Bug 330553 [Import/Export] Importing a project that exists in workspace location merges the contents
(1) Create a project in the default location (2) Export it to an archive (3) Delete it (but don't choose the option to delete from disk) (4) Make some changes in the <workspace root>/<project> directory (4) Import the archive you exported in step 2 This results in files from both the archive and directory. If the directory already has a file thats available in the archive, then it doesn't modify it. Ideally we shouldn't be allowing the import at all.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardProjectsImportPage.java
private IProject[] wsProjects;
	
	private static final String[] FILE_IMPORT_MASK = {
			"*.jar;*.zip;*.tar;*.tar.gz;*.tgz", "*.*" }; 
	
	private String initialPath;
	
	
	private String lastPath;
	
	
	private long lastModified;
	private WorkingSetGroup workingSetGroup;
	private IStructuredSelection currentSelection;
	/**
	 * Creates a new project creation wizard page.
	 * 
	 */
	public WizardProjectsImportPage() {
		this("wizardExternalProjectsPage", null, null); 
	}
	/**
	 * Create a new instance of the receiver.
	 * 
	 * @param pageName
	 */
	public WizardProjectsImportPage(String pageName) {
		this(pageName,null, null);
	}