Added pdf

ueb05_news_example/.gitignore

@@ -0,0 +1,2 @@
+/out/
+/.idea/

ueb05_news_example/src/client/Client.java

@@ -1,5 +1,6 @@
 package client;
 
+import decorator.FrameDecorator;
 import model.Article;
 import model.Image;
 import model.NewsCollection;
@@ -7,71 +8,22 @@ import model.NewsCollection;
 public class Client {
 	
 	public static void main(String[] args) {
+		FrameDecorator framedCat1 = new FrameDecorator(new Image("Athletic cat contest", 800, 600, "zdf"));
+		FrameDecorator framedCat2 = new FrameDecorator(new Article("Missing Cat missed.", "mfg"));
+		FrameDecorator framedCat3 = new FrameDecorator(new Image("Missing cat", 1280, 720, "anonymous"));
+
 		NewsCollection masterCollection = new NewsCollection("Daily news");
-		masterCollection.addCollection(new NewsCollection("Sports")
-				.addArticle(new Article("Harder, Better, Faster, Stronger. Doping controls loosened","ups"))
-				.addImage(new Image("Athletic cat contest", 800, 600, "zdf")))
-		.addCollection(new NewsCollection("Local news")
-				.addArticle(new Article("Missing Cat missed.", "mfg"))
-				.addArticle(new Article("Corrupted local politician selling cats.", "ard"))
-				.addImage(new Image("Missing cat", 1280, 720, "anonymous")));
+		masterCollection.addItem(new NewsCollection("Sports")
+				.addItem(new Article("Harder, Better, Faster, Stronger. Doping controls loosened","ups"))
+				.addItem(framedCat1))
+		.addItem(new NewsCollection("Local news")
+				.addItem(framedCat2)
+				.addItem(new Article("Corrupted local politician selling cats.", "ard"))
+				.addItem(framedCat3));
 		
 		System.out.println("\n===List===\n");
-		System.out.print(getOverviewInformation(masterCollection));
+		System.out.print(masterCollection.getOverview());
 		System.out.println("\n===Contents===\n");
-		System.out.print(getDetailedInformation(masterCollection));
+		System.out.print(masterCollection.getDetails());
 	}
-	
-	/**
-	 * Gets overview information about all directly or transitively
-	 * referenced items in the given collection.
-	 */	
-	public static String getOverviewInformation(NewsCollection rootCollection) {
-		StringBuilder builder = new StringBuilder();
-		builder.append("###" + rootCollection.getTopic() + "###");
-		builder.append("\n");
-		for (Article article : rootCollection.getArticles()) {
-			builder.append("Article: " + article.getTitle() + ", Author: "
-					+ article.getAuthor());
-			builder.append("\n");
-		}
-		for (Image image : rootCollection.getImages()) {
-			builder.append("Image: " + image.getTitle()
-					+ ", Resolution: " + image.getWidth() 
-					+ "x" + image.getHeight() 
-					+ ", Author: " + image.getAuthor());
-			builder.append("\n");
-		}
-		for (NewsCollection collection : rootCollection.getCollections()) {
-			builder.append(getOverviewInformation(collection));
-			builder.append("\n");
-		}
-		return builder.toString();
-	}
-	
-	/**
-	 * Gets the contents of all directly or transitively referenced items in
-	 * the given collection.
-	 */	
-	public static String getDetailedInformation(NewsCollection rootCollection) {
-		StringBuilder builder = new StringBuilder();
-		builder.append("###" + rootCollection.getTopic() + "###");
-		builder.append("\n");
-		for (Article article : rootCollection.getArticles()) {
-			builder.append("###" + article.getTitle() + "###");
-			builder.append("\n");
-			builder.append(article.getContent());
-			builder.append("\n\n");
-		}
-		for (Image image : rootCollection.getImages()) {
-			builder.append("###" + image.getTitle() + "###");
-			builder.append("\n");
-			builder.append(image.renderToString());
-			builder.append("\n\n");
-		}
-		for (NewsCollection collection : rootCollection.getCollections()) {
-			builder.append(getDetailedInformation(collection));
-		}
-		return builder.toString();
-	}	
 }

