Creational Patterns - Applied Java Patterns - page 5

4. private String region;
5. private String postalCode;
6.
7. public static final String EOL_STRING =
8. System.getProperty("line.separator");
9. public static final String SPACE = " ";
10.
11. public String getStreet() {
return street;
}
12. public String getCity() {
return city;
}
13. public String getPostalCode() {
return postalCode;
}
14. public String getRegion() {
return region;
}
15. public abstract String getCountry();
16.
17. public String getFullAddress() {
18. return street + EOL_STRING +
19. city + SPACE + postalCode + EOL_STRING;
20. }
21.
22. public void setStreet(String newStreet) {
street = newStreet;
}
23. public void setCity(String newCity) {
city = newCity;
}
24. public void setRegion(String newRegion) {
region = newRegion;
}
25. public void setPostalCode(String newPostalCode) {
postalCode = newPostalCode;
}
26. }
Example 1.3 PhoneNumber.java
1. public abstract class PhoneNumber{
2. private String phoneNumber;
3. public abstract String getCountryCode();
4.
5. public String getPhoneNumber() {
return phoneNumber;
}
6.
7. public void setPhoneNumber(String newNumber) {
8. try {
9. Long.parseLong(newNumber);
10. phoneNumber = newNumber;
11. }
12. catch (NumberFormatException exc) {
13. }
14. }
15. }
Address and PhoneNumber are abstract classes in this example, but could easily be defined as interfaces if you
did not need to define code to be used for all concrete products.
To provide concrete functionality for the system, you need to create Concrete Factory and Concrete Product
classes. In this case, you define a class that implements AddressFactory , and subclass the Address and
PhoneNumber classes. The three following classes show how to do this for U.S. address information.
Example 1.4 USAddressFactory.java
1. public class USAddressFactory implements AddressFactory{
2. public Address createAddress(){
3. return new USAddress();
4. }
5.
6. public PhoneNumber createPhoneNumber(){
7. return new USPhoneNumber();
8. }