/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2006, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.deployment.spi.beans;

import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.jar.JarOutputStream;

import javax.enterprise.deploy.model.DDBean;
import javax.enterprise.deploy.model.XpathEvent;
import javax.enterprise.deploy.spi.DConfigBean;
import javax.enterprise.deploy.spi.DConfigBeanRoot;
import javax.enterprise.deploy.spi.exceptions.BeanNotFoundException;
import javax.enterprise.deploy.spi.exceptions.ConfigurationException;

import org.jboss.deployment.spi.DeploymentMetaData;

/**
 * @author Rob Stryker
 * @version $Revision: 57190 $
 */
public abstract class AbstractJBossConfigBean implements DConfigBean
{

   protected DDBean myBean;
   protected ArrayList myPropertyListeners;
   protected HashMap xpaths;
   protected DConfigBeanRoot myRoot;
   protected ConfigBeanXPaths myPath;
   protected ArrayList children;

   public AbstractJBossConfigBean(DDBean bean, DConfigBeanRoot root, ConfigBeanXPaths path)
   {
      myBean = bean;
      myRoot = root;
      myPropertyListeners = new ArrayList();
      xpaths = new HashMap();
      myPath = path;
      children = new ArrayList();
		
      /*
       * 		 fill our map
       * 		 this map is to more easily parse through xpaths via map.get(string)
       * 		 rather than iterate through an arraylist until name matches
       */
		
      ConfigBeanXPaths xpathList = buildXPathList();
      Iterator i = xpathList.getChildren().iterator();
      while (i.hasNext())
      {
         ConfigBeanXPaths x = (ConfigBeanXPaths) i.next();
         xpaths.put(x.getPath(), x);
      }

   }


   public DDBean getDDBean()
   {
      return myBean;
   }

   public void addPropertyChangeListener(PropertyChangeListener pcl)
   {
      myPropertyListeners.add(pcl);
   }

   public void removePropertyChangeListener(PropertyChangeListener pcl)
   {
      myPropertyListeners.remove(pcl);
   }


   /**
    * Removes the xpath of a given configbean from the list of this bean's
    * xpaths (children so to speak). Then calls death.
    */
   public void removeDConfigBean(DConfigBean bean) throws BeanNotFoundException
   {
      //childList.remove(bean);
      AbstractJBossConfigBean b = ((AbstractJBossConfigBean) bean);
      Object o = xpaths.get(b.getPath());

      if (o == null)
      {
         throw new BeanNotFoundException("Not Found");
      }
      children.remove(bean);
      xpaths.remove(b.getPath());
      b.death();
   }


   public String[] getXpaths()
   {

      Object[] paths = this.xpaths.values().toArray();
      String[] retval = new String[paths.length];
      for (int i = 0; i < paths.length; i++)
      {
         retval[i] = ((ConfigBeanXPaths) paths[i]).getPath();
      }
      return retval;

   }


   public DConfigBean getDConfigBean(DDBean bean) throws ConfigurationException
   {
      // get a child bean
      String path = bean.getXpath();
      ConfigBeanXPaths cPath = (ConfigBeanXPaths) xpaths.get(path);
      if (cPath == null)
      {
         return null;
      }

      AbstractJBossConfigBean retBean = new JBossNullConfigBean(bean, this.myRoot, cPath);
      children.add(retBean);
      return retBean;
   }

   public class JBossNullConfigBean extends AbstractJBossConfigBean
   {
      public JBossNullConfigBean(DDBean bean, DConfigBeanRoot root, ConfigBeanXPaths path)
      {
         super(bean, root, path);
      }


      /**
       * This bean requires no other xpaths.
       */
      protected ConfigBeanXPaths buildXPathList()
      {
         ConfigBeanXPaths pathRoot = new ConfigBeanXPaths("", null);
         return pathRoot;
      }


      /**
       * All children attempts will return null.
       */
      public DConfigBean getDConfigBean(DDBean bean) throws ConfigurationException
      {
         throw new ConfigurationException("Bean not found");
      }
   }


   public String getPath()
   {
      return myPath.getPath();
   }

   /*
    *   Deletes the children, and also tells them to delete their children. 
    */
   protected void death()
   {
      Iterator i = children.iterator();
      while (i.hasNext())
      {
         AbstractJBossConfigBean b = (AbstractJBossConfigBean) i.next();
         try
         {
            removeDConfigBean(b);
         }
         catch (BeanNotFoundException e)
         {
         }
      }
      xpaths.clear();
   }


   public void notifyDDChange(XpathEvent arg0)
   {

   }

   // OVER RIDE ME
   public void save(JarOutputStream stream, DeploymentMetaData metaData)
   {

   }


   protected abstract ConfigBeanXPaths buildXPathList();


}
