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feat: implemented librarian, Magazine,Newspaper,Exceptions
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‎lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/jadaslibrary/Book.java

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package com.codedifferently.lesson10.jadaslibrary;
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import com.codedifferently.lesson10.jadaslibrary.exceptions.WrongLibraryException;
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import java.util.List;
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import java.util.Objects;
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public class Book extends MediaItem {
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private String isbn;
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private List<String> authors;
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private int numberOfPages;
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private Jadaslibrary library;
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private Patron patron;
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private String author;
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// Constructor
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public Book(String title, String isbn, List<String> authors, int numberOfPages) {
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super(title, isbn, numberOfPages);
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this.isbn = isbn;
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this.authors = authors;
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this.numberOfPages = numberOfPages;
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this.author = author;
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}
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// Set the library for the book
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public void setLibrary(Jadaslibrary library) {
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if (library != null && !library.hasBook(this)) {
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throw new WrongLibraryException("Book " + isbn + " is not in the provided library");
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}
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this.library = library;
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}
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// Getters and setters
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public String getIsbn() {
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return isbn;
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}
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public List<String> getAuthors() {
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return authors;
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}
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public String getAuthor() {
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return author;
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}
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public void setAuthors(List<String> authors) {
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this.authors = authors;
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}
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public int getNumberOfPages() {
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return numberOfPages;
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}
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public Jadaslibrary getLibrary() {
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return library;
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}
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public String getId() {
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return isbn;
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}
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public Patron getPatron() {
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return patron;
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}
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public void setPatron(Patron patron) {
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this.patron = patron;
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}
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// Overridden methods
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (!(o instanceof Book)) return false;
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Book book = (Book) o;
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return Objects.equals(getIsbn(), book.getIsbn());
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}
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@Override
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public int hashCode() {
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return Objects.hash(getId());
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}
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@Override
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public String toString() {
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return "Book{" + "id='" + getId() + '\'' + ", title='" + getTitle() + '\'' + '}';
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}
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}

‎lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/jadaslibrary/Dvd.java

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package com.codedifferently.lesson10.jadaslibrary;
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public class Dvd extends MediaItem {
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private String director;
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private int releaseYear;
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private boolean checkedOut;
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private Patron patron;
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public Dvd(String title, String director, int releaseYear) {
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super(title, "N/A", 0);
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this.director = director;
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this.releaseYear = releaseYear;
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this.patron = null;
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}
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// Getters and setters
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public String getDirector() {
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return director;
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}
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public void setDirector(String director) {
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this.director = director;
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}
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public int getReleaseYear() {
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return releaseYear;
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}
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public void setReleaseYear(int releaseYear) {
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this.releaseYear = releaseYear;
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}
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public String getId() {
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return getTitle();
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}
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@Override
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public Patron getPatron() {
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return patron;
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}
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@Override
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public void setPatron(Patron patron) {
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this.patron = patron;
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}
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@Override
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public boolean isCheckedOut() {
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return checkedOut;
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}
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@Override
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public void setCheckedOut(boolean checkedOut) {
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this.checkedOut = checkedOut;
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}
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@Override
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public String toString() {
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return "DVD{"
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+ "title='"
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+ getTitle()
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+ '\''
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+ ", director='"
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+ director
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+ '\''
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+ ", releaseYear="
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+ releaseYear
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+ ", patron="
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+ (patron != null ? patron.getName() : "None")
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+ '}';
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}
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}

‎lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/jadaslibrary/Jadaslibrary.java