ueb05_news_example/src/decorator/FrameDecorator.java

@@ -0,0 +1,43 @@
+package decorator;
+
+import model.Item;
+
+import java.util.Arrays;
+
+public class FrameDecorator extends StringDecorator {
+    public FrameDecorator(Item item) {
+        super(item);
+    }
+
+    public String getOverview() {
+        return wrapWithFrame(wrappee.getOverview());
+    }
+
+    public String getDetails() {
+        return wrapWithFrame(wrappee.getDetails());
+    }
+
+    public String getTitle() {
+        return wrapWithFrame(wrappee.getTitle());
+    }
+
+    private String wrapWithFrame(String content) {
+        String[] lines = content.split("\n");
+        int maxLength = Arrays.stream(lines).map(String::length).reduce(Integer::max).orElse(0);
+        StringBuilder builder = new StringBuilder();
+        builder.append("-".repeat(maxLength + 2)).append("\n");
+        for (String line : lines) {
+            int spaces = maxLength - line.length();
+            int leadingSpaces = spaces / 2;
+            int trailingSpaces = spaces - leadingSpaces;
+
+            builder.append("|")
+                    .append(" ".repeat(leadingSpaces))
+                    .append(line)
+                    .append(" ".repeat(trailingSpaces))
+                    .append("|\n");
+        }
+        builder.append("-".repeat(maxLength + 2)).append("\n");
+        return builder.toString();
+    }
+}

ueb05_news_example/src/decorator/StringDecorator.java

@@ -0,0 +1,23 @@
+package decorator;
+
+import model.Item;
+
+public abstract class StringDecorator extends Item {
+    protected Item wrappee;
+
+    public StringDecorator(Item item) {
+        this.wrappee = item;
+    }
+
+    public String getOverview() {
+        return wrappee.getOverview();
+    }
+
+    public String getDetails() {
+        return wrappee.getDetails();
+    }
+
+    public String getTitle() {
+        return wrappee.getTitle();
+    }
+}

ueb05_news_example/src/model/Article.java

@@ -1,10 +1,6 @@
 package model;
 
-public class Article {
-	private String title;
-	private String author;
-	private String content;
-	
+public class Article extends AuthoredItem {
 	// Fill in dummy content
 	{
 		content = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, "
@@ -15,35 +11,16 @@ public class Article {
 	
 	/**
 	 * Creates an article with the given title and author.
-	 * @param title
-	 * @param author
+	 * @param title title of article
+	 * @param author author of article
 	 */
 	public Article(String title, String author) {
 		this.title = title;
 		this.author = author;
 	}
-	
-	/**
-	 * Get the title of the article.
-	 * @return title
-	 */
-	public String getTitle() {
-		return title;
-	}
-	
-	/**
-	 * Get the author of the article.
-	 * @return author
-	 */
-	public String getAuthor() {
-		return author;
-	}
-	
-	/**
-	 * Get the content of the article.
-	 * @return
-	 */
-	public String getContent() {
-		return content;
+
+	public String getOverview(){
+		return "Article: " + getTitle() + ", Author: "
+				+ getAuthor();
 	}
 }

ueb05_news_example/src/model/AuthoredItem.java

@@ -0,0 +1,31 @@
+package model;
+
+public abstract class AuthoredItem extends Item{
+    protected String author;
+    protected String content;
+
+    public String getDetails(){
+        return "###" + getTitle() + "###"
+                + "\n"
+                + getContent()
+                + "\n\n";
+    }
+
+    /**
+     * Get the author of the AuthoredItem.
+     *
+     * @return author
+     */
+    public String getAuthor() {
+        return author;
+    }
+
+    /**
+     * Get the content of the AuthoredItem.
+     *
+     * @return content
+     */
+    public String getContent() {
+        return content;
+    }
+}

ueb05_news_example/src/model/Image.java

@@ -1,66 +1,54 @@
 package model;
 
-public class Image {
-	private String title;
-	private String author;
-	private int width;
-	private int height;
-	
-	/**
-	 * Creates an image with the given title and author and a resolution 
-	 * defined by width and height. 
-	 * @param title
-	 * @param width
-	 * @param height
-	 * @param author
-	 */
-	public Image(String title, int width, int height, String author) {
-		this.title = title;
-		this.width = width;
-		this.height = height;
-		this.author = author;
-	}
-	
-	/**
-	 * Get the title of the image.
-	 * @return title
-	 */
-	public String getTitle() {
-		return title;
-	}
-	
-	/**
-	 * Get the author of the image.
-	 * @return author
-	 */
-	public String getAuthor() {
-		return author;
-	}
-	
-	/**
-	 * Get the width of the image.
-	 * @return width
-	 */
-	public int getWidth() {
-		return width;
-	}
+public class Image extends AuthoredItem {
+    private final int width;
+    private final int height;
 
