/**

* Java. Level 2. Lesson 3. Example of homework

*

* @author Sergey Iryupin

* @version 0.3.4 dated Dec 30, 2017

*/

import java.util.*;

import java.io.IOException;

import java.io.FileWriter;

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

import java.io.BufferedWriter;

import java.nio.file.Paths;

import java.nio.file.Files;

import java.nio.charset.StandardCharsets;

import javax.xml.stream.*;

//import hw3.*; // old variant homework

class HW3Lesson {

static final String TEXT = "If you really want to learn, and you want " +

"to learn more quickly and more deeply, pay attention to how you " +

"pay attention. Think about how you think. Learn how you learn.";

static final String FILE_NAME = "lesson3text.txt";

public static void main(String[] args) throws IOException {

// 1 task

System.out.println("1. Counting words:");

сountWords(TEXT);

// read file to list

List<String> lines =

Files.readAllLines(Paths.get(FILE_NAME), StandardCharsets.UTF_8);

// convert List to Array and Array to string

String[] strings = new String[lines.size()];

strings = lines.toArray(strings);

сountWords(Arrays.toString(strings));

// 2 task

System.out.println("\n2. Phone book:");

testPhoneBook();

}

static void сountWords(String text) {

Integer value;

Map<String, Integer> hm = new TreeMap<>(); // HashMap better for speed

String[] words = text.toLowerCase().split("\\W+");

for (String word : words) {

//value = hm.get(word);

//hm.put(word, ((value == null)? 1 : value + 1));

hm.put(word, hm.getOrDefault(word, 0) + 1);

}

System.out.println(hm);

System.out.println("The phrase has " + words.length + " words and " +

hm.size() + " non-repeated words.");

}

static void testPhoneBook() {

SimplePhoneBook spb = new SimplePhoneBook();

spb.add("Mathew", "863 233 3301");

spb.add("Mark", "863 212 1102");

spb.add("Luke", "863 243 2803");

spb.add("John", "863 240 2704");

spb.add("Luke", "863 248 4512");

System.out.println("Phones of Luke's:");

System.out.println(spb.get("Luke"));

System.out.println(spb);

spb.exportXMLManually("phonebook.xml");

/*

PhoneBook pb = new PhoneBook();

pb.addRecord("John", new PhoneRecord("234-22-12", "john@mail.com"));

pb.addRecord("Smith", new PhoneRecord("234-22-21", "smith@mail.com"));

pb.addRecord("Mike", new PhoneRecord("233-12-12", "mike@mail.com"));

pb.addPhone("Mike", "+1 234 567-89-00");

System.out.println(pb.getPhonesByName("Mike")); // found

System.out.println(pb.getPhonesByName("Bill")); // not found

System.out.println(pb.getEmailsByName("Smith")); // found

System.out.println(pb.getEmailsByName("Joseph")); // not found

*/

}

}

class SimplePhoneBook {

Map<String, String> pb;

SimplePhoneBook() {

pb = new HashMap<>();

}

void add(String name, String phone) {

pb.put(phone, name);

}

List<String> get(String name) {

List<String> list = new ArrayList<>();

for (Map.Entry<String, String> entry : pb.entrySet())

if (name.equals(entry.getValue()))

list.add(entry.getKey());

return list;

}

void export(String fileName) {

try (FileWriter file = new FileWriter(fileName)) {

file.write(toString());

} catch (IOException ex) {

ex.printStackTrace();

}

}

// @see https://docs.oracle.com/cd/E13222_01/wls/docs100/xml/stax.html

// @see http://technojeeves.com/index.php/54-serialize-a-java-collection-with-the-streaming-api

// write using the Streaming API for XML (StAX)

void exportXML(String fileName) {

try (BufferedWriter file = new BufferedWriter(

new OutputStreamWriter(

new FileOutputStream(fileName), "UTF8"))) {

XMLStreamWriter xsw = XMLOutputFactory

.newInstance()

.createXMLStreamWriter(file);

// write the default XML declaration

xsw.writeStartDocument("utf-8", "1.0");

xsw.writeCharacters("\n");

// write a comment

xsw.writeComment("This is a phone book");

xsw.writeCharacters("\n");

// write the root element "phones"

xsw.writeStartElement("phones");

xsw.writeCharacters("\n");

// write all records as list of entry

for (Map.Entry<String, String> e : pb.entrySet()) {

xsw.writeCharacters("\t");

xsw.writeStartElement("phone");

xsw.writeAttribute("name", e.getValue());

//xsw.writeAttribute("key", e.getKey());

xsw.writeCharacters(e.getKey());

xsw.writeEndElement();

xsw.writeCharacters("\n");

}

xsw.writeEndElement();

xsw.writeCharacters("\n");

xsw.writeEndDocument();

xsw.close();

} catch (XMLStreamException | IOException ex) {

System.out.println(ex.getMessage());

}

}

// write to XML manually

void exportXMLManually(String fileName) {

try (BufferedWriter file = new BufferedWriter(

new OutputStreamWriter(

new FileOutputStream(fileName), "UTF8"))) {

// write the default XML declaration, comment and root element

file.write("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");

file.write("<!--This is a phone book-->\n");

file.write("<phones>\n");

// write all records as list of entry

for (Map.Entry<String, String> e : pb.entrySet())

file.write("\t<phone name=\"" + e.getValue() + "\">" +

e.getKey() + "</phone>\n");

file.write("</phones>\n");

} catch (IOException ex) {

System.out.println(ex.getMessage());

}

}

@Override

public String toString() {

return pb.toString();

}

}