Sample usage of proxy pattern added

.travis.yml

@@ -1,3 +1,3 @@
 language: java
 jdk:
-    - oraclejdk8
+    - openjdk8

src/main/java/com/gazbert/patterns/structural/proxy/AuthorizedUser.java

@@ -0,0 +1,15 @@
+package com.gazbert.patterns.structural.proxy;
+
+/**
+ * Proxy for authorized user
+ *
+ * @author ramazansakin
+ */
+public class AuthorizedUser implements User {
+
+	@Override
+	public void checkOut() {
+		System.out.println("User authorized. Logging in...");
+	}
+
+}

src/main/java/com/gazbert/patterns/structural/proxy/GuestUser.java

@@ -0,0 +1,15 @@
+package com.gazbert.patterns.structural.proxy;
+
+/**
+ * Proxy for guest user
+ *
+ * @author ramazansakin
+ */
+public class GuestUser implements User {
+
+	@Override
+	public void checkOut() {
+		System.out.println("User unauthorized. Delegeting to Registration Page...");
+	}
+
+}

src/main/java/com/gazbert/patterns/structural/proxy/User.java

@@ -0,0 +1,10 @@
+package com.gazbert.patterns.structural.proxy;
+
+/**
+ * User Interface
+ *
+ * @author ramazansakin
+ */
+public interface User {
+	void checkOut();
+}

src/main/java/com/gazbert/patterns/structural/proxy/UserProxy.java

@@ -0,0 +1,10 @@
+package com.gazbert.patterns.structural.proxy;
+
+/**
+ * User Proxy Interface
+ *
+ * @author ramazansakin
+ */
+public interface UserProxy {
+	User getUser();
+}

src/main/java/com/gazbert/patterns/structural/proxy/UserProxyHandler.java

@@ -0,0 +1,26 @@
+package com.gazbert.patterns.structural.proxy;
+
+/**
+ * Authorization handling via user proxy
+ *
+ * @author ramazansakin
+ */
+public class UserProxyHandler implements UserProxy{
+
+	private boolean isLoggedIn;
+
+	public UserProxyHandler(boolean isLoggedIn) {
+		this.isLoggedIn = isLoggedIn;
+	}
+
+	@Override
+	public User getUser() {
+		User user;
+		if (isLoggedIn) {
+			user = new AuthorizedUser();
+		} else {
+			user = new GuestUser();
+		}
+		return user;
+	}
+}

src/test/java/com/gazbert/patterns/structural/proxy/TestProxyPattern.java

@@ -0,0 +1,27 @@
+package com.gazbert.patterns.structural.proxy;
+
+import org.junit.Test;
+
+/**
+ * Demonstrates use of Proxy pattern.
+ *
+ * @author ramazansakin
+ */
+public class TestProxyPattern {
+
+	/**
+	 * Detecting authorized user via proxy sample test
+	 *
+	 * @author ramazansakin
+	 */
+	@Test
+	public void testUserProxy() {
+
+		User authUser = new AuthorizedUser();
+		authUser.checkOut();
+
+		User guest = new GuestUser();
+		guest.checkOut();
+	}
+
+}