1b: composite pattern

ueb05_news_example/src/client/Client.java

@@ -17,61 +17,8 @@ public class Client {
 				.addImage(new Image("Missing cat", 1280, 720, "anonymous")));
 		
 		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/model/Article.java

@@ -1,6 +1,6 @@
 package model;
 
-public class Article {
+public class Article extends Item {
 	private String title;
 	private String author;
 	private String content;
@@ -22,7 +22,21 @@ public class Article {
 		this.title = title;
 		this.author = author;
 	}
-	
+
+	public String getOverview(){
+		return "Article: " + getTitle() + ", Author: "
+				+ getAuthor();
+	}
+
+	public String getDetails(){
+		return "###" + getTitle() + "###"
+				+ "\n"
+				+ getContent()
+				+ "\n\n";
+	}
+
+	//=================================
+
 	/**
 	 * Get the title of the article.
 	 * @return title

ueb05_news_example/src/model/Image.java

@@ -1,66 +1,88 @@
 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 Item {
+    private String title;
+    private String author;
+    private int width;
+    private 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 > ^ < ";
-	}
+    /**
+     * 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;
+    }
+
+    public String getOverview() {
+        return "Image: " + getTitle()
+                + ", Resolution: " + getWidth()
+                + "x" + getHeight()
+                + ", Author: " + getAuthor();
+    }
+
+    public String getDetails(){
+        return "###" + getTitle() + "###"
+                + "\n"
+                + getContent()
+                + "\n\n";
+    }
+
+    //=================================
+
+    /**
+     * 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;
+    }
+
+    /**
+     * 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 getContent() {
+        /*
+         *  Dummy implementation
+         */
+        return " /\\_/\\ \n( o.o )\n > ^ < ";
+    }
 }

ueb05_news_example/src/model/Item.java

@@ -0,0 +1,6 @@
+package model;
+
+public abstract class Item {
+    public abstract String getOverview();
+    public abstract String getDetails();
+}

ueb05_news_example/src/model/NewsCollection.java

@@ -3,7 +3,7 @@ package model;
 import java.util.LinkedList;
 import java.util.List;
 
-public class NewsCollection {
+public class NewsCollection extends Item {
 	
 	private String topic;
 	private List<Article> articles = new LinkedList<Article>();
@@ -13,7 +13,52 @@ public class NewsCollection {
 	public NewsCollection(String topic) {
 		this.topic = topic;
 	}
-	
+
+	/**
+	 * Gets overview information about all directly or transitively
+	 * referenced items in the given collection.
+	 */
+	public String getOverview(){
+		StringBuilder builder = new StringBuilder();
+		builder.append("###" + getTopic() + "###");
+		builder.append("\n");
+		for (Article article : getArticles()) {
+			builder.append(article.getOverview());
+			builder.append("\n");
+		}
+		for (Image image : getImages()) {
+			builder.append(image.getOverview());
+			builder.append("\n");
+		}
+		for (NewsCollection collection : getCollections()) {
+			builder.append(collection.getOverview());
+			builder.append("\n");
+		}
+		return builder.toString();
+	}
+
+	/**
+	 * Gets the contents of all directly or transitively referenced items in
+	 * the given collection.
+	 */
+	public String getDetails(){
+		StringBuilder builder = new StringBuilder();
+		builder.append("###" + getTopic() + "###");
+		builder.append("\n");
+		for (Article article : getArticles()) {
+			builder.append(article.getDetails());
+		}
+		for (Image image : getImages()) {
+			builder.append(image.getDetails());
+		}
+		for (NewsCollection collection : getCollections()) {
+			builder.append(collection.getDetails());
+		}
+		return builder.toString();
+	}
+
+	//=================================
+
 	/**
 	 * Get the topic of the collection.
 	 * @return