Source Code

/**
 * Represents a proxy for Subject
 */
public class Proxy extends Subject {
	/**
	 * Holds the subject instance.
	 */
	private Subject subject;

	/** @see patterns.gof.proxy.Subject#sampleMethod() */
	public int sampleMethod() {
		return subject.sampleMethod();
	}
}

/**
 * Represents a real subject
 */

public class RealSubject extends Subject {
	public int sampleMethod() {
		/* something happens here */
		return 0;
	}
}

/**
 * Represents a subject
 * 
 * @role __Subject
 */

public abstract class Subject {
	/**
	 * This is sample method to be called by proxy
	 */
	public abstract int sampleMethod();
}