com.github.robozonky.internal.util.FileUtil Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of robozonky-api Show documentation
There is a newer version: 6.4.1
/*
 * Copyright 2020 The RoboZonky Project
 *
 * Licensed 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 com.github.robozonky.internal.util;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Stream;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.github.robozonky.internal.util.functional.Either;

public final class FileUtil {

    private static final Logger LOGGER = LogManager.getLogger(FileUtil.class);

    private FileUtil() {
        // no instances
    }

    public static boolean configurePermissions(final File f, final boolean executable) {
        var ownerOnly = true;
        return f.setWritable(true, ownerOnly) &&
                f.setReadable(true, ownerOnly) &&
                f.setExecutable(executable, ownerOnly);
    }

    public static boolean isJarFile(final File f) {
        return f.isFile() && f.getPath()
            .toLowerCase()
            .endsWith(".jar");
    }

    public static Either> findFolder(final String folderName) {
        final Path root = new File(System.getProperty("user.dir")).toPath();
        try (var folders = Files.find(root, 1, (path, attr) -> attr.isDirectory())) {
            return Either.right(folders.map(Path::toFile)
                .filter(f -> Objects.equals(f.getName(), folderName))
                .findFirst());
        } catch (Exception ex) {
            LOGGER.warn("Exception while walking file tree.", ex);
            return Either.left(ex);
        }
    }

    public static Stream filesToUrls(final File... jars) {
        if (jars == null) {
            throw new IllegalArgumentException("Null");
        }
        return Stream.of(jars)
            .map(f -> {
                try {
                    return Optional.of(f.toURI()
                        .toURL());
                } catch (final MalformedURLException e) {
                    LOGGER.debug("Skipping file: '{}'.", f, e);
                    return Optional.empty();
                }
            })
            .flatMap(Optional::stream);
    }
}