/*

* Copyright (c) [2016] [ <ether.camp> ]

* This file is part of the ethereumJ library.

*

* The ethereumJ library is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* The ethereumJ library 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 Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.

*/

package org.tron.utils;

import java.io.File;

import java.io.IOException;

import java.nio.file.FileVisitResult;

import java.nio.file.FileVisitor;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.attribute.BasicFileAttributes;

import java.util.ArrayList;

import java.util.List;

public class FileUtil {

public static List<String> recursiveList(String path) throws IOException {

final List<String> files = new ArrayList<>();

Files.walkFileTree(Paths.get(path), new FileVisitor<Path>() {

@Override

public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {

return FileVisitResult.CONTINUE;

}

@Override

public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {

files.add(file.toString());

return FileVisitResult.CONTINUE;

}

@Override

public FileVisitResult visitFileFailed(Path file, IOException exc) {

return FileVisitResult.CONTINUE;

}

@Override

public FileVisitResult postVisitDirectory(Path dir, IOException exc) {

return FileVisitResult.CONTINUE;

}

});

return files;

}

public static boolean recursiveDelete(String fileName) {

File file = new File(fileName);

if (file.exists()) {

//check if the file is a directory

if (file.isDirectory()) {

if ((file.list()).length > 0) {

for (String s : file.list()) {

//call deletion of file individually

recursiveDelete(fileName + System.getProperty("file.separator") + s);

}

}

}

file.setWritable(true);

boolean result = file.delete();

return result;

} else {

return false;

}

}

}