include java.io.File;
include java.io.FileInputStream;
include java.io.InputStream;
include java.io.FileWriter;

String readTextFile(String fileName)
{
	String result = null;
	File f = new File(fileName);
	if(f.exists())
	{
		long len = f.length();
		if(len > 0)
		{
			try
			{
				FileInputStream inputStream = new FileInputStream(f);
				byte[] buf = new byte[(int)len];
				inputStream.read(buf);
				result = new String(buf);
			}
			catch(Exception e)
			{
				obj_id self = getSelf();
				sendSystemMessageTestingOnly(self, "An exception occurred while trying to read " + fileName);
			}
		}
	}
	return result;
}

boolean isWritable(String fileName)
{
	boolean result = false;
	File f = new File(fileName);
	if(f.exists())
	{
		if(f.canWrite())
		{
			result = true;
		}
	}
	return result;
}

boolean writeTextFile(String fileName, String fileContents)
{
	boolean result = false;
	File f = new File(fileName);

	if(!f.exists())
	{
		try
		{
			f.createNewFile();
		}
		catch(Exception e)
		{
			return false;
		}
	}
	
	if(f.canWrite())
	{
		f.delete();
		try
		{
			if(f.createNewFile())
			{
				FileWriter writer = new FileWriter(f);
				writer.write(fileContents);
				writer.close();
				result = true;
			}   
		}
		catch(Exception e)
		{
			obj_id self = getSelf();
			sendSystemMessageTestingOnly(self, "failed to write " + fileName + " : " + e);
		}
		
	}
	return result;
}