Instantiate Composite

Author: LBeghini

README.md

@@ -1,90 +1,3 @@
 # ☕ Java Design Patterns
 
-## About
-
-This application is a simple Java Console Application that aims to implement design pattern examples to a Programmin Language Class. A set of design patterns will be developed
-each week, and they are divided in different [branches](https://github.com/LBeghini/Java-Design-Patterns/branches).  
-
-The main branch is just a template for every other branch.
-
-Also, to make it easier to download the source code, [releases](https://github.com/LBeghini/Java-Design-Patterns/releases) are created related to the task of the week, giving a snapshot of the code for that specific implementation.
-
-## Implemented design patterns
-
-### Behavioural patterns
-
-- [x] [Chain of responsibility](https://github.com/LBeghini/Java-Design-Patterns/tree/4-chain-of-responsibility)
-- [x] [Command](https://github.com/LBeghini/Java-Design-Patterns/tree/6-command)
-- [x] [Iterator](https://github.com/LBeghini/Java-Design-Patterns/tree/4-iterator)
-- [x] [Memento](https://github.com/LBeghini/Java-Design-Patterns/tree/5-memento)
-- [x] [Observer](https://github.com/LBeghini/Java-Design-Patterns/tree/5-observer)
-- [x] [State](https://github.com/LBeghini/Java-Design-Patterns/tree/3-state)
-- [x] [Strategy](https://github.com/LBeghini/Java-Design-Patterns/tree/6-strategy)
-- [x] [Template method](https://github.com/LBeghini/Java-Design-Patterns/tree/4-template-method)
-
-### Creational patterns
-
-- [ ] Abstract factory
-- [x] [Builder](https://github.com/LBeghini/Java-Design-Patterns/tree/1-builder)
-- [x] [Factory method](https://github.com/LBeghini/Java-Design-Patterns/tree/2-factory-method)
-- [x] [Prototype](https://github.com/LBeghini/Java-Design-Patterns/tree/2-prototype)
-- [x] [Singleton](https://github.com/LBeghini/Java-Design-Patterns/tree/1-singleton)
-
-### Structural patterns
-
-- [x] [Adapter](https://github.com/LBeghini/Java-Design-Patterns/tree/7-adapter)
-- [x] [Bridge](https://github.com/LBeghini/Java-Design-Patterns/tree/7-bridge)
-- [ ] Composite
-- [ ] Decorator
-- [ ] Facade
-- [ ] Flyweight
-- [ ] Mediator
-- [ ] Proxy
-
-## Technologies
-
-- Java
-- JUnit
-- Maven
-
-## Requirements 
-
-To run and edit the project, be sure to have installed in your computer the following softwares:
-- A code editor
-
-After that, you'll need to clone this repo:
-
-```bash
-git clone https://github.com/LBeghini/Java-Design-Patterns.git
-```
-
-## Change branch
-
-To change to a different branch, run the command:
-
-```bash
-git checkout name-of-the-branch
-```
-
-The branch names have the pattern:
-
-```bash
-{number-of-the-week}-{pattern-name}
-```
-
-> `number-of-the-week` corresponds to the week asked to be implemented certain pattern 
-
-## Testing
-
-This project has no aim to run any of the implemented classes, as the goal is the code itself. However, the classes will be tested to visualize the behaviour and implementation 
-of the patterns.  
-
-You can run the tests using the maven wrapper:
-
-```bash
-./mvnw test 
-```
-
-## :balance_scale: License
-
-[MIT License](https://github.com/LBeghini/Java-Design-Patterns/blob/main/LICENSE)
+## Composite

src/main/java/com/language/programming/src/Box.java

@@ -0,0 +1,28 @@
+package com.language.programming.src;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Box extends Package {
+
+    private List<Package> content;
+
+    public Box(String description) {
+        super(description);
+        this.content = new ArrayList<>();
+    }
+
+    public void addContent(Package content) {
+        this.content.add(content);
+    }
+
+    @Override
+    public String getContent() {
+        StringBuilder output = new StringBuilder();
+        output.append(this.getDescription() + "\n");
+        for (Package content : content) {
+            output.append(content.getContent() + "\n");
+        }
+        return output.toString();
+    }
+}

src/main/java/com/language/programming/src/Item.java

@@ -0,0 +1,14 @@
+package com.language.programming.src;
+
+public class Item extends Package {
+
+    public Item(String description) {
+        super(description);
+    }
+
+    @Override
+    public String getContent() {
+        return this.getDescription();
+    }
+
+}

src/main/java/com/language/programming/src/Order.java

@@ -0,0 +1,17 @@
+package com.language.programming.src;
+
+public class Order {
+    private Package pack;
+
+    public void setPackage(Package pack) {
+        this.pack = pack;
+    }
+
+    public String getPackage() {
+        if (this.pack == null) {
+            throw new NullPointerException();
+        }
+        return this.pack.getContent();
+    }
+
+}

src/main/java/com/language/programming/src/Package.java

@@ -0,0 +1,21 @@
+package com.language.programming.src;
+
+public abstract class Package {
+
+    private String description;
+
+    public Package(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public abstract String getContent();
+
+}

src/test/java/com/language/programming/src/OrderTest.java

@@ -0,0 +1,35 @@
+package com.language.programming.src;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class OrderTest {
+
+    @Test
+    public void shouldReturnOrderPackage() {
+        Box box1 = new Box("Bubble Wrap");
+
+        Box box2 = new Box("Sensitive content");
+        Item item21 = new Item("Smartphone");
+        box2.addContent(item21);
+
+        Box box3 = new Box("Random content");
+        Item item31 = new Item("Book");
+        Item item32 = new Item("Shovel");
+        box3.addContent(item31);
+        box3.addContent(item32);
+
+        Box pack = new Box("Package");
+        pack.addContent(box1);
+        pack.addContent(box2);
+        pack.addContent(box3);
+
+        Order order = new Order();
+        order.setPackage(pack);
+
+        assertEquals("Package\n" + "Bubble Wrap\n" + "\n" + "Sensitive content\n" + "Smartphone\n" + "\n"
+                + "Random content\n" + "Book\n" + "Shovel\n" + "\n", order.getPackage());
+    }
+
+}