import java.io.*;
import java.util.Scanner;

class DataDescription
{
   String fieldName;
   String fieldType;
   int    fieldSize;
}

public class ReadMetaData
{
   static int MAXNFIELDS = 10;      // Max. # fields in 1 record

   static int n_fields;             // Actual number of fields

   /* ------------------------------------------------------------
      (1) Variables used to store the DESCRIPTION of the data
      ------------------------------------------------------------ */
   static DataDescription[] dataDes = new DataDescription[MAXNFIELDS];

   // This is a CONSTRUCTOR method for the static variable  dataDes
   static
   {
      // Need to create objects for the dataDes[]
      for ( int i = 0; i < MAXNFIELDS; i++ )
      {
	 dataDes[i] = new DataDescription();
      }
   }





   public static void main(String[] args) throws IOException
   {
      Scanner in = new Scanner(System.in);

      /* ===========================================================
	 We must first find out the STRUCTURE of the data file
	 This information is stored in the data DESCRIPTION file
	 =========================================================== */

      DataFile descrFile = new DataFile("db-description");
			 // 1. Open the data description file

      /* -------------------------------------------------------
	 Read in the data description and store them in the
	 DataDes[] array (define in (1))
         ------------------------------------------------------- */

      n_fields = 0;                 // Count the actual number of fields in data
      while ( true )
      {
         try
         {
            dataDes[n_fields].fieldName = descrFile.ReadString(24);
            dataDes[n_fields].fieldType = descrFile.ReadString(4);
            dataDes[n_fields].fieldSize = descrFile.ReadInt();

            System.out.println("Read an entry: " + dataDes[n_fields].fieldName
		+ ", type: " + dataDes[n_fields].fieldType
		+ ", size: " + dataDes[n_fields].fieldSize);

	    n_fields++;
         }
         catch ( IOException e )
         {
            System.out.println("\nFinish reading data description file....\n");
            break;   // Read error: no more data !!!
         }
      }


      /* ========================================================
         Done...
	 Show what we have read in
	 ======================================================== */
      for ( int i = 0; i < n_fields; i++ )
      {
	  System.out.println("dataDes[" + i + "] =    " +
            	dataDes[i].fieldName + "\t" +
            	dataDes[i].fieldType + "\t" +
            	dataDes[i].fieldSize );
      }

   }
}