| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.openapi.vcs.update; |
| |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.io.File; |
| import java.util.*; |
| |
| /** |
| * author: lesya |
| */ |
| public class GroupByPackages { |
| private final Map<File, Collection<File>> myParentToChildrenMap = new HashMap<File, Collection<File>>(); |
| private final Collection<File> myRoots = new HashSet<File>(); |
| |
| public GroupByPackages(@NotNull Collection<File> files) { |
| for (File file : files) { |
| process(file); |
| } |
| splitRoots(); |
| } |
| |
| private void splitRoots() { |
| for (File oldRoot : new ArrayList<File>(myRoots)) { |
| File newRoot = splitRoot(oldRoot); |
| if (!oldRoot.equals(newRoot)) replaceRoot(oldRoot, newRoot); |
| } |
| } |
| |
| private void replaceRoot(File oldRoot, File newRoot) { |
| myRoots.remove(oldRoot); |
| myRoots.add(newRoot); |
| } |
| |
| private File splitRoot(@NotNull File oldRoot) { |
| List<File> children = getChildren(oldRoot); |
| if (children.size() == 1) { |
| return splitRoot(children.get(0)); |
| } |
| return oldRoot; |
| } |
| |
| private void process(@NotNull final File file) { |
| File f; |
| File parent = file.getParentFile(); |
| for (f = file; parent != null; f = parent, parent = parent.getParentFile()) { |
| Collection<File> files = myParentToChildrenMap.get(parent); |
| if (files == null) { |
| myParentToChildrenMap.put(parent, files = new HashSet<File>()); |
| } |
| files.add(f); |
| } |
| myRoots.add(f); |
| } |
| |
| @NotNull |
| public List<File> getRoots() { |
| return new ArrayList<File>(myRoots); |
| } |
| |
| @NotNull |
| public List<File> getChildren(File file) { |
| Collection<File> collection = myParentToChildrenMap.get(file); |
| if (collection == null) { |
| return ContainerUtil.emptyList(); |
| } |
| return new ArrayList<File>(collection); |
| } |
| } |