-	/**
-	 * Get the height of the image.
-	 * @return height
-	 */
-	public int getHeight() {
-		return height;
-	}
-		
-	/**
-	 * Renders the image as String and return the rendered image.
-	 * @return String representing the rendered image
-	 */
-	public String renderToString() {
-		/*
-		 *  Dummy implementation
-		 */
-		return " /\\_/\\ \n( o.o )\n > ^ < ";
-	}
+    // Fill in dummy content
+    {
+        content = " /\\_/\\ \n( o.o )\n > ^ < ";
+    }
+
+    /**
+     * Creates an image with the given title and author and a resolution
+     * defined by width and height.
+     *
+     * @param title title of image
+     * @param width width of image
+     * @param height height of image
+     * @param author author of image
+     */
+    public Image(String title, int width, int height, String author) {
+        this.title = title;
+        this.width = width;
+        this.height = height;
+        this.author = author;
+    }
+
+    public String getOverview() {
+        return "Image: " + getTitle()
+                + ", Resolution: " + getWidth()
+                + "x" + getHeight()
+                + ", Author: " + getAuthor();
+    }
+
+    //=================================
+
+    /**
+     * Get the width of the image.
+     *
+     * @return width
+     */
+    public int getWidth() {
+        return width;
+    }
+
+    /**
+     * Get the height of the image.
+     *
+     * @return height
+     */
+    public int getHeight() {
+        return height;
+    }
 }

ueb05_news_example/src/model/Item.java

@@ -0,0 +1,17 @@
+package model;
+
+public abstract class Item {
+    protected String title;
+
+    public abstract String getOverview();
+    public abstract String getDetails();
+
+    /**
+     * Get the title of the item.
+     *
+     * @return title
+     */
+    public String getTitle() {
+        return title;
+    }
+}

ueb05_news_example/src/model/NewsCollection.java

@@ -3,75 +3,63 @@ package model;
 import java.util.LinkedList;
 import java.util.List;
 
-public class NewsCollection {
-	
-	private String topic;
-	private List<Article> articles = new LinkedList<Article>();
-	private List<Image> images = new LinkedList<Image>();
-	private List<NewsCollection> collections = new LinkedList<NewsCollection>();
-		
-	public NewsCollection(String topic) {
-		this.topic = topic;
+public class NewsCollection extends Item {
+
+	private final List<Item> items = new LinkedList<>();
+
+	public NewsCollection(String title) {
+		this.title = title;
 	}
-	
+
 	/**
-	 * Get the topic of the collection.
-	 * @return
+	 * Gets overview information about all directly or transitively
+	 * referenced items in the given collection.
 	 */
-	public String getTopic() {
-		return topic;
+	public String getOverview(){
+		StringBuilder builder = new StringBuilder();
+		builder
+                .append("###").append(getTitle()).append("###")
+				.append("\n");
+		for(Item item : getItems()){
+			builder
+					.append(item.getOverview())
+				    .append("\n");
+		}
+		return builder.toString();
 	}
+
 	/**
-	 * Get the list of articles stored directly in this collection.
-	 * @return articles stored in this collection
+	 * Gets the contents of all directly or transitively referenced items in
+	 * the given collection.
 	 */
-	public List<Article> getArticles() {
-		return articles;
+	public String getDetails(){
+		StringBuilder builder = new StringBuilder();
+		builder
+                .append("###").append(getTitle()).append("###")
+				.append("\n");
+		for (Item item : getItems()) {
+			builder.append(item.getDetails());
+		}
+		return builder.toString();
+	}
+
+	//=================================
+
+	/**
+	 * Get the list of items stored directly in this collection.
+	 * @return items stored in this collection
+	 */
+	public List<Item> getItems() {
+		return items;
 	}
 	
 	/**
-	 * Get the list of images stored directly in this collection.
-	 * @return images stored in this collection
-	 */
-	public List<Image> getImages() {
-		return images;
-	}
-	
-	/**
-	 * Get the list of collections stored directly in this collection.
-	 * @return collections stored in this collection
-	 */
-	public List<NewsCollection> getCollections() {
-		return collections;
-	}
-	
-	/**
-	 * Store an article directly in this collection.
-	 * @param article
+	 * Store an item directly in this collection.
+	 * @param item to add
 	 * @return this collection (enables method chaining)
 	 */
-	public NewsCollection addArticle(Article article) {
-		articles.add(article);
-		return this;
-	}
-	
-	/**
-	 * Store an image directly in this collection.
-	 * @param image
-	 * @return this collection (enables method chaining)
-	 */
-	public NewsCollection addImage(Image image) {
-		images.add(image);
-		return this;
-	}
-		
-	/**
-	 * Store another collection directly in this collection.
-	 * @param collection
-	 * @return this collection (enables method chaining)
-	 */
-	public NewsCollection addCollection(NewsCollection collection) {
-		collections.add(collection);
+	public NewsCollection addItem(Item item) {
+		items.add(item);
 		return this;
 	}
 }

ueb05_news_example/ueb05_news_example.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>