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
/**
	 * Answer a handle to the zip file currently specified as being the source.
	 * Return null if this file does not exist or is not of valid format.
	 */
	private ZipFile getSpecifiedZipSourceFile(String fileName) {
		if (fileName.length() == 0) {
			return null;
		}
		try {
			return new ZipFile(fileName);
		} catch (ZipException e) {
			displayErrorDialog(DataTransferMessages.ZipImport_badFormat);
		} catch (IOException e) {
			displayErrorDialog(DataTransferMessages.ZipImport_couldNotRead);
		}
		archivePathField.setFocus();
		return null;
	}
	/**
	 * Answer a handle to the zip file currently specified as being the source.
	 * Return null if this file does not exist or is not of valid format.
	 */
	private TarFile getSpecifiedTarSourceFile(String fileName) {
		if (fileName.length() == 0) {
			return null;
		}
		try {
			return new TarFile(fileName);
		} catch (TarException e) {
			displayErrorDialog(DataTransferMessages.TarImport_badFormat);