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
public void widgetSelected(SelectionEvent e) {
				copyFiles = copyCheckbox.getSelection();
			}
		});
	}
	/**
	 * Create the checkbox list for the found projects.
	 * 
	 * @param workArea
	 */
	private void createProjectsList(Composite workArea) {
		Label title = new Label(workArea, SWT.NONE);
		title
				.setText(DataTransferMessages.WizardProjectsImportPage_ProjectsListTitle);
		Composite listComposite = new Composite(workArea, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginWidth = 0;
		layout.makeColumnsEqualWidth = false;
		listComposite.setLayout(layout);
		listComposite.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL
				| GridData.GRAB_VERTICAL | GridData.FILL_BOTH));
		projectsList = new CheckboxTreeViewer(listComposite, SWT.BORDER);
		GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
		gridData.widthHint = new PixelConverter(projectsList.getControl()).convertWidthInCharsToPixels(25);
		gridData.heightHint = new PixelConverter(projectsList.getControl()).convertHeightInCharsToPixels(10);
		projectsList.getControl().setLayoutData(gridData);
		projectsList.setContentProvider(new ITreeContentProvider() {
			/*
			 * (non-Javadoc)