| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.commons.imaging.test.util; |
| |
| import java.io.File; |
| |
| import org.apache.commons.imaging.util.Debug; |
| |
| public class FileSystemTraversal |
| { |
| |
| public static final int MODE_FILES = 1; |
| public static final int MODE_FOLDERS = 2; |
| public static final int MODE_FILES_AND_FOLDERS = 3; |
| public static final int MODE_ALL = 4; |
| |
| public interface Visitor |
| { |
| public boolean visit(File file, double progressEstimate); |
| } |
| |
| public boolean traverseFiles(File file, Visitor visitor) |
| { |
| |
| return traverse(file, MODE_FILES, visitor); |
| } |
| |
| public boolean traverseFolders(File file, Visitor visitor) |
| { |
| |
| return traverse(file, MODE_FOLDERS, visitor); |
| } |
| |
| public boolean traverseAll(File file, Visitor visitor) |
| { |
| |
| return traverse(file, MODE_FILES_AND_FOLDERS, visitor); |
| } |
| |
| public boolean traverse(File file, int mode, Visitor visitor) |
| { |
| return traverse(file, mode, visitor, 0, 1); |
| } |
| |
| private boolean traverse(File file, int mode, Visitor visitor, |
| double estimate, double estimateIncrement) |
| { |
| |
| if (file.isFile()) |
| { |
| if ((mode == MODE_FILES) || (mode == MODE_FILES_AND_FOLDERS) |
| || (mode == MODE_ALL)) |
| { |
| if (!visitor.visit(file, estimate)) |
| return false; |
| } |
| } |
| else if (file.isDirectory()) |
| { |
| File files[] = file.listFiles(); |
| if (files != null) |
| { |
| for (int i = 0; i < files.length; i++) |
| { |
| File child = files[i]; |
| if (ON_MAC_OS_X && child.isDirectory()) |
| { |
| String name = child.getName(); |
| if (name.equalsIgnoreCase("automount") |
| || name.equalsIgnoreCase("private") |
| || name.equalsIgnoreCase("Network") |
| || name.equalsIgnoreCase("Volumes")) |
| { |
| continue; |
| // return true; |
| } |
| } |
| |
| if (!traverse(child, mode, visitor, estimate |
| + estimateIncrement * i / files.length, |
| estimateIncrement / files.length)) |
| return false; |
| } |
| } |
| |
| if ((mode == MODE_FOLDERS) || (mode == MODE_FILES_AND_FOLDERS) |
| || (mode == MODE_ALL)) |
| { |
| if (!visitor.visit(file, estimate)) |
| return false; |
| } |
| } |
| else |
| { |
| if (mode == MODE_ALL) |
| { |
| if (!visitor.visit(file, estimate)) |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| public boolean traverseFiles(Visitor visitor) |
| { |
| |
| return traverse(MODE_FILES, visitor); |
| } |
| |
| public boolean traverseFolders(Visitor visitor) |
| { |
| |
| return traverse(MODE_FOLDERS, visitor); |
| } |
| |
| public boolean traverseAll(Visitor visitor) |
| { |
| |
| return traverse(MODE_FILES_AND_FOLDERS, visitor); |
| } |
| |
| public boolean traverse(int mode, Visitor visitor) |
| { |
| return traverse(mode, visitor, 0, 1); |
| } |
| |
| private static boolean ON_MAC_OS_X; |
| |
| static |
| { |
| try |
| { |
| ON_MAC_OS_X = (System.getProperty("mrj.version") != null); |
| } |
| catch (Exception e) |
| { |
| Debug.debug(e); |
| |
| ON_MAC_OS_X = false; |
| } |
| } |
| |
| private boolean traverse(int mode, Visitor visitor, double estimate, |
| double estimateIncrement) |
| { |
| File roots[] = File.listRoots(); |
| |
| if (ON_MAC_OS_X) |
| { |
| File Volumes = new File("/Volumes/"); |
| roots = Volumes.listFiles(); |
| } |
| else |
| roots = File.listRoots(); |
| |
| if (roots == null) |
| return false; |
| |
| for (int i = 0; i < roots.length; i++) |
| { |
| File root = roots[i]; |
| |
| if (root == null || !root.exists()) |
| continue; |
| |
| if (!traverse(roots[i], mode, visitor, estimate + estimateIncrement |
| * i / roots.length, estimateIncrement / roots.length)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| } |