Composite Pattern

design-pattern/src/Composite/Component.java

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+package Composite;
+
+abstract public class Component {
+
+    private String name;
+
+    public Component(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

design-pattern/src/Composite/Composite

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+Composite Pattern
+ - 컨테이너와 내용물을 같게 다루기
+ - Composite 패턴을 통해서 트리구조 구현

design-pattern/src/Composite/File.java

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+package Composite;
+
+public class File extends Component{
+
+    private Object data;
+
+    public File(String name) {
+        super(name);
+    }
+
+    public Object getData() {
+        return data;
+    }
+
+    public void setData(Object data) {
+        this.data = data;
+    }
+}

design-pattern/src/Composite/Folder.java

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+package Composite;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Folder extends Component {
+
+    List<Component> children = new ArrayList<>();
+
+    public Folder(String name) {
+        super(name);
+    }
+
+    public boolean addComponent(Component component) {
+        return children.add(component);
+    }
+
+    public boolean removeComponent(Component component){
+         return children.remove(component);
+    }
+
+    public List<Component> getChildren() {
+        return children;
+    }
+}

design-pattern/src/Composite/Main.java

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+package Composite;
+
+public class Main {
+    public static void main(String[] args) {
+        Folder root = new Folder("root"),
+                home = new Folder("home"),
+                garam = new Folder("garam"),
+                music = new Folder("music"),
+                picture = new Folder("picture"),
+                doc = new Folder("doc"),
+                usr = new Folder("usr");
+        File track1 = new File("track1"),
+                track2 = new File("track2"),
+                pic1 = new File("pic1"),
+                doc1 = new File("doc1"),
+                java = new File("java");
+
+        root.addComponent(home);
+            home.addComponent(garam);
+                garam.addComponent(music);
+                    music.addComponent(track1);
+                    music.addComponent(track2);
+                garam.addComponent(picture);
+                    picture.addComponent(pic1);
+                garam.addComponent(doc);
+                    doc.addComponent(doc1);
+        root.addComponent(usr);
+            usr.addComponent(java);
+
+        show(root);
+    }
+
+    private static void show(Component component) {
+        System.out.println(component.getClass().getName() + "|" + component.getName());
+        if(component instanceof Folder) {
+            for (Component c : ((Folder) component).getChildren()) {
+                show(c);
+            }
+        }
+    }
+}