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FileManager.java
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FileManager.java
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package bookstoreapp;
/**
*
* @author vguru
*/
import java.nio.file.*;
import java.nio.charset.Charset;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;
public class FileManager {
public static void write(ArrayList<Object> items, String type) throws IOException {
Path path = Paths.get(type + ".txt");
List<String> details = items.stream().map(item -> item.toString()).collect(Collectors.toList());
Files.write(path, details, Charset.defaultCharset());
}
public static ArrayList read(String type) throws IOException {
Path path = Paths.get(type + ".txt");
if (type == "books") {
List<String> text = Files.lines(path).collect(Collectors.toList());
ArrayList<Book> books = new ArrayList<>();
for (String s : text) {
String[] d = s.split(" ");
books.add(new Book(d[0], Double.parseDouble(d[1])));
}
return books;
}
else {
List<String> text = Files.lines(path).collect(Collectors.toList());
ArrayList<Customer> customers = new ArrayList<>();
for (String s : text) {
String[] d = s.split(" ");
customers.add(new Customer(d[0], d[1], Integer.parseInt(d[2])));
}
return customers;
}
}
}