/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.nutsnbolts.io;
import java.io.FileFilter;
import java.io.IOException;
import java.nio.file.DirectoryNotEmptyException;
import java.nio.file.DirectoryStream;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.StandardCopyOption;
import java.nio.file.attribute.BasicFileAttributes;
import org.smallmind.nutsnbolts.util.TimeArithmetic;
public class FileUtility {
public static boolean isDirectoryEmpty (Path directory) throws IOException {
DirectoryStream<Path> directoryStream = Files.newDirectoryStream(directory);
return !directoryStream.iterator().hasNext();
}
public static void copyTree (Path source, Path destination, FileManipulation... fileManipulations)
throws IOException {
copyTree(source, destination, null, fileManipulations);
}
public static void copyTree (final Path source, final Path destination, final FileFilter fileFilter, final FileManipulation... fileManipulations)
throws IOException {
if (Files.exists(source, LinkOption.NOFOLLOW_LINKS)) {
if (!Files.isDirectory(source, LinkOption.NOFOLLOW_LINKS)) {
if (!Files.exists(destination)) {
if (destination.getParent() != null) {
Files.createDirectories(destination.getParent());
}
Files.copy(source, destination, StandardCopyOption.COPY_ATTRIBUTES);
} else if (Files.isDirectory(destination)) {
Files.copy(source, destination.resolve(source.getFileName()), StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.COPY_ATTRIBUTES);
} else {
Files.copy(source, destination, StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.COPY_ATTRIBUTES);
}
} else {
Files.createDirectories(destination);
Files.walkFileTree(source, new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile (Path file, BasicFileAttributes attrs)
throws IOException {
Path destinationPath;
if ((fileFilter == null) || fileFilter.accept(file.toFile())) {
Files.copy(file, (destinationPath = destination.resolve(source.relativize(file))), StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.COPY_ATTRIBUTES);
if (fileManipulations != null) {
for (FileManipulation fileManipulation : fileManipulations) {
fileManipulation.manipulateFile(destinationPath);
}
}
}
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult preVisitDirectory (Path dir, BasicFileAttributes attrs) throws IOException {
Path destinationPath;
Files.createDirectories(destinationPath = destination.resolve(source.relativize(dir)));
if (fileManipulations != null) {
for (FileManipulation fileManipulation : fileManipulations) {
fileManipulation.manipulateDirectory(destinationPath);
}
}
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory (Path dir, IOException exc)
throws IOException {
if (exc != null) {
throw exc;
}
return FileVisitResult.CONTINUE;
}
});
}
}
}
public static void deleteTree (Path target)
throws IOException {
deleteTree(target, null, null, true);
}
public static void deleteTree (Path target, final FileFilter fileFilter)
throws IOException {
deleteTree(target, fileFilter, null, true);
}
public static void deleteTree (Path target, final TimeArithmetic timeArithmetic)
throws IOException {
deleteTree(target, null, timeArithmetic, true);
}
public static void deleteTree (Path target, final boolean throwErrorOnDirectoryNotEmpty)
throws IOException {
deleteTree(target, null, null, throwErrorOnDirectoryNotEmpty);
}
public static void deleteTree (Path target, final FileFilter fileFilter, final TimeArithmetic timeArithmetic)
throws IOException {
deleteTree(target, fileFilter, timeArithmetic, true);
}
public static void deleteTree (Path target, final FileFilter fileFilter, final boolean throwErrorOnDirectoryNotEmpty)
throws IOException {
deleteTree(target, fileFilter, null, throwErrorOnDirectoryNotEmpty);
}
public static void deleteTree (Path target, final TimeArithmetic timeArithmetic, final boolean throwErrorOnDirectoryNotEmpty)
throws IOException {
deleteTree(target, null, timeArithmetic, throwErrorOnDirectoryNotEmpty);
}
public static void deleteTree (Path target, final FileFilter fileFilter, final TimeArithmetic timeArithmetic, final boolean throwErrorOnDirectoryNotEmpty)
throws IOException {
if (Files.exists(target, LinkOption.NOFOLLOW_LINKS)) {
if (!Files.isDirectory(target, LinkOption.NOFOLLOW_LINKS)) {
Files.delete(target);
} else {
Files.walkFileTree(target, new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile (Path file, BasicFileAttributes attrs)
throws IOException {
if ((fileFilter == null) || fileFilter.accept(file.toFile())) {
if ((timeArithmetic == null) || timeArithmetic.accept(Files.getLastModifiedTime(file).toInstant())) {
Files.delete(file);
}
}
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory (Path dir, IOException exc)
throws IOException {
if (exc != null) {
throw exc;
}
try {
Files.delete(dir);
} catch (DirectoryNotEmptyException directoryNotEmptyException) {
if (throwErrorOnDirectoryNotEmpty) {
throw directoryNotEmptyException;
}
}
return FileVisitResult.CONTINUE;
}
});
}
}
}
}