The implementation of the design pattern "Decorator"

Author: KutsenkoAlexander

src/ua/kay/patterns/decorator/Developer.java

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+package ua.kay.patterns.decorator;
+
+public interface Developer {
+    public String makeJob();
+}

src/ua/kay/patterns/decorator/DeveloperDecorator.java

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+package ua.kay.patterns.decorator;
+
+public class DeveloperDecorator implements Developer {
+    Developer developer;
+
+    public DeveloperDecorator(Developer developer) {
+        this.developer = developer;
+    }
+
+    @Override
+    public String makeJob() {
+        return developer.makeJob();
+    }
+}

src/ua/kay/patterns/decorator/JavaDeveloper.java

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+package ua.kay.patterns.decorator;
+
+public class JavaDeveloper implements Developer {
+    @Override
+    public String makeJob() {
+        return "Write Java code. ";
+    }
+}

src/ua/kay/patterns/decorator/README.md

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+package ua.kay.patterns.decorator;
+
+public class SeniorJavaDeveloper extends DeveloperDecorator {
+    public SeniorJavaDeveloper(Developer developer) {
+        super(developer);
+    }
+
+    public String makeCodeReview() {
+        return "Make code review. ";
+    }
+
+    @Override
+    public String makeJob() {
+        return super.makeJob() + makeCodeReview();
+    }
+}

src/ua/kay/patterns/decorator/SeniorJavaDeveloper.java

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+package ua.kay.patterns.decorator;
+
+public class Task {
+    public static void main(String[] args) {
+        Developer developer = new TeamLeadJavaDeveloper(new SeniorJavaDeveloper(new JavaDeveloper()));
+        System.out.println(developer.makeJob());
+    }
+}

src/ua/kay/patterns/decorator/Task.java

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+package ua.kay.patterns.decorator;
+
+public class TeamLeadJavaDeveloper extends DeveloperDecorator {
+    public TeamLeadJavaDeveloper(Developer developer) {
+        super(developer);
+    }
+
+    public String sendWeekReport(){
+        return "Send week report to client.";
+    }
+
+    @Override
+    public String makeJob() {
+        return super.makeJob()+sendWeekReport();
+    }
+}