Axel Hansson

src/main/java/com/booleanuk/core/Article.java

@@ -1,35 +1,11 @@
 package com.booleanuk.core;
 
-public class Article {
-    String title;
+public class Article extends Item {
 
-    boolean onLoan = false;
+    public Article(String title, Author author) {
 
-    public Article(String title) {
-        this.title = title;
-    }
-
-    public boolean isOnLoan() {
-        return onLoan;
-    }
-
-    public String checkIn() {
-        if (!this.isOnLoan()) {
-            return "item is not currently on loan";
-        }
+        super(title, author);
 
-        this.onLoan = false;
-
-        return "item has been checked in";
     }
 
-    public String checkOut() {
-        if (this.isOnLoan()) {
-            return "item is currently on loan";
-        }
-
-        this.onLoan = true;
-
-        return "item has been checked out";
-    }
 }

src/main/java/com/booleanuk/core/Author.java

@@ -0,0 +1,25 @@
+package com.booleanuk.core;
+
+public class Author {
+    private String name;
+    private String eMail;
+    private String website;
+
+    public Author(String name, String eMail, String website) {
+        this.name = name;
+        this.eMail = eMail;
+        this.website = website;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String geteMail() {
+        return eMail;
+    }
+
+    public String getWebsite() {
+        return website;
+    }
+}

src/main/java/com/booleanuk/core/Book.java

@@ -1,35 +1,9 @@
 package com.booleanuk.core;
 
-public class Book {
-    String title;
+public class Book extends Item{
 
-    boolean onLoan = false;
-
-    public Book(String title) {
-        this.title = title;
-    }
-
-    public boolean isOnLoan() {
-        return onLoan;
-    }
-
-    public String checkIn() {
-        if (!this.isOnLoan()) {
-            return "item is not currently on loan";
-        }
-
-        this.onLoan = false;
-
-        return "item has been checked in";
+    public Book(String title, Author author) {
+        super(title, author);
     }
 
-    public String checkOut() {
-        if (this.isOnLoan()) {
-            return "item is currently on loan";
-        }
-
-        this.onLoan = true;
-
-        return "item has been checked out";
-    }
 }

src/main/java/com/booleanuk/core/Item.java

@@ -0,0 +1,48 @@
+package com.booleanuk.core;
+
+public abstract class Item {
+    private Author author;
+    private String title;
+    private boolean onLoan;
+
+    public Item(String title) {
+        this.title = title;
+        this.onLoan = false;
+    }
+
+    public Item(String title, Author author) {
+        this(title);
+        this.author = author;
+    }
+
+    private boolean isOnLoan() {
+        return this.onLoan;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+    public String checkIn() {
+        if (!this.isOnLoan()) {
+            return "item is not currently on loan";
+        }
+
+        this.onLoan = false;
+
+        return "item has been checked in";
+    }
+
+    public String checkOut() {
+        if (this.isOnLoan()) {
+            return "item is currently on loan";
+        }
+
+        this.onLoan = true;
+
+        return "item has been checked out";
+    }
+
+    public String getAuthorInfo() {
+        return "Author: " + author.getName() + ", eMail: " + author.geteMail() + " and website: " + author.getWebsite();
+    }
+}

src/main/java/com/booleanuk/core/Library.java

@@ -1,29 +1,23 @@
 package com.booleanuk.core;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Library {
-    List<Article> articles;
-    List<Book> books;
-    List<Newspaper> newspapers;
+    List<Item> items;
 
-    public void addToStock(Article item) {
-        this.articles.add(item);
+    public Library(){
+        this.items = new ArrayList<>();
     }
-
-    public void addToStock(Book item) {
-        this.books.add(item);
-    }
-
-    public void addToStock(Newspaper item) {
-        this.newspapers.add(item);
+    public void addToStock(Item item) {
+        this.items.add(item);
     }
 
     // The following methods may contain code that you are unfamiliar with. The strange syntax of article -> something
     // is called a lambda expression (https://www.w3schools.com/java/java_lambda.asp)
-    public String checkInArticle(String title) {
-        List<Article> filtered = this.articles.stream()
-                .filter(article -> article.title.equals(title))
+    public String checkInItem(String title) {
+        List<Item> filtered = this.items.stream()
+                .filter(item -> item.getTitle().equals(title))
                 .toList();
 
         if (filtered.size() < 1) {
@@ -33,9 +27,9 @@ public String checkInArticle(String title) {
         return filtered.get(0).checkIn();
     }
 
