| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ccvs.core.client; |
| |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import org.eclipse.team.internal.ccvs.core.CVSException; |
| import org.eclipse.team.internal.ccvs.core.ICVSFile; |
| import org.eclipse.team.internal.ccvs.core.ICVSFolder; |
| import org.eclipse.team.internal.ccvs.core.ICVSResource; |
| import org.eclipse.team.internal.ccvs.core.ICVSResourceVisitor; |
| |
| /** |
| * Goes recursivly through the folders checks if they are empyty |
| * and deletes them. Of course it is starting at the leaves of the |
| * recusion (the folders that do not have subfolders). |
| */ |
| public class PruneFolderVisitor implements ICVSResourceVisitor { |
| |
| private ICVSFolder localRoot; |
| |
| public PruneFolderVisitor() { |
| } |
| |
| /** |
| * This method is used to visit a set of ICVSResources. |
| */ |
| public void visit(Session s, ICVSResource[] resources) throws CVSException { |
| visit(s.getLocalRoot(), resources); |
| } |
| |
| /** |
| * This method is used to visit a set of ICVSResources. |
| */ |
| public void visit(ICVSFolder root, ICVSResource[] resources) throws CVSException { |
| localRoot = root; |
| |
| // Visit the resources |
| Set prunableParents = new HashSet(); |
| for (int i = 0; i < resources.length; i++) { |
| ICVSResource cvsResource = resources[i]; |
| // prune the resource and it's children when appropriate |
| cvsResource.accept(this); |
| // if the resource doesn't exists, attempt to prune it's parent |
| if (!cvsResource.exists()) |
| prunableParents.add(cvsResource.getParent()); |
| } |
| for (Iterator iter = prunableParents.iterator(); iter.hasNext();) { |
| ICVSFolder cvsFolder = (ICVSFolder)iter.next(); |
| pruneFolderAndParentsIfAppropriate(cvsFolder); |
| } |
| } |
| /** |
| * @see ICVSResourceVisitor#visitFile(IManagedFile) |
| */ |
| public void visitFile(ICVSFile file) throws CVSException { |
| // nothing to do here |
| } |
| |
| /** |
| * @see ICVSResourceVisitor#visitFolder(ICVSFolder) |
| */ |
| public void visitFolder(ICVSFolder folder) throws CVSException { |
| // First prune any empty children |
| folder.acceptChildren(this); |
| // Then prune the folder if it is empty |
| pruneFolderIfAppropriate(folder); |
| } |
| |
| private void pruneFolderIfAppropriate(ICVSFolder folder) throws CVSException { |
| // Only prune managed folders that are not the root of the operation |
| if (folder.exists() && folder.isManaged() |
| && ! folder.equals(getLocalRoot()) |
| && folder.members(ICVSFolder.ALL_EXISTING_MEMBERS).length == 0) { |
| |
| // Delete the folder but keep a phantom for local folders |
| folder.delete(); |
| } |
| } |
| |
| private ICVSFolder getLocalRoot() { |
| return localRoot; |
| } |
| |
| /** |
| * Attemp to prunt the given folder. If the folder is pruned, attempt to prune it's parent. |
| */ |
| private void pruneFolderAndParentsIfAppropriate(ICVSFolder folder) throws CVSException { |
| pruneFolderIfAppropriate(folder); |
| if (!folder.exists()) { |
| ICVSFolder parent = folder.getParent(); |
| pruneFolderAndParentsIfAppropriate(parent); |
| } |
| } |
| } |