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marife aquino
import java.util.*;
class Author{
public String name;
public BookList<Book>books=new BookList<Book>();
public Author(){
}
public boolean equals(Object node){
return name.equals(((Author)node).name);
}
public void display(){
System.out.println(name);
books.display();
}
}
class Book {
public String title;
public Patron patron=null;
public Book(){
}
public boolean equals(Object node){
return title.equals(((Book)node).title);
}
public String toString(){
return " *"+title+(patron !=null?" -checked out to " +patron.name:"")+ "\n";
}
}
class CheckedOutBook{
public Author author= null;
public Book book=null;
public CheckedOutBook(){
}
public boolean equals(Object node){
return book.title.equals(((CheckedOutBook)node).book.title)&& author.name.equals(((CheckedOutBook)node).author.name);
}
public String toString(){
return " *"+author.name+","+book.title+"\n";
}
}
class Patron {
public String name;
public BookList<CheckedOutBook>books=new BookList<CheckedOutBook>();
public Patron (){
}
public boolean equals(Object node){
return name.equals(((Patron)node).name);
}
public void display(){
if(!books.isEmpty()){
System.out.println(name + "has the following books:");
books.display();
}
else System.out.println(name+ "has no books ");
}
}
class AuthorList extends LinkedList<Author>{
static final long serialVersionUID=123;
public AuthorList(){
super();
}
public void display(){
Object[] authors=toArray();
for(int i=0;i<authors.length;i++)
((Author)authors[i]).display();
}
}
class BookList<T> extends LinkedList<T>{
static final long serialVersionUID=124;
public BookList(){
super();
}
public void display(){
for(int i = 0; i<size();i++)
System.out.println(get(i));
}
}
class PatronList extends LinkedList<Patron>{
static final long serialVersionUID=125;
public PatronList(){
super();
}
public void display(){
for(java.util.Iterator it = iterator();it.hasNext(););
}
}
class Library{
private ArrayList<AuthorList>
catalog= new ArrayList<AuthorList>('z'+1);
private ArrayList<PatronList>
people= new ArrayList<PatronList>('z'+1);
private String input;
Scanner kb= new Scanner(System.in);
public Library(){
for(int i =0; i<='z';i++){
catalog.add(i, new AuthorList());
people.add(i, new PatronList());
}
}
private String getString(String msg){
System.out.print(msg + " ");
System.out.flush();
input= kb.nextLine();
return input.substring(0,1).toUpperCase()+input.substring(1);
}
private void status(){
System.out.println("Library has the following books:\n ");
for(int i='A';i <='z';i++)
if (catalog.get(i).size()>0)
catalog.get(i).display();
}
private void includeBook(){
Author newAuthor= new Author();
int oldAuthor;
Book newBook= new Book();
newAuthor.name=getString("Enter Author's name: ");
newBook.title=getString("Enter the title of the book: ");
oldAuthor=catalog.get(newAuthor.name.charAt(0)).indexOf(newAuthor);
if(oldAuthor==-1){
newAuthor.books.add(newBook);
catalog.get(newAuthor.name.charAt(0)).add(newAuthor);
}
else( catalog.get(newAuthor.name.charAt(0)).get(oldAuthor)).
books.add(newBook);
}
private void checkedOutBook(){
Patron patron= new Patron(), patronRef;
Author author= new Author(), authorRef= new Author();
Book book= new Book();
int patronIndex, bookIndex= -1, authorIndex=-1;
patron.name=getString("Enter patron's names:");
while(authorIndex==-1){
author.name= getString("Enter author's name:");
authorIndex= catalog.get(author.name.charAt(0)).indexOf(author);
if(authorIndex==-1)
System.out.println("Misspelled author's name");
}
while(bookIndex==-1){
book.title=getString("Enter the title of the book: ");
authorRef=catalog.get(author.name.charAt(0)).get(authorIndex);
bookIndex=authorRef.books.indexOf(book);
if(bookIndex==-1)
System.out.println("Misspelled title:");
}
Book bookRef= authorRef.books.get(bookIndex);
CheckedOutBook bookToCheckOut=new CheckedOutBook();
bookToCheckOut.author=authorRef;
bookToCheckOut.book=bookRef;
patronIndex=people.get(patron.name.charAt(0)).indexOf(patron);
if(patronIndex==-1){
patron.books.add(bookToCheckOut);
people.get(patron.name.charAt(0)).add(patron);
bookRef.patron=people.get(patron.name.charAt(0)).getFirst();
}
else{
patronRef=people.get(patron.name.charAt(0)).get(patronIndex);
patronRef.books.add(bookToCheckOut);
bookRef.patron=patronRef;
}
}
private void returnBook(){
Patron patron=new Patron();
Book book= new Book();
Author author=new Author(),authorRef=new Author();
int patronIndex=-1 ,authorIndex=-1,bookIndex=-1;
while(patronIndex == -1){
patron.name=getString("Enter patron's name:");
patronIndex=people.get(patron.name.charAt(0)).indexOf(patron);
if(patronIndex==-1)
System.out.println("Patron's name misspelled");
}
while(authorIndex==-1){
author.name=getString("Enter author's name: ");
authorIndex=catalog.get(author.name.charAt(0)).indexOf(author);
if(authorIndex==-1)
System.out.println("Patron's name misspelled");
}
while(bookIndex==-1){
book.title=getString("Enter the title of the book: ");
authorRef=catalog.get(author.name.charAt(0)).get(authorIndex);
bookIndex=authorRef.books.indexOf(book);
if(bookIndex==-1)
System.out.println("Misspelled title:");
}
CheckedOutBook checkedOutBook=new CheckedOutBook();
checkedOutBook.author=authorRef;
checkedOutBook.book=authorRef.books.get(bookIndex);
(authorRef.books.get(bookIndex)).patron=null;
(people.get(patron.name.charAt(0)).get(patronIndex)).
books.remove(checkedOutBook);
}
public void run(){
while(true){
char option=getString("\nEnter one of the following options:\n"+"1. Include a book in the catalog\n"+"2. Check Out a Book\n"+"3. Return a Book\n"+"4. Status\n"+"5. Exit\n"+"Your Option:").charAt(0);
switch(option){
case'1': includeBook(); break;
case'2': checkedOutBook(); break;
case'3': returnBook(); break;
case'4': status(); break;
case'5': return;
default: System.out.println("Wrong option, try again");
}
}
}
public static void main(String[]args){
(new Library()).run();
}
}
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