Aufgabe9_GrafikMVC/src/mvcgrafik/model/GrafikModel.java

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package mvcgrafik.model;

import java.awt.Point;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 *
 * @author le
 */
public class GrafikModel
{
  private ArrayList<Point> punkte;
  private ArrayList<ArrayList> figuren;
  
  public GrafikModel()
  {
    punkte = new ArrayList<>();
    figuren = new ArrayList<>();
  }
  
  public void addPoint(Point p)
  {
    punkte.add(p);
  }

  public List<Point> getPunkte()
  {
    return Collections.unmodifiableList(punkte);
  }
  
  public List<ArrayList> getFiguren(){
    return Collections.unmodifiableList(figuren);
  }
  
  
  /**
   * Persistenz via Serialisierung
   * @param dateiname
   * @throws FileNotFoundException
   * @throws IOException 
   */
  public void speicherePunkte(String dateiname) throws FileNotFoundException, IOException
  {
    // an Preferences denken!!
    FileOutputStream fos = new FileOutputStream(dateiname);
    //wichtig Puffer -> Performance
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    //Serialisierung
    ObjectOutputStream oos = new ObjectOutputStream(bos);
    oos.writeObject(punkte);
    oos.flush(); // Puffer
    oos.close();
  }
  
  public void lesePunkte(String dateiname) throws FileNotFoundException, IOException, ClassNotFoundException
  {
    // an Preferences denken!!
    FileInputStream fis = new FileInputStream(dateiname);
    //wichtig Puffer -> Performance
    BufferedInputStream bis = new BufferedInputStream(fis);
    //Serialisierung
    ObjectInputStream ois = new ObjectInputStream(bis);
    Object daten = ois.readObject(); // Achtung
//    if (daten instanceof ArrayList)
//    {
//      punkte = (ArrayList<Point>)daten;
//    }
    //eleganter
    if (daten instanceof ArrayList liste)
    {
      punkte = liste;
    }
    
  }  

    public void endShape() {
        figuren.add(new ArrayList<Point>(punkte));
        punkte.clear();
    }
  
  
  
}