aswi2020horky-gitlab/demo_jh/Deserializer_tests/src/app/App.java @ b8fb2f0d

package app;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class App 
{
    
    /**
    * When the Serialized and deserialized classes are same, but placed in diff
    * packages, the deserialization does not work.
    * When they are 
    * **/
    public static void main(String[] args) throws Exception 
    {
        try{
            System.out.println("Starting...");

            App thisApp = new App();
            //thisApp.Serialize(new SampleClassesOK.Simple(), "serialized/simple.out");
            
            SampleClassesOK.Simple test1 = thisApp.Deserialize("serialized/simple.out");

        }catch(Exception e)
        {
            System.out.println(e.toString());
            System.out.println(e.getMessage());
        }
    }

    private <T> T Deserialize(String inputFilePath)
    {
        try 
        {
            FileInputStream fis = new FileInputStream(inputFilePath);
            ObjectInputStream ois = new ObjectInputStream(fis);
            T deserialized = (T) ois.readObject();
            System.out.println(deserialized.toString());
            ois.close();

            return deserialized;
        } 
        catch (IOException e) 
        {
            e.printStackTrace();
        } 
        catch (ClassNotFoundException e) 
        {
            e.printStackTrace();
        }
        return null;
    }

    /** 
     * Standard way  of serializing objects with java.
     * 
     * Taken from example method, doc
    **/
    private void Serialize(Object obj, String outputPath) 
    {
        try
        {
            File toWrite = new File(outputPath);
            toWrite.createNewFile();

			FileOutputStream fos = new FileOutputStream(toWrite, false);
			ObjectOutputStream oos = new ObjectOutputStream(fos);
			
			oos.writeObject(obj);
			oos.flush();
			oos.close();
			System.out.println("serialized.");
        } 
        catch (Exception e) 
        {
			e.printStackTrace();
		}
    }
}