/* the simplest(?) code to read a votable  uses VOTWrap from ivoa download
*/

package readfits;
import edu.jhu.pha.ivoa.*;
import java.io.*;                
import nom.tam.fits.*;
import java.text.*;


class ReadFits {


 public static void main(String[] args) throws Exception{

   int ind =0; 
   if (args.length > 0 ) {
   } else {
	System.out.println("You need to suply the filename of a fits ");
	System.exit(1);
   }

   read(args[0]); 
 }

   public static void read(String fname) throws Exception{
	System.out.println("Reading "+fname);
	Fits theFits = new nom.tam.fits.Fits(fname); //or a url !

	ImageHDU h = (ImageHDU) theFits.readHDU();
	// it may not be an image  so then we would get an exception
        Header head = h.getHeader();
	System.out.println (fname + " has naxis1 "+ head.getDoubleValue("NAXIS1") );
	System.out.println (fname + " has naxis2 "+ head.getDoubleValue("NAXIS2") );

	float[][] img = (float[][])h.getKernel(); // could use get tile

	for (int i =0; i <10; i++) {
		System.out.println(img[i][i]);
	}


   }
}