			 * .lang.Object)
			 */
			public Object getParent(Object element) {
				return null;
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
			 */
			public void dispose() {
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see
			 * org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse
			 * .jface.viewers.Viewer, java.lang.Object, java.lang.Object)
			 */
			public void inputChanged(Viewer viewer, Object oldInput,
					Object newInput) {