import java.io.*;

public class ReadLevelSequentialFile
{
    // instance variables - replace the example below with your own
    private ObjectInputStream input;
    private String fileName;

    /**
     * Constructor for objects of class ReadSequentialFile
     */
    public ReadLevelSequentialFile(String fileName)
    {
        // initialise instance variables
        this.fileName = fileName;
    }

    /**
     * An example of a method - replace this comment with your own
     * 
     * @param  y   a sample parameter for a method
     * @return     the sum of x and y 
     */
    public void openFile()
    {
        try //opening file
        {
            input = new ObjectInputStream(new FileInputStream("H:\\" + getFileName() + ".lvl"));
        } // end try
        catch (IOException ioException)
        {
            System.err.println("Error Opening File.");
        } // end catch
        
    } // opening file
    
    
    public void readATCRecords()
    {
        Level level;

        
        try // read from file
        {
            while (true)
            {
                
                level = (Level)input.readObject();
                Level newLevel = new Level(level.getName(), level.getDescription(), level.getRunways(), 
                level.getFrequency(), level.getNumberOfAircraft());

            } // while
        }
        catch(EOFException endOfFileException)
        {
            return;
        }
        catch(ClassNotFoundException classNotFoundException)
        {
            System.err.println("Unable to create object.");
        }
        catch(IOException ioException)
        {
            System.err.println("Error during read from file");
        }
        
    } // end reading
    
    public String getFileName()
    {
        return fileName;
    }
     
    public void closeFile()
    {
        try // close file and exit
        {
            if (input != null)
                input.close();
        }
        catch(IOException ioException)
        {
            System.err.println("Error closing file.");
            System.exit(1);
        }
    }
        
            
}