FileUtil.java

package eu.europeana.cloud.util;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;

import java.io.*;
import java.nio.file.Files;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

/**
 * Created by Tarek on 9/1/2016.
 */
public class FileUtil {
    private static final int BATCH_MAX_SIZE = 1240 * 4;
    private static final String ZIP_FORMAT_EXTENSION = ".zip";
    private static final String ECLOUD_SUFFIX = "ecloud-dataset";

    public static void persistStreamToFile(InputStream inputStream, String folderPath, String fileName, String extension) throws IOException {
        OutputStream outputStream = null;
        try {
            String filePtah = createFilePath(folderPath, fileName, extension);
            File file = new File(filePtah);
            outputStream = new FileOutputStream(file.toPath().toString());
            byte[] buffer = new byte[BATCH_MAX_SIZE];
            IOUtils.copyLarge(inputStream, outputStream, buffer);
        } finally {
            if (outputStream != null)
                outputStream.close();
            inputStream.close();
        }

    }

    public static String createFilePath(String folderPath, String fileName, String extension) {
        String filePtah = folderPath + fileName;
        if ("".equals(FilenameUtils.getExtension(fileName)))
            filePtah = filePtah + extension;
        return filePtah;
    }


    public static String createFolder() throws IOException {
        String folderName = UUID.randomUUID().toString();
        return Files.createTempDirectory(folderName) + File.separator;

    }

    public static String createZipFolderPath(Date date) {
        String folderName = generateFolderName(date);
        return System.getProperty("user.dir") + "/" + folderName + ZIP_FORMAT_EXTENSION;
    }

    private static String generateFolderName(Date date) {
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss-ssss");
        return ECLOUD_SUFFIX + "-" + dateFormat.format(date);


    }


}