// File: read_geodata3.java
//
// Author: Rahul Simha
// Created: Aug 18, 1998
//
// Illustrates multi-file encapsulation. Goes
// together with useful_io.java.

import java.io.*;

public class read_geodata3 {

  public static void main (String[] argv)
  {
    // Get file name
    String filename = useful_io.read_string ("Enter filename: ");

    try {
      FileReader fr = new FileReader (filename);
      LineNumberReader lr = new LineNumberReader (fr);

      // Now read the input lines
      boolean over = false;    
      int n_lines = 0;     
      do {
        String input_line = lr.readLine ();

        if (input_line != null) {

          System.out.println ("Line " + (++n_lines) + ": " + input_line);
	  input_line = input_line.trim ();

          if (input_line.equals ("Circle:")) {  // Circle
            input_line = lr.readLine ();
            double cx = useful_io.read_property (input_line, "center.x");
            input_line = lr.readLine ();
            double cy = useful_io.read_property (input_line, "center.y");
            input_line = lr.readLine ();
            double r = useful_io.read_property (input_line, "radius");
            double area = 3.14159 * r * r;
            System.out.println ("Circle: cx=" + cx + " cy=" + cy +
                                 " r=" + r + " area=" + area);
	  }
          else if (input_line.equals ("Rectangle:")) { // Rectangle
            input_line = lr.readLine ();
            double tx = useful_io.read_property (input_line, "topleft.x");
            input_line = lr.readLine ();
            double ty = useful_io.read_property (input_line, "topleft.y");
            input_line = lr.readLine ();
            double bx = useful_io.read_property (input_line, "bottomright.x");
            input_line = lr.readLine ();
            double by = useful_io.read_property (input_line, "bottomright.y");
            double area = (bx - tx) * (ty - by);
            System.out.println ("Rectangle: tx=" + tx + " ty=" + ty +
                                "  bx=" + bx + " by=" + by +
                                " area=" + area);
	  }
          else if (input_line.equals ("Square:")) { // Square
            input_line = lr.readLine ();
            double tx = useful_io.read_property (input_line, "topleft.x");
            input_line = lr.readLine ();
            double ty = useful_io.read_property (input_line, "topleft.y");
            input_line = lr.readLine ();
            double side = useful_io.read_property (input_line, "side");
            double area = side * side;
            System.out.println ("Square: tx=" + tx + " ty=" + ty +
                                " area=" + area);
	  }
          else {
            System.out.println ("Unrecognizable: " + input_line);
	  }
        }
        else
          over = true;
      } while (! over);

      // Close the file.
      lr.close();

    }
    catch (IOException e) {
      System.out.println (e);
    }

  }

} // End of read_geodata3.java