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package fareed.publications.utilities;
import java.lang.reflect.*;
public class ToStringGenerator
{
    public static void main(String[] args)
     {
       if (args.length == 0)
                {
                  System.out.println("Provide the class name as the command line argument");
                  System.exit(0);
                }
                      
                try {
                
                Class targetClass = Class.forName(args[0]);
                      
                if (!targetClass.isPrimitive() && targetClass != String.class)
                {
                        Field fields[] = targetClass.getDeclaredFields();
                                 
                        Class cSuper = targetClass.getSuperclass(); // Retrieving the super class 
                                            
                        output("StringBuffer buffer = new StringBuffer(500);"); // Buffer Construction 
                                 
                        if (cSuper != null && cSuper != Object.class) {
                          output("buffer.append(super.toString());"); // Super class's toString()
                         }
                                 
                        for (int j = 0; j < fields.length; j++) {
                          output("buffer.append(\"" + fields[j].getName() + " = \");"); // Append Field name
                          if (fields[j].getType().isPrimitive() || fields[j].getType() == String.class) // Check for a primitive or string             
                                output("buffer.append(this." + fields[j].getName() + ");"); // Append the primitive field value 
                          else
                             {
                              /* It is NOT a primitive field so this requires a check for the NULL value for the aggregated object */
                              output("if ( this." + fields[j].getName() + "!= null )" ); 
                              output("buffer.append(this." + fields[j].getName() + ".toString());");
                              output("else buffer.append(\"value is null\"); ");
                             } // end of else
                          } // end of for loop
                                 output("return  buffer.toString();");
                } 
               } catch (ClassNotFoundException e) {
                    System.out.println("Class not found in the class path");
                    System.exit(0);
              } 
       }
           
   private static void output(String data)
     {
        System.out.println(data);
     }
           
}