sdis1819-t4g11

package utils;

import java.io.File;

import java.io.IOException;

/**

 * Utils

 */

public class Utils {

    public static boolean isInteger(String s) {

        if (s.isEmpty())

            return false;

        for (int i = 0; i < s.length(); i++) {

            if (i == 0 && s.charAt(i) == '-') {

                if (s.length() == 1)

                    return false;

                else

                    continue;

            }

            if (Character.digit(s.charAt(i), 10) < 0)

                return false;

        }

        return true;

    }

    public static boolean fileExists(String filePath) {

        return new File(filePath).isFile();

    }

    public static boolean isFloat(String s) {

        return s.matches("[0-9]*\\.?[0-9]+");

    }

    public static boolean deleteDirectoryRecursively(File file) /*throws IOException */{

        /*if (file.isDirectory()) {

            File[] entries = file.listFiles();

            if (entries != null) {

                for (File entry : entries) {

                    deleteDirectoryRecursively(entry);

                }

            }

        }

        return file.delete();

        if (!file.delete()) {

            throw new IOException("Failed to delete " + file);

        }*/

        File[] files = file.listFiles();

        if(files!=null) {

            for(File f: files) {

                if(f.isDirectory()) {

                    deleteDirectoryRecursively(f);

                } else {

                    f.delete();

                }

            }

        }

        return file.delete();

    }