import java.io.*;
import java.util.Vector;

public class LetterTemplateCollection implements CollectionIF
{
	private String dbname;
	private Vector vTemplates;
	
	public LetterTemplateCollection( String filename )
	{
		dbname = filename;
		vTemplates = new Vector();
	}
			
	public int getNextID()
	{  
		if ( vTemplates.isEmpty() ) return 1;
		return ((LetterTemplate) (vTemplates.lastElement())).getID() + 1;
	}
	
	public void addRecord(Vector v)
	{
		System.out.println("inside template add record");
		LetterTemplate template = new LetterTemplate();
		template.setID( Integer.parseInt( (String) v.elementAt(0)) );
		template.setName( (String) v.elementAt(1));
		template.setBody( "default body");
		vTemplates.addElement( template );
	}
	
	public void loadRecords()
	{
		DataInputStream infile_template = null;
		
		LetterTemplate template;
		try
		{
			infile_template = new DataInputStream( new FileInputStream( dbname ) );
		}
		catch ( FileNotFoundException e ) {}
		
		while ( true )
		{
			template = new LetterTemplate();
			try
			{
				template.retrieve( infile_template );
				infile_template.readByte();
				vTemplates.addElement( template );
			}
			catch ( EOFException eof ) 
			{
				System.out.println("We have hit end of file!"); 
				break;
			}
			catch ( IOException e ){ }
		}
	}
	
	public void storeRecords()
	{
		DataOutputStream outfile_template = null;
		try 
		{
			outfile_template = new DataOutputStream( new FileOutputStream( dbname ) );
		}
		catch ( IOException e ) {}
	
		for ( int i = 0; i < vTemplates.size(); i++ )
		{
			LetterTemplate template = (LetterTemplate) vTemplates.elementAt( i );
			template.persist( outfile_template );
			try 
			{
				outfile_template.writeByte( (byte) '¬' );
			}
			catch ( IOException e ) {}
		}
	}
	
	public void modifyRecord( Vector v )
	{
		System.out.println("i am in here");
		for ( int i = 0; i < vTemplates.size(); i++ )
			if ( ( (LetterTemplate) vTemplates.elementAt( i )).equals( v ) ) 
			{
				( (LetterTemplate) vTemplates.elementAt( i ) ).update( v );
			}
	}
	
	public void deleteRecord( int i )
	{
		vTemplates.removeElementAt( i );
	}

	public PersistentObject getRecord( int i )
	{
		return (PersistentObject) vTemplates.elementAt( i );
	}
	
	public int size()
	{
		return vTemplates.size();
	}
}