//?See?README.txt?for?information?and?build?instructions.

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?{
??????FileInputStream?input?=?new?FileInputStream（args[0]）;
??????try?{
????????addressBook.mergeFrom（input）;
??????}?finally?{
????????try?{?input.close（）;?}?catch?（Throwable?ignore）?{}
??????}
????}?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]）;
????try?{
??????addressBook.build（）.writeTo（output）;
????}?finally?{
??????output.close（）;
????}
??}
}