| /* |
| * Copyright 2000-2013 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.ide.todo; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.util.containers.HashMap; |
| |
| import java.util.*; |
| |
| /** |
| * @author Vladimir Kondratyev |
| */ |
| final class FileTree { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.ide.todo.FileTree"); |
| |
| private final Map<VirtualFile, List<VirtualFile>> myDirectory2Children; |
| private final Set<VirtualFile> myFiles; |
| private final Map<VirtualFile, List<VirtualFile>> myStrictDirectory2Children; |
| |
| FileTree() { |
| myDirectory2Children = new HashMap<VirtualFile, List<VirtualFile>>(); |
| myFiles = new HashSet<VirtualFile>(); |
| myStrictDirectory2Children = new HashMap<VirtualFile, List<VirtualFile>>(); |
| } |
| |
| void add(VirtualFile file) { |
| if (myFiles.contains(file)) { |
| return; |
| } |
| |
| VirtualFile dir = file.getParent(); |
| if (dir == null) { |
| LOG.error(file); |
| return; |
| } |
| |
| myFiles.add(file); |
| |
| List<VirtualFile> children = myStrictDirectory2Children.get(dir); |
| if (children != null) { |
| LOG.assertTrue(!children.contains(file)); |
| children.add(file); |
| } |
| else { |
| children = new ArrayList<VirtualFile>(2); |
| children.add(file); |
| myStrictDirectory2Children.put(dir, children); |
| } |
| |
| children = myDirectory2Children.get(dir); |
| if (children != null) { |
| LOG.assertTrue(!children.contains(file)); |
| children.add(file); |
| return; |
| } |
| else { |
| children = new ArrayList<VirtualFile>(2); |
| children.add(file); |
| myDirectory2Children.put(dir, children); |
| } |
| |
| VirtualFile parent = dir.getParent(); |
| while (parent != null) { |
| children = myDirectory2Children.get(parent); |
| if (children != null) { |
| if ((!children.contains(dir))) { |
| children.add(dir); |
| } |
| return; |
| } |
| else { |
| children = new ArrayList<VirtualFile>(2); |
| children.add(dir); |
| myDirectory2Children.put(parent, children); |
| } |
| dir = parent; |
| parent = parent.getParent(); |
| } |
| } |
| |
| boolean isDirectoryEmpty(VirtualFile dir) { |
| final List<VirtualFile> files = myStrictDirectory2Children.get(dir); |
| return files == null || files.isEmpty(); |
| } |
| |
| List<VirtualFile> getFilesUnderDirectory(VirtualFile dir) { |
| List<VirtualFile> filesList = new ArrayList<VirtualFile>(); |
| List<VirtualFile> files = myStrictDirectory2Children.get(dir); |
| if (files != null) { |
| filesList.addAll(files); |
| } |
| return filesList; |
| } |
| |
| void removeFile(VirtualFile file) { |
| if (!myFiles.contains(file)) { |
| return; |
| } |
| |
| myFiles.remove(file); |
| List<VirtualFile> dirsToBeRemoved = null; |
| for (VirtualFile _directory : myDirectory2Children.keySet()) { |
| List<VirtualFile> children = myDirectory2Children.get(_directory); |
| LOG.assertTrue(children != null); |
| if (children.contains(file)) { |
| children.remove(file); |
| if (children.size() == 0) { |
| if (dirsToBeRemoved == null) { |
| dirsToBeRemoved = new ArrayList<VirtualFile>(2); |
| } |
| dirsToBeRemoved.add(_directory); // we have to remove empty _directory |
| } |
| } |
| } |
| for (VirtualFile dir : myStrictDirectory2Children.keySet()) { |
| List<VirtualFile> children = myStrictDirectory2Children.get(dir); |
| LOG.assertTrue(children != null); |
| if (children.contains(file)) { |
| children.remove(file); |
| } |
| } |
| // We have remove also all removed (empty) directories |
| if (dirsToBeRemoved != null) { |
| LOG.assertTrue(dirsToBeRemoved.size() > 0); |
| for (VirtualFile dirToBeRemoved : dirsToBeRemoved) { |
| removeDir(dirToBeRemoved); |
| } |
| } |
| } |
| |
| /** |
| * The method removes specified <code>psiDirectory</code> from the tree. The directory should be empty, |
| * otherwise the method shows java.lang.IllegalArgumentException |
| */ |
| private void removeDir(VirtualFile psiDirectory) { |
| if (!myDirectory2Children.containsKey(psiDirectory)) { |
| throw new IllegalArgumentException("directory is not in the tree: " + psiDirectory); |
| } |
| List<VirtualFile> children = myDirectory2Children.remove(psiDirectory); |
| if (children == null) { |
| throw new IllegalArgumentException("directory has no children list: " + psiDirectory); |
| } |
| if (children.size() > 0) { |
| throw new IllegalArgumentException("directory isn't empty: " + psiDirectory); |
| } |
| // |
| myStrictDirectory2Children.remove(psiDirectory); |
| List<VirtualFile> dirsToBeRemoved = null; |
| for (VirtualFile _directory : myDirectory2Children.keySet()) { |
| children = myDirectory2Children.get(_directory); |
| LOG.assertTrue(children != null); |
| if (children.contains(psiDirectory)) { |
| children.remove(psiDirectory); |
| if (children.size() == 0) { |
| if (dirsToBeRemoved == null) { |
| dirsToBeRemoved = new ArrayList<VirtualFile>(2); |
| } |
| dirsToBeRemoved.add(_directory); // we have remove empty _directory |
| } |
| } |
| } |
| // |
| if (dirsToBeRemoved != null) { |
| for (VirtualFile dirToBeRemoved : dirsToBeRemoved) { |
| removeDir(dirToBeRemoved); |
| } |
| } |
| } |
| |
| boolean contains(VirtualFile file) { |
| return myFiles.contains(file); |
| } |
| |
| void clear() { |
| myStrictDirectory2Children.clear(); |
| myDirectory2Children.clear(); |
| myFiles.clear(); |
| } |
| |
| /** |
| * @return iterator of all files. |
| */ |
| Iterator<VirtualFile> getFileIterator() { |
| return myFiles.iterator(); |
| } |
| |
| /** |
| * @return all files (in depth) located under specified <code>psiDirectory</code>. |
| * Please note that returned files can be invalid. |
| */ |
| List<VirtualFile> getFiles(VirtualFile dir) { |
| List<VirtualFile> filesList = new ArrayList<VirtualFile>(); |
| collectFiles(dir, filesList); |
| return filesList; |
| } |
| |
| private void collectFiles(VirtualFile dir, List<VirtualFile> filesList) { |
| List<VirtualFile> children = myDirectory2Children.get(dir); |
| if (children != null) { |
| for (VirtualFile child : children) { |
| if (!child.isDirectory()) { |
| LOG.assertTrue(!filesList.contains(child)); |
| filesList.add(child); |
| } |
| else { |
| collectFiles(child, filesList); |
| } |
| } |
| } |
| } |
| } |