/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.megatim.queryadhoc.utils;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
import org.apache.tika.parser.txt.CharsetDetector;
import org.apache.tika.parser.txt.CharsetMatch;

/**
 *
 * @author ASUS
 */
public class CommonUtilities {

    private CommonUtilities() {

    }

    /**
     * Méthode qui récupère l'encodage d'un fichier
     *
     * @param file : Fichier dont on veut connaître l'encodage
     * @return : retourne l'encodage le plus probable
     * @throws FileNotFoundException
     * @throws IOException
     */
    public static Charset getCharset(File file) throws FileNotFoundException, IOException {
        try ( InputStream stream = new FileInputStream(file);  InputStream input = new BufferedInputStream(stream);) {
            CharsetDetector charsetDetector = new CharsetDetector();

            charsetDetector.setText(input);

            CharsetMatch charsetMatch = charsetDetector.detect();
            String charsetName = charsetMatch != null ? charsetMatch.getName() : "";

            return Charset.forName(charsetName);

        } catch (UnsupportedCharsetException ex) {
            return Charset.forName("Cp850");
        }
    }
}