package org.greenstone.gsdl3.gs3build.doctypes;

import java.io.*;
import java.net.URL;

public class DocumentLoader
{
  public static String getAsString(InputStream in)
  { StringBuffer reply;
    byte 	data[] = new byte[1024];
    int		databytes;

    reply	= new StringBuffer();
    
    try
    {
      do
      { databytes = in.read(data);
        if (databytes > 0)
	{ reply.append(new String(data, 0, databytes));
	}
      } while (databytes >= 0);
    }
    catch (IOException io)
    {
    }
    
    return reply.toString();
  }

  public static String getAsString(File file)
  { FileInputStream in;
    String          reply = null;

    try
    { in	= new FileInputStream(file);
      if (in == null)
	{	return null;
	}
      reply = getAsString(in);
      
      in.close();
    }
    catch (IOException io)
    { return null;
    }
    return reply;
  }

  public static String getAsString(URL url)
  { if (url.toString().startsWith("file://"))
    { File file = new File(url.toString().substring(7));
      return getAsString(file);
    }
    else if (url.toString().startsWith("file:/"))
    { File file = new File(url.toString().substring(5));
      return getAsString(file);
    }
  
    return null;
  }
}