net.minecrell.workbench.tools.FileTools.java Source code

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Here is the source code for net.minecrell.workbench.tools.FileTools.java

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/*
 * Copyright (c) 2015, Minecrell <https://github.com/Minecrell>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package net.minecrell.workbench.tools;

import com.google.common.collect.ImmutableSet;

import java.io.BufferedReader;
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.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;

public class FileTools {

    private FileTools() {
    }

    private static final FileVisitor<Path> DELETE_VISITOR = new SimpleFileVisitor<Path>() {

        @Override
        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
            Files.delete(file);
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
            Files.delete(dir);
            return FileVisitResult.CONTINUE;
        }

    };

    public static boolean delete(Path path) throws IOException {
        if (Files.isDirectory(path)) {
            Files.walkFileTree(path, DELETE_VISITOR);
            return true;
        } else {
            return Files.deleteIfExists(path);
        }
    }

    public static ImmutableSet<String> readAllLines(Path path) throws IOException {
        try (BufferedReader reader = Files.newBufferedReader(path)) {
            ImmutableSet.Builder<String> builder = ImmutableSet.builder();
            String line;
            while ((line = reader.readLine()) != null) {
                if (!(line = line.trim()).isEmpty()) {
                    builder.add(line);
                }
            }
            return builder.build();
        }
    }

}