Java设计模式之外观模式

public class SystemWork01 {
    public void method1() {
        System.out.println("子系统01的业务模式！");
    }
}


public class SystemWork02 {
    public void method1() {
        System.out.println("子系统02的业务模式！");
    }
}


public class SystemWork03 {
    public void method1() {
        System.out.println("子系统03的业务模式！");
    }
}

public class Facade {
    private SystemWork01 obj1 = new SystemWork01();
    private SystemWork02 obj2 = new SystemWork02();
    private SystemWork03 obj3 = new SystemWork03();
    public void method() {
        obj1.method1();
        obj2.method1();
        obj3.method1();
    }
}

public class Client {
    public static void main(String[] args) {
        Facade f = new Facade();
        f.method();
    }

}

 //Configuration 类：
public class Configuration {
	protected ReflectorFactory reflectorFactory = new DefaultReflectorFactory();
	protected ObjectFactory objectFactory = new DefaultObjectFactory();
  	protected ObjectWrapperFactory objectWrapperFactory = new DefaultObjectWrapperFactory();

	 public MetaObject newMetaObject(Object object) {
    	return MetaObject.forObject(object, objectFactory, objectWrapperFactory, reflectorFactory);
    }
}

//MetaObject类
public class MetaObject {
	private Object originalObject;
	private ObjectWrapper objectWrapper;
	private ObjectFactory objectFactory;
	private ObjectWrapperFactory objectWrapperFactory;
	private ReflectorFactory reflectorFactory;

	public static MetaObject forObject(Object object, ObjectFactory objectFactory, ObjectWrapperFactory objectWrapperFactory, ReflectorFactory reflectorFactory) {
    	if (object == null) {
    		return SystemMetaObject.NULL_META_OBJECT;
    	} else {
      		return new MetaObject(object, objectFactory, objectWrapperFactory, reflectorFactory);
    	}
 	}

	private MetaObject(Object object, ObjectFactory objectFactory, ObjectWrapperFactory objectWrapperFactory, ReflectorFactory reflectorFactory) {
    	this.originalObject = object;
    	this.objectFactory = objectFactory;
    	this.objectWrapperFactory = objectWrapperFactory;
   		this.reflectorFactory = reflectorFactory;

    	if (object instanceof ObjectWrapper) {
      		this.objectWrapper = (ObjectWrapper) object;
    	} else if (objectWrapperFactory.hasWrapperFor(object)) {
      		this.objectWrapper = objectWrapperFactory.getWrapperFor(this, object);
    	} else if (object instanceof Map) {
      		this.objectWrapper = new MapWrapper(this, (Map) object);
    	} else if (object instanceof Collection) {
     		this.objectWrapper = new CollectionWrapper(this, (Collection) object);
    	} else {
      		this.objectWrapper = new BeanWrapper(this, object);
  		}
	}
}