/* XLogo4Schools - A Logo Interpreter specialized for use in schools, based on XLogo by Loic Le Coq
 * Copyright (C) 2013 Marko Zivkovic
 * 
 * Contact Information: marko88zivkovic at gmail dot com
 * 
 * This program is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU General Public License as published by the Free 
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.  This program is distributed in the hope that it will be 
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 
 * Public License for more details.  You should have received a copy of the 
 * GNU General Public License along with this program; if not, write to the Free 
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
 * MA 02110-1301, USA.
 * 
 * 
 * This Java source code belongs to XLogo4Schools, written by Marko Zivkovic
 * during his Bachelor thesis at the computer science department of ETH Zurich,
 * in the year 2013 and/or during future work.
 * 
 * It is a reengineered version of XLogo written by Loic Le Coq, published
 * under the GPL License at http://xlogo.tuxfamily.org/
 * 
 * Contents of this file were initially written by Loic Le Coq,
 * modifications, extensions, refactorings might have been applied by Marko Zivkovic 
 */

package xlogo.kernel;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class MyFlowReader extends MyFlow
{
	BufferedReader	bfr;
	
	boolean isReader()
	{
		return true;
	}
	
	MyFlowReader(MyFlow flow)
	{
		super(flow);
	}
	
	String readLine() throws FileNotFoundException, IOException
	{
		if (null == bfr)
			bfr = new BufferedReader(new FileReader(getPath()));
		String line = bfr.readLine();
		return line;
	}
	
	int readChar() throws FileNotFoundException, IOException
	{
		if (null == bfr)
			bfr = new BufferedReader(new FileReader(getPath()));
		int character = bfr.read();
		return character;
	}
	
	int isReadable() throws FileNotFoundException, IOException
	{
		if (null == bfr)
			bfr = new BufferedReader(new FileReader(getPath()));
		bfr.mark(2);
		int id = bfr.read();
		bfr.reset();
		return id;
	}
	
	void close() throws IOException
	{
		if (null != bfr)
			bfr.close();
	}
}