package org.kuali.spring.util;

 import net.sf.cglib.proxy.Callback;

 import net.sf.cglib.proxy.Enhancer;

 import net.sf.cglib.proxy.NoOp;

 import org.springframework.beans.BeanUtils;

 import org.springframework.beans.factory.FactoryBean;

 import org.springframework.util.Assert;

 /**

  * This class provides a simple mechanism for enabling Spring to create proxied objects. By default a NoOp CallBack will

  * be associated with the proxy object (not very useful) but you can inject any custom CallBack as desired.

  */

 public class SimpleProxyFactoryBean implements FactoryBean<Object> {

     public static final Callback DEFAULT_CALLBACK = NoOp.INSTANCE;

     public static final boolean DEFAULT_IS_COPY_SOURCE_BEAN_PROPERTIES = true;

     Callback callback = DEFAULT_CALLBACK;

     String classname;

     Object sourceBean;

     boolean copySourceBeanProperties = DEFAULT_IS_COPY_SOURCE_BEAN_PROPERTIES;

     public SimpleProxyFactoryBean() {

         this(null, DEFAULT_CALLBACK);

     }

     public SimpleProxyFactoryBean(String classname) {

         this(classname, DEFAULT_CALLBACK);

     }

     public SimpleProxyFactoryBean(String classname, Callback callback) {

         super();

         this.classname = classname;

         this.callback = callback;

     }

     @Override

     public Object getObject() throws Exception {

         Assert.isTrue(this.classname != null || this.sourceBean != null);

         Assert.notNull(this.callback);

         if (this.copySourceBeanProperties) {

             Assert.notNull(this.sourceBean);

         }

         Class<?> targetClass = getTargetClass();

         Enhancer enhancer = new Enhancer();

         enhancer.setSuperclass(targetClass);

         enhancer.setCallback(getCallback());

         Object proxy = enhancer.create();

         if (this.copySourceBeanProperties) {

             BeanUtils.copyProperties(this.sourceBean, proxy);

         }

         return proxy;

     }

     protected Class<?> getTargetClass() throws ClassNotFoundException {

         if (this.classname != null) {

             return Class.forName(this.classname);

         } else {

             return this.sourceBean.getClass();

         }

     }

     @Override

     public Class<?> getObjectType() {

         return Object.class;

     }

     @Override

     public boolean isSingleton() {

         return false;

     }

     public Callback getCallback() {

         return callback;

     }

     public void setCallback(Callback callback) {

         this.callback = callback;

     }

     public String getClassname() {

         return classname;

     }

     public void setClassname(String classname) {

         this.classname = classname;

     }

     public Object getSourceBean() {

         return sourceBean;

     }

     public void setSourceBean(Object source) {

         this.sourceBean = source;

     }

 }