import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class JSONReader {

    private Map<String, String> data = new HashMap<String, String>();

    public JSONReader(String file) throws EmptyJSONFileException, MalformedURLException, IOException {
        this(new URL(file));
    }

    public JSONReader(URL file) throws IOException, EmptyJSONFileException {
        InputStream in;
        in = file.openStream();
        Scanner s = new Scanner(in, "UTF-8");
        while (s.hasNextLine())
            parse(s.nextLine());
        s.close();
    }

    public JSONReader(File file) throws FileNotFoundException, EmptyJSONFileException {
        InputStream in;
        in = new FileInputStream(file);
        Scanner s = new Scanner(in, "UTF-8");
        while (s.hasNextLine())
            parse(s.nextLine());
        s.close();
    }

    private void parse(String s) throws EmptyJSONFileException {
        if (s.equals("[]"))
            throw new EmptyJSONFileException();
        String[] data1 = s.split(",\"");
        for (String a : data1) {
            String[] ddata = a.replaceAll("\\}\\]|\\{\\[|\\[\\{\"|\\}", "").split("\":");
            data.put(ddata[0], trim(ddata[1]));
        }
    }

    public String get(String key) {
        try {
            return data.get(key);
        }
        catch (NullPointerException e) {
            return "";
        }
    }

    private String trim(String s) {
        if (s.startsWith("\"") && s.endsWith("\""))
            return s.substring(1, s.length() - 1);
        else if (s.startsWith("\""))
            return s.substring(1);
        else if (s.endsWith("\""))
            return s.substring(0, s.length() - 1);
        return s;
    }

}