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;
      }
  
  }