96 lines
2.9 KiB
Java
96 lines
2.9 KiB
Java
// See README.txt for information and build instructions.
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import com.example.tutorial.AddressBookProtos.AddressBook;
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import com.example.tutorial.AddressBookProtos.Person;
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import java.io.BufferedReader;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.InputStreamReader;
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import java.io.IOException;
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import java.io.PrintStream;
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class AddPerson {
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// This function fills in a Person message based on user input.
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static Person PromptForAddress(BufferedReader stdin,
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PrintStream stdout) throws IOException {
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Person.Builder person = Person.newBuilder();
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stdout.print("Enter person ID: ");
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person.setId(Integer.valueOf(stdin.readLine()));
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stdout.print("Enter name: ");
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person.setName(stdin.readLine());
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stdout.print("Enter email address (blank for none): ");
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String email = stdin.readLine();
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if (email.length() > 0) {
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person.setEmail(email);
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}
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while (true) {
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stdout.print("Enter a phone number (or leave blank to finish): ");
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String number = stdin.readLine();
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if (number.length() == 0) {
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break;
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}
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Person.PhoneNumber.Builder phoneNumber =
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Person.PhoneNumber.newBuilder().setNumber(number);
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stdout.print("Is this a mobile, home, or work phone? ");
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String type = stdin.readLine();
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if (type.equals("mobile")) {
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phoneNumber.setType(Person.PhoneType.MOBILE);
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} else if (type.equals("home")) {
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phoneNumber.setType(Person.PhoneType.HOME);
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} else if (type.equals("work")) {
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phoneNumber.setType(Person.PhoneType.WORK);
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} else {
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stdout.println("Unknown phone type. Using default.");
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}
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person.addPhone(phoneNumber);
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}
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return person.build();
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}
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// Main function: Reads the entire address book from a file,
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// adds one person based on user input, then writes it back out to the same
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// file.
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public static void main(String[] args) throws Exception {
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if (args.length != 1) {
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System.err.println("Usage: AddPerson ADDRESS_BOOK_FILE");
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System.exit(-1);
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}
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AddressBook.Builder addressBook = AddressBook.newBuilder();
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// Read the existing address book.
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try {
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FileInputStream input = new FileInputStream(args[0]);
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try {
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addressBook.mergeFrom(input);
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} finally {
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try { input.close(); } catch (Throwable ignore) {}
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}
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} catch (FileNotFoundException e) {
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System.out.println(args[0] + ": File not found. Creating a new file.");
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}
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// Add an address.
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addressBook.addPerson(
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PromptForAddress(new BufferedReader(new InputStreamReader(System.in)),
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System.out));
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// Write the new address book back to disk.
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FileOutputStream output = new FileOutputStream(args[0]);
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try {
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addressBook.build().writeTo(output);
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} finally {
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output.close();
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}
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}
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}
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