1 // ****************************************************************************** 2 // 3 // Title: Force Field X. 4 // Description: Force Field X - Software for Molecular Biophysics. 5 // Copyright: Copyright (c) Michael J. Schnieders 2001-2024. 6 // 7 // This file is part of Force Field X. 8 // 9 // Force Field X is free software; you can redistribute it and/or modify it 10 // under the terms of the GNU General Public License version 3 as published by 11 // the Free Software Foundation. 12 // 13 // Force Field X is distributed in the hope that it will be useful, but WITHOUT 14 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 // FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 // details. 17 // 18 // You should have received a copy of the GNU General Public License along with 19 // Force Field X; if not, write to the Free Software Foundation, Inc., 59 Temple 20 // Place, Suite 330, Boston, MA 02111-1307 USA 21 // 22 // Linking this library statically or dynamically with other modules is making a 23 // combined work based on this library. Thus, the terms and conditions of the 24 // GNU General Public License cover the whole combination. 25 // 26 // As a special exception, the copyright holders of this library give you 27 // permission to link this library with independent modules to produce an 28 // executable, regardless of the license terms of these independent modules, and 29 // to copy and distribute the resulting executable under terms of your choice, 30 // provided that you also meet, for each linked independent module, the terms 31 // and conditions of the license of that module. An independent module is a 32 // module which is not derived from or based on this library. If you modify this 33 // library, you may extend this exception to your version of the library, but 34 // you are not obligated to do so. If you do not wish to do so, delete this 35 // exception statement from your version. 36 // 37 // ****************************************************************************** 38 package ffx.utilities; 39 40 import static java.nio.file.Files.delete; 41 import static java.nio.file.Files.walkFileTree; 42 43 import java.io.IOException; 44 import java.nio.file.FileVisitResult; 45 import java.nio.file.Path; 46 import java.nio.file.SimpleFileVisitor; 47 import java.nio.file.attribute.BasicFileAttributes; 48 49 /** 50 * DirectoryUtils class. 51 * 52 * @author Michael J. Schnieders 53 * @since 1.0 54 */ 55 public class DirectoryUtils { 56 57 /** 58 * Private constructor to prevent instantiation. 59 */ 60 private DirectoryUtils() { 61 } 62 63 /** 64 * Recursively delete the contents of a directory. 65 * 66 * @param path a {@link java.nio.file.Path} object. 67 * @throws java.io.IOException Thrown if deletion fails. 68 */ 69 public static void deleteDirectoryTree(Path path) throws IOException { 70 walkFileTree( 71 path, 72 new SimpleFileVisitor<>() { 73 @Override 74 public FileVisitResult postVisitDirectory(Path dir, IOException e) throws IOException { 75 if (e == null) { 76 delete(dir); 77 return FileVisitResult.CONTINUE; 78 } else { 79 // directory iteration failed 80 throw e; 81 } 82 } 83 84 @Override 85 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) 86 throws IOException { 87 delete(file); 88 return FileVisitResult.CONTINUE; 89 } 90 }); 91 } 92 }