package tutorial;
option java_package = "com.example.tutorial";
option java_outer_classname = "AddressBookProtos";
message Person {required string name = 1;required int32 id = 2; // Unique ID number for this person.optional string email = 3;enum PhoneType {MOBILE = 0;HOME = 1;WORK = 2;}message PhoneNumber {required string number = 1;optional PhoneType type = 2 [default = HOME];}repeated PhoneNumber phone = 4;
}
// Our address book file is just one of these.
message AddressBook {repeated Person person = 1;
}
import com.example.tutorial.AddressBookProtos.AddressBook;
import com.example.tutorial.AddressBookProtos.Person;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.PrintStream;
class AddPerson{ // This function fills in a Person message based on user input. static Person PromptForAddress(BufferedReader stdin,PrintStream stdout)throws IOException{ Person.Builder person = Person.newBuilder();stdout.print("Enter person ID: "); person.setId(Integer.valueOf(stdin.readLine())); stdout.print("Enter name: "); person.setName(stdin.readLine()); stdout.print("Enter email address (blank for none): "); String email = stdin.readLine(); if (email.length() > 0){ person.setEmail(email); } while (true){ stdout.print("Enter a phone number (or leave blank to finish): ");String number = stdin.readLine(); if (number.length() == 0){ break; } Person.PhoneNumber.Builder phoneNumber = Person.PhoneNumber.newBuilder().setNumber(number);stdout.print("Is this a mobile, home, or work phone? "); String type = stdin.readLine(); if (type.equals("mobile")){ phoneNumber.setType(Person.PhoneType.MOBILE); } else if (type.equals("home")) { phoneNumber.setType(Person.PhoneType.HOME); } else if (type.equals("work")) { phoneNumber.setType(Person.PhoneType.WORK); } else { stdout.println("Unknown phone type. Using default."); } person.addPhone(phoneNumber); } return person.build(); } // Main function: Reads the entire address book from a file, adds one person based on user input, //then writes it back out to the same file. public static void main(String[] args) throws Exception{ if (args.length != 1) { System.err.println("Usage: AddPerson ADDRESS_BOOK_FILE"); System.exit(-1); } AddressBook.Builder addressBook = AddressBook.newBuilder(); // Read the existing address book. try { addressBook.mergeFrom(new FileInputStream(args[0])); } catch (FileNotFoundException e) { System.out.println(args[0] + ": File not found. Creating a new file."); } // Add an address. addressBook.addPerson( PromptForAddress(new BufferedReader(new InputStreamReader(System.in)), System.out)); // Write the new address book back to disk. FileOutputStream output = new FileOutputStream(args[0]); addressBook.build().writeTo(output); output.close(); }
}
import com.example.tutorial.AddressBookProtos.AddressBook;
import com.example.tutorial.AddressBookProtos.Person;
import java.io.FileInputStream; public class ListPeople { // Iterates though all people in the AddressBook and prints info about them. static void Print(AddressBook addressBook) { for (Person person: addressBook.getPersonList()) { System.out.println("Person ID: " + person.getId()); System.out.println(" Name: " + person.getName()); if (person.hasEmail()) { System.out.println(" E-mail address: " + person.getEmail()); } for (Person.PhoneNumber phoneNumber : person.getPhoneList()) { switch (phoneNumber.getType()) { case MOBILE: System.out.print(" Mobile phone #: "); break; case HOME: System.out.print(" Home phone #: "); break; case WORK: System.out.print(" Work phone #: "); break; } System.out.println(phoneNumber.getNumber()); } } } // Main function: Reads the entire address book from a file and prints all the information inside. /*** @param args* @throws Exception*/public static void main(String[] args) throws Exception { if (args.length != 1) { System.err.println("Usage: ListPeople ADDRESS_BOOK_FILE"); System.exit(-1); } // Read the existing address book. AddressBook addressBook = AddressBook.parseFrom(new FileInputStream(args[0]));Print(addressBook); }
}
