implemented accept and visit

src/uebung08/doc/Image.java

@@ -14,9 +14,8 @@ public class Image implements TextComponent {
         return 0;
     }
 
+    // immer diese accept methode verwenden
     @Override
-    public <T> boolean accept(CountWordsVisitor<T> visitor) {
+    public <T> T accept(Visitor<T> visitor) { return visitor.visit(this); }
-        return visitor.visit(this);
-    }
 
 }

src/uebung08/doc/Paragraph.java

@@ -27,4 +27,7 @@ public class Paragraph implements TextComponent {
 
         return wordcount;
     }
+
+    @Override
+    public <T> T accept(Visitor<T> visitor) { return visitor.visit(this); }
 }

src/uebung08/doc/Section.java

@@ -20,4 +20,6 @@ public class Section implements TextComponent {
         return wordcount;
     }
 
+    @Override
+    public <T> T accept(Visitor<T> visitor) { return visitor.visit(this); }
 }

src/uebung08/doc/TextComponent.java

@@ -3,5 +3,5 @@ package uebung08.doc;
 public interface TextComponent {
     public int countWords();
 
-    public <T> boolean accept(Visitor<T> visitor);
+    public <T> T accept(Visitor<T> visitor);
 }

src/uebung08/doc/Visitor.java

@@ -2,4 +2,8 @@ package uebung08.doc;
 
 public interface Visitor<T> {
     T visit(TextComponent textComponent);
+    T visit(Book book);
+    T visit(Paragraph paragraph);
+    T visit(Image image);
+    T visit(Section section);
 }