1 // See README.txt for information and build instructions. 2 3 import com.example.tutorial.AddressBookProtos.AddressBook; 4 import com.example.tutorial.AddressBookProtos.Person; 5 import java.io.BufferedReader; 6 import java.io.FileInputStream; 7 import java.io.FileNotFoundException; 8 import java.io.FileOutputStream; 9 import java.io.InputStreamReader; 10 import java.io.IOException; 11 import java.io.PrintStream; 12 13 class AddPerson { 14 // This function fills in a Person message based on user input. 15 static Person PromptForAddress(BufferedReader stdin, 16 PrintStream stdout) throws IOException { 17 Person.Builder person = Person.newBuilder(); 18 19 stdout.print("Enter person ID: "); 20 person.setId(Integer.valueOf(stdin.readLine())); 21 22 stdout.print("Enter name: "); 23 person.setName(stdin.readLine()); 24 25 stdout.print("Enter email address (blank for none): "); 26 String email = stdin.readLine(); 27 if (email.length() > 0) { 28 person.setEmail(email); 29 } 30 31 while (true) { 32 stdout.print("Enter a phone number (or leave blank to finish): "); 33 String number = stdin.readLine(); 34 if (number.length() == 0) { 35 break; 36 } 37 38 Person.PhoneNumber.Builder phoneNumber = 39 Person.PhoneNumber.newBuilder().setNumber(number); 40 41 stdout.print("Is this a mobile, home, or work phone? "); 42 String type = stdin.readLine(); 43 if (type.equals("mobile")) { 44 phoneNumber.setType(Person.PhoneType.MOBILE); 45 } else if (type.equals("home")) { 46 phoneNumber.setType(Person.PhoneType.HOME); 47 } else if (type.equals("work")) { 48 phoneNumber.setType(Person.PhoneType.WORK); 49 } else { 50 stdout.println("Unknown phone type. Using default."); 51 } 52 53 person.addPhone(phoneNumber); 54 } 55 56 return person.build(); 57 } 58 59 // Main function: Reads the entire address book from a file, 60 // adds one person based on user input, then writes it back out to the same 61 // file. 62 public static void main(String[] args) throws Exception { 63 if (args.length != 1) { 64 System.err.println("Usage: AddPerson ADDRESS_BOOK_FILE"); 65 System.exit(-1); 66 } 67 68 AddressBook.Builder addressBook = AddressBook.newBuilder(); 69 70 // Read the existing address book. 71 try { 72 FileInputStream input = new FileInputStream(args[0]); 73 addressBook.mergeFrom(input); 74 input.close(); 75 } catch (FileNotFoundException e) { 76 System.out.println(args[0] + ": File not found. Creating a new file."); 77 } 78 79 // Add an address. 80 addressBook.addPerson( 81 PromptForAddress(new BufferedReader(new InputStreamReader(System.in)), 82 System.out)); 83 84 // Write the new address book back to disk. 85 FileOutputStream output = new FileOutputStream(args[0]); 86 addressBook.build().writeTo(output); 87 output.close(); 88 } 89 } 90
