Model

  Seam中含有三种组建
  1.Model 2.Entity 3.Component  2继承1 3继承1
  Seam中的内部对象不是为Mode就是Entity
  用Model可以包装@Name标记的类Class
  同时Component继承Model,对Class进行一些复杂的处理

  package org.jboss.seam;

import org.jboss.seam.contexts.Contexts;

 
public class Model
{
   private Class<?> beanClass;

   public Model(Class<?> beanClass)
   {
      this.beanClass = beanClass;
   }
   
   public final Class<?> getBeanClass()
   {
      return beanClass;
   }

   public static Model forClass(Class clazz)
   {
      if ( !Contexts.isApplicationContextActive() ) //检测ApplicationContext是否被设置
      {
         throw new IllegalStateException("No application context active");
      }
      
      String name = getModelName(clazz);
      Model model = (Model) Contexts.getApplicationContext().get(name);
      if ( model==null )
      {
         model = clazz.isAnnotationPresent(javax.persistence.Entity.class) ?  //检测是否是Entity ,不是则为Model
                  new Entity(clazz) : new Model(clazz);
         Contexts.getApplicationContext().set(name, model);
      }
      return model;
   }

   static String getModelName(Class clazz)  //包名+类名.model
   {
      return clazz.getName() + ".model";
   }

}