/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
        |                                                                             |
        | 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/

package de.ilias.services.lucene.index.file;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * Handle plain text files
 *
 * @author Stefan Meyer <smeyer.ilias@gmx.de>
 * @version $Id$
 */
public class PlainTextHandler implements FileHandler {

	/**
	 * 
	 */
	public PlainTextHandler() {
	}

	/**
	 * @see de.ilias.services.lucene.index.file.FileHandler#getContent(java.io.InputStream)
	 */
	public String getContent(InputStream is) throws FileHandlerException {

		StringBuilder content = new StringBuilder();
        BufferedReader br = new BufferedReader(new InputStreamReader(is));

        is = transformStream(is);
        try {
            String line = null;
			while((line = br.readLine()) != null) {
			    content.append(' ');
				content.append(line);
			}
	        return content.toString();
		} 
        catch (IOException e) {
        	throw new FileHandlerException("Cannot read plain text file: " + e);
        }
        finally {
        	if(br != null) {
				try {
					br.close();
				} 
				catch (IOException e) {
				}
        	}
        }
	}

	/**
	 * @see de.ilias.services.lucene.index.file.FileHandler#transformStream(java.io.InputStream)
	 */
	public InputStream transformStream(InputStream is) {

		return is;
	}
}