-    public String checkOutArticle(String title) {
-        List<Article> filtered = this.articles.stream()
-                .filter(article -> article.title.equals(title))
+    public String checkOutItem(String title) {
+        List<Item> filtered = this.items.stream()
+                .filter(item -> item.getTitle().equals(title))
                 .toList();
 
         if (filtered.size() < 1) {
@@ -45,51 +39,15 @@ public String checkOutArticle(String title) {
         return filtered.get(0).checkOut();
     }
 
-    public String checkInBook(String title) {
-        List<Book> filtered = this.books.stream()
-                .filter(book -> book.title.equals(title))
-                .toList();
-
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkIn();
-    }
-
-    public String checkOutBook(String title) {
-        List<Book> filtered = this.books.stream()
-                .filter(book -> book.title.equals(title))
+    public String getInfoAboutAuthor(String title) {
+        List<Item> filtered = this.items.stream()
+                .filter(item -> item.getTitle().equals(title))
                 .toList();
 
         if (filtered.size() < 1) {
             return "item is not part of the library's collection";
         }
 
-        return filtered.get(0).checkOut();
-    }
-
-    public String checkInNewspaper(String title) {
-        List<Newspaper> filtered = this.newspapers.stream()
-                .filter(newspaper -> newspaper.title.equals(title))
-                .toList();
-
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkIn();
-    }
-
-    public String checkOutNewspaper(String title) {
-        List<Newspaper> filtered = this.newspapers.stream()
-                .filter(newspaper -> newspaper.title.equals(title))
-                .toList();
-
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkOut();
+        return filtered.get(0).getAuthorInfo();
     }
-}
+}

src/main/java/com/booleanuk/core/Newspaper.java

@@ -1,23 +1,21 @@
 package com.booleanuk.core;
 
-public class Newspaper {
-    String title;
-
-    boolean onLoan = false;
-
+public class Newspaper extends Item {
     public Newspaper(String title) {
-        this.title = title;
-    }
-
-    public boolean isOnLoan() {
-        return onLoan;
+        super(title);
     }
-
+    @Override
     public String checkIn() {
         return "newspapers are not available for loan";
     }
 
+    @Override
     public String checkOut() {
         return "newspapers are not available for loan";
     }
+
+    @Override
+    public String getAuthorInfo() {
+        return "The newspaper has multiple authors";
+    }
 }

src/test/java/com/booleanuk/core/ArticleTest.java

@@ -6,29 +6,33 @@
 class ArticleTest {
     @Test
     public void shouldCheckOutIfAvailable() {
-        Article article = new Article("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Article article = new Article("JUnit Rocks", JUnitauthor);
         Assertions.assertEquals("item has been checked out", article.checkOut());
     }
 
     @Test
     public void shouldDeclineIfNotAvailableToCheckout() {
-        Article article = new Article("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Article article = new Article("JUnit Rocks", JUnitauthor);
         article.checkOut();
 
         Assertions.assertEquals("item is currently on loan", article.checkOut());
     }
 
     @Test
     public void shouldCheckInIfOnLoan() {
-        Article article = new Article("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Article article = new Article("JUnit Rocks", JUnitauthor);
         article.checkOut();
 
         Assertions.assertEquals("item has been checked in", article.checkIn());
     }
 
     @Test
     public void shouldDeclineCheckInIfNotOnLoan() {
-        Article article = new Article("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Article article = new Article("JUnit Rocks", JUnitauthor);
 
         Assertions.assertEquals("item is not currently on loan", article.checkIn());
     }

src/test/java/com/booleanuk/core/BookTest.java

@@ -6,29 +6,33 @@
 public class BookTest {
     @Test
     public void shouldCheckOutIfAvailable() {
-        Book book = new Book("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Book book = new Book("JUnit Rocks", JUnitauthor);
         Assertions.assertEquals("item has been checked out", book.checkOut());
     }
 
     @Test
     public void shouldDeclineIfNotAvailableToCheckout() {
-        Book book = new Book("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Book book = new Book("JUnit Rocks", JUnitauthor);
         book.checkOut();
 
         Assertions.assertEquals("item is currently on loan", book.checkOut());
     }
 
     @Test
     public void shouldCheckInIfOnLoan() {
-        Book book = new Book("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Book book = new Book("JUnit Rocks", JUnitauthor);
         book.checkOut();
 
         Assertions.assertEquals("item has been checked in", book.checkIn());
     }
 
     @Test
     public void shouldDeclineCheckInIfNotOnLoan() {
-        Book book = new Book("JUnit Rocks");
+        Author JUnitauthor = new Author("Lars Hammar", "[email protected]", "www.larshammarexample.com");
+        Book book = new Book("JUnit Rocks", JUnitauthor);
 
         Assertions.assertEquals("item is not currently on loan", book.checkIn());
     }