package com.michaelthomas.singleton;

/**
 * @author Michael Thomas (www.michael-thomas.com) michael@michael-thomas.com
 * 
 *         Note: Original concepts came from Wikipedia.com
 *         http://en.wikipedia.org/wiki/Singleton_pattern
 */

public class SingletonLazyInnerClassExample {

	/*
	 * The "On Demand" (aka "Lazy") way to create a Singleton. The INSTANCE is
	 * created the first time getInstance() is called. This solution is
	 * thread-safe without requiring special language constructs (i.e. volatile
	 * or synchronized). Designed by: Bill Pugh from the University of Maryland
	 * because of issues in the Java memory model prior to Java 5.
	 */
	private String name;

	// Private constructor prevents instantiation from other classes
	private SingletonLazyInnerClassExample() {
	}

	/**
	 * SingletonHolder is loaded on the first execution of
	 * Singleton.getInstance() or the first access to SingletonHolder.INSTANCE,
	 * not before.
	 */
	private static class SingletonHolder {
		public static final SingletonLazyInnerClassExample instance = new SingletonLazyInnerClassExample();
	}

	public static SingletonLazyInnerClassExample getInstance() {
		return SingletonHolder.instance;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getName() {
		return name;
	}

}