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package com.codedifferently.lesson10.jadaslibrary;
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import java.util.ArrayList;
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import java.util.List;
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public class Jadaslibrary {
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private String id;
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private List<Book> books;
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private List<Patron> patrons;
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private List<MediaItem> mediaItems;
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private List<Librarian> librarians;
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public static final int MAX_CHECKED_OUT_MEDIA_ITEMS = 3;
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public Jadaslibrary(String id) {
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this.id = id;
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this.books = new ArrayList<>();
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this.patrons = new ArrayList<>();
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this.mediaItems = new ArrayList<>();
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this.librarians = new ArrayList<>();
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}
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public void addBook(Book book) {
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books.add(book);
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}
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public void removeBook(Book book) {
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books.remove(book);
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}
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public void addMediaItem(MediaItem mediaItem) {
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mediaItems.add(mediaItem);
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if (mediaItem instanceof Book) {
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books.add((Book) mediaItem);
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}
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}
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public void removeMediaItem(MediaItem mediaItem) {
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mediaItems.remove(mediaItem);
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if (mediaItem instanceof Book) {
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books.remove(mediaItem);
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}
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}
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public void registerPatron(Patron patron) {
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patrons.add(patron);
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}
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public void registerLibrarian(Librarian librarian) {
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librarians.add(librarian);
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}
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public void checkOutMediaItem(MediaItem mediaItem, Patron patron) {
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if (!mediaItem.isCheckedOut()
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&& patron.getCheckedOutMediaItems().size() < MAX_CHECKED_OUT_MEDIA_ITEMS) {
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mediaItem.setCheckedOut(true);
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mediaItem.setPatron(patron);
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}
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}
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public void returnMediaItem(MediaItem mediaItem) {
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if (mediaItem.isCheckedOut()) {
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mediaItem.setCheckedOut(false);
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mediaItem.setPatron(null);
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}
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}
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public List<Book> getBooks() {
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return new ArrayList<>(books);
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}
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public List<MediaItem> getMediaItems() {
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return new ArrayList<>(mediaItems);
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}
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public List<Patron> getPatrons() {
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return new ArrayList<>(patrons);
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}
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public void addPatron(Patron patron) {
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patrons.add(patron);
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}
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public boolean hasBook(Book book) {
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return books.contains(book);
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}
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public boolean hasPatron(Patron patron) {
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return patrons.contains(patron);
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}
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public String getId() {
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return id;
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}
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public List<Book> getCheckedOutBooksByPatron(Patron patron) {
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List<Book> checkedOutBooks = new ArrayList<>();
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for (Book book : books) {
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if (book.isCheckedOut() && book.getPatron().equals(patron)) {
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checkedOutBooks.add(book);
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}
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}
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return checkedOutBooks;
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}
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public List<MediaItem> getCheckedOutMediaItemsByPatron(Patron patron) {
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List<MediaItem> checkedOutMediaItems = new ArrayList<>();
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for (MediaItem mediaItem : mediaItems) {
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if (mediaItem.isCheckedOut() && mediaItem.getPatron().equals(patron)) {
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checkedOutMediaItems.add(mediaItem);
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}
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}
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return checkedOutMediaItems;
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}
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public boolean isCheckedOut(Book book) {
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return getCheckedOutBooks().contains(book);
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}
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private List<Book> getCheckedOutBooks() {
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List<Book> checkedOutBooks = new ArrayList<>();
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for (Book book : books) {
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if (book.isCheckedOut()) {
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checkedOutBooks.add(book);
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}
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}
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return checkedOutBooks;
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}
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public void removePatron(Patron patron) {
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patrons.remove(patron);
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}
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public void checkOutBook(Book book, Patron patron) {
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if (books.contains(book) && patrons.contains(patron)) {
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book.setCheckedOut(true);
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book.setPatron(patron);
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}
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}
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}

‎lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/jadaslibrary/Librarian.java

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package com.codedifferently.lesson10.jadaslibrary;
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public class Librarian {
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private String name;
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public Librarian(String name) {
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this.name = name;
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}
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public String getName() {
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return name;
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}
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public void addBookToLibrary(Book book, Jadaslibrary library) {
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library.addBook(book);
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}
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public void removeBookFromLibrary(Book book, Jadaslibrary library) {
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library.removeBook(book);
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}
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}

‎lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/jadaslibrary/Magazine.java

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package com.codedifferently.lesson10.jadaslibrary;
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public class Magazine extends MediaItem {
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private String title;
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private String publisher;
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private int issueNumber;
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public Magazine(String title, String isbn, String publisher, int numberOfPages, int issueNumber) {
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super(title, isbn, numberOfPages);
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this.title = title;
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this.publisher = publisher;
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this.issueNumber = issueNumber;
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}
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// Getters and setters
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public String getTitle() {
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return title;
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}
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public void setTitle(String title) {
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this.title = title;
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}
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public String getPublisher() {
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return publisher;
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}
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public void setPublisher(String publisher) {
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this.publisher = publisher;
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}
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public int getIssueNumber() {
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return issueNumber;
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}
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public void setIssueNumber(int issueNumber) {
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this.issueNumber = issueNumber;
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}
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}

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