FileUtil.java

/*
 * Copyright 2005-2015 by BerryWorks Software, LLC. All rights reserved.
 *
 * This file is part of EDIReader. You may obtain a license for its use directly from
 * BerryWorks Software, and you may also choose to use this software under the terms of the
 * GPL version 3. Other products in the EDIReader software suite are available only by licensing
 * with BerryWorks. Only those files bearing the GPL statement below are available under the GPL.
 *
 * EDIReader is free software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * EDIReader 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 for more details.
 *
 * You should have received a copy of the GNU General Public License along with EDIReader.  If not,
 * see <http://www.gnu.org/licenses/>.
 */

package com.berryworks.edireader.util;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;

public class FileUtil {

    public static String fileToString(String filename) throws IOException {
        byte[] encoded = Files.readAllBytes(Paths.get(filename));
        return StandardCharsets.UTF_8.decode(ByteBuffer.wrap(encoded)).toString();
    }

    public static void stringToFile(String data, String filename) throws IOException {
        try (Writer writer = new FileWriter(filename)) {
            writer.write(data);
        }
    }

    public static byte[] fileToByteArray(File file) throws IOException {
        return Files.readAllBytes(Paths.get(file.getPath()));
    }

    public static File locateDirectory(String directoryName) {

        File directory = new File(directoryName);
        if (directory.exists() && directory.isDirectory()) {
            return directory;
        }

        directory = new File("../" + directoryName);
        if (directory.exists() && directory.isDirectory()) {
            return directory;
        }

        throw new RuntimeException("Cannot locate directory " + directoryName);
    }

}