/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2009, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.exoplatform.kernel.it;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;

/**
 * @author <a href="mailto:mstrukel@redhat.com">Marko Strukelj</a>
 */
public class LineReader extends BufferedReader
{
   private String lastLine;
   private String unreadLine;

   public LineReader(Reader reader)
   {
      super(reader);
   }

   public LineReader(Reader reader, int size)
   {
      super(reader, size);
   }

   public String readLine() throws IOException
   {
      if (unreadLine != null)
      {
         lastLine = unreadLine;
         unreadLine = null;
      }
      else
      {
         lastLine = super.readLine();
      }
      return lastLine;
   }

   public void unreadLastLine()
   {
      if (unreadLine != null)
      {
         throw new RuntimeException("Can't unread multiple lines!");
      }
      unreadLine = lastLine;
   }
}
