//An instance of this class provided methods to parse
// a standard format US address
//PUBLIC INTERFACE  
// Constructor
//    AddressParser(String address)
// Accessor                :  Example
//    String getAddress()  :  11200 SW 8 Street, Miami, Florida 33199
// Other Methods
//    String number()      :  11200
//    String street()      :  SW 8 Street
//    String city()        :  Miami
//    String state()       :  FL
//    String zipCode()     :  33199
public class AddressParser
{
   //Instance Variable
   private final String address;

   //Constructor
   public AddressParser(String address)
   {
      validate(address);         
      this.address = address.trim();
   }
   
   //Accessor
   public String getAddress()
   {
      return this.address;
   }
   
   //************************ Parsing Methods ************************
   // number(), street(), city(), state(), zipCode()
   // All return a String value
   //(Internal use) Class Constants
   private static final char SPACE = ' ';
   private static final char COMMA = ',';
   




   
   //********************* Constructor Helper ************************
   // Partial validation/check for standard US address format
   // AddressException thrown if an invalid format is detected
    private static void validate(String address)
   {
      address = address.trim();
      
      if (address.length() < 16)
         throw new AddressException("Invalid Length");
         
      //Indexes of first space and comma
      int space1 = address.indexOf(SPACE);
      int comma1 = address.indexOf(COMMA);
      
      if (space1 < 0 || comma1 < 0) //No space or no comma
         throw new AddressException("Invalid Address Format");
         
      //Indexes of last space and comma
      int space2 = address.lastIndexOf(SPACE);
      int comma2 = address.lastIndexOf(COMMA);
      
      if (comma2 == comma1 || space2 == space1) //Only 1 space or 1 comma
         throw new AddressException("Invalid Address Format");
      
      if (space1 > comma1 || comma2 > space2)   //Incorrect comma placement
         throw new AddressException("Invalid Address Format");
   }
}