import news example

ueb07_news_example/src/client/Client.java

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+package client;
+
+import model.Article;
+import model.Image;
+import model.NewsCollection;
+
+public class Client {
+	
+	public static void main(String[] args) {
+		NewsCollection masterCollection = new NewsCollection("Daily news");
+
+		Article changedArticle = new Article("Harder, Better, Faster, Stronger. Doping controls loosened","ups");
+
+		masterCollection.addItem(new NewsCollection("Sports")
+				.addItem(changedArticle)
+				.addItem(new Image("Athletic cat contest", 800, 600, "zdf")))
+		.addItem(new NewsCollection("Local news")
+				.addItem(new Article("Missing Cat missed.", "mfg"))
+				.addItem(new Article("Corrupted local politician selling cats.", "ard"))
+				.addItem(new Image("Missing cat", 1280, 720, "anonymous")));
+
+		System.out.println("\n===List===\n");
+		System.out.print(masterCollection.getOverviewInformation());
+		System.out.println("\n===Contents===\n");
+		System.out.print(masterCollection.getDetailedInformation());
+		System.out.println("\n===After change===\n");
+
+		changedArticle.setTitle("Harder, Better, Faster, Stronger? Doping controls loosened");
+		masterCollection.addItem(new Image("A tasty cat", 640, 480, "alf"));
+	}
+}

ueb07_news_example/src/model/Article.java

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+package model;
+
+public class Article extends NewsItem {
+	private String author;
+	private String content;
+	
+	// Fill in dummy content
+	{
+		content = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, "
+				+ "sed diam nonumy eirmod tempor invidunt ut labore et dolore "
+				+ "magna aliquyam erat, sed diam voluptua.";
+	}
+	
+	/**
+	 * Creates an article with the given title and author.
+	 * @param title
+	 * @param author
+	 */
+	public Article(String title, String author) {
+		this.title = title;
+		this.author = author;
+	}
+	
+	/**
+	 * 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;
+	}
+
+	@Override
+	public String getOverviewInformation() {
+		return "Article: " + this.getTitle() + ", Author: " + this.getAuthor();
+	}
+
+	@Override
+	public String getDetailedInformation() {
+		StringBuilder builder = new StringBuilder();
+		builder.append("###" + this.getTitle() + "###");
+		builder.append("\n");
+		builder.append(this.getContent());
+		builder.append("\n");
+		return builder.toString();
+	}
+}

ueb07_news_example/src/model/Image.java

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+package model;
+
+public class Image extends NewsItem {
+	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 author of the image.
+	 * @return author
+	 */
+	public String getAuthor() {
+		return author;
+	}
+	
+	/**
+	 * 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;
+	}
+		
+	/**
+	 * 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 > ^ < ";
+	}
+
+	/**
+	 * Print a list showing information about all directly or transitively
+	 * referenced items in the given collection.
+	 */
+	@Override
+	public String getOverviewInformation() {
+		return "Image: " + this.getTitle()
+					+ ", Resolution: " + this.getWidth() 
+					+ "x" + this.getHeight() 
+					+ ", Author: " + this.getAuthor();
+	}
+
+	@Override
+	public String getDetailedInformation() {
+		StringBuilder builder = new StringBuilder();
+		builder.append("###" + this.getTitle() + "###");
+		builder.append("\n");
+		builder.append(renderToString());
+		builder.append("\n");
+		return builder.toString();
+	}
+}

ueb07_news_example/src/model/NewsCollection.java

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+package model;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class NewsCollection extends NewsItem {
+	
+	private List<NewsItem> newsItems = new LinkedList<NewsItem>();
+			
+	public NewsCollection(String topic) {
+		this.title = topic;
+	}
+	
+	/**
+	 * Get the list of items stored in this collection.
+	 * @return items stored in this collection
+	 */
+	public List<NewsItem> getNewsItems() {
+		return newsItems;
+	}
+	
+	/**
+	 * Store another item to this collection.
+	 * @param item
+	 * @return this collection (enables method chaining)
+	 */
+	public NewsCollection addItem(NewsItem item) {
+		newsItems.add(item);
+		return this;
+	}
+	
+	/**
+	 * Print a list showing information about all directly or transitively
+	 * referenced items in the given collection.
+	 */
+	public String getOverviewInformation() {
+		StringBuilder builder = new StringBuilder();
+		builder.append("###" + this.getTitle() + "###");
+		builder.append("\n");
+		for (NewsItem item : this.getNewsItems()) {
+			builder.append(item.getOverviewInformation());
+			builder.append("\n");
+		}
+		return builder.toString();
+	}
+
+	@Override
+	public String getDetailedInformation() {
+		StringBuilder builder = new StringBuilder();
+		builder.append("###" + this.getTitle() + "###");
+		builder.append("\n");
+		for (NewsItem item : this.getNewsItems()) {
+			builder.append(item.getDetailedInformation());
+			builder.append("\n");
+		}
+		return builder.toString();
+	}	
+}

ueb07_news_example/src/model/NewsItem.java

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+package model;
+
+public abstract class NewsItem {
+
+	protected String title;
+
+	public NewsItem() {
+		super();
+	}
+
+	/**
+	 * Get the topic of the collection.
+	 * @return
+	 */
+	public String getTitle() {
+		return title;
+	}
+	
+	public void setTitle(String newTitle) {
+		title = newTitle;
+	}
+
+	/**
+	 * Get overview information about the news item.
+	 */
+	public abstract String getOverviewInformation();
+
+	/**
+	 * Get the contents of the news item.
+	 */	
+	public abstract String getDetailedInformation();
+}