package org.apache.maven.hibernate.beans;
   
   /* ====================================================================
    *   Copyright 2004 The Apache Software Foundation.
    *
    *   Licensed under the Apache License, Version 2.0 (the "License");
    *   you may not use this file except in compliance with the License.
    *   You may obtain a copy of the License at
    *
   *       http://www.apache.org/licenses/LICENSE-2.0
   *
   *   Unless required by applicable law or agreed to in writing, software
   *   distributed under the License is distributed on an "AS IS" BASIS,
   *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *   See the License for the specific language governing permissions and
   *   limitations under the License.
   * ====================================================================
   */
  
  import java.io.File;
  import java.net.URL;
  import java.net.URLClassLoader;
  
  import net.sf.hibernate.HibernateException;
  import net.sf.hibernate.cfg.Configuration;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  /**
   * 
   * Base class for Beans which serve as Proxy To Hibernate API
   * <br/>
   * 
   * @author <a href="michal.maczka@dimatics.com">Michal Maczka</a> 
   * @author <a href="maven@felipeal.net">Felipe Leme</a> 
   * @version $Id: SchemaBeanBase.java 170200 2005-05-15 06:24:19Z brett $
   */
  public abstract class SchemaBeanBase extends CommonOperationsBean
  {
  
     private String properties = null;
     private String config = null;
     private boolean quiet = false;
     private boolean text = false;
     
     protected static final Log LOG = LogFactory.getLog(MappingsAggregatorBean.class);
  
  
     
     /**
      * @return
      */
     public boolean getQuiet()
     {
        return quiet;
     }
  
     /**
      * @return
      */
     public boolean getText()
     {
        return text;
     }
     
     /**
      * @param b
      */
     public void setQuiet(boolean b)
     {
        quiet = b;
     }
  
     /**
      * @param b
      */
     public void setText(boolean b)
     {
        text = b;
     }
  
     /**
      * @return
      */
     public String getConfig()
     {
        return config;
     }
  
     /**
      * @return
      */
     public String getProperties()
     {
        return properties;
     }
  
     /**
     * @param string
     */
    public void setConfig(String string)
    {
       config = string;
    }
 
    /**
     * @param string
     */
    public void setProperties(String string)
    {
       properties = string;
    }
 
    /**
     * 
     * Hibernate requires that 
     * Java classes (beans) are accesible on the
     * classpath. As they are not in plugin classpath
     * we have to take care about. 
     * To assure that we have them visible for plugin
     * classloader
     * we will make temporay change to context classloader
     * which will be restored when method terminates.
     * 
     */
    public void execute() throws Exception
    {
 
       Thread currentThread = Thread.currentThread();
       ClassLoader oldClassLoader = currentThread.getContextClassLoader();
       try
       {
   	    File [] baseDirs = getBaseDirs ();
   	    URL  [] urls = new URL [baseDirs.length];
   	    for (int i = 0; i < urls.length; i++) { 
   		    urls [i] = baseDirs [i].toURL ();
   	    }
   	
         URLClassLoader newClassLoader =
           new URLClassLoader(urls, getClass().getClassLoader());
         currentThread.setContextClassLoader(newClassLoader);
     
         Configuration cfg = getConfiguration();        
         executeSchema( cfg );
 
       }
       finally
       {
          currentThread.setContextClassLoader(oldClassLoader);
       }
    }
 
    /**
    * Method that does the real job
    */
   protected abstract void executeSchema(Configuration cfg) throws Exception;
 
   /**
     * 
     */
    private Configuration getConfiguration() throws HibernateException
    {
       Configuration cfg = new Configuration();
       if (getConfig() != null)
       {      	
       	 File f = new File(getConfig());
       	 LOG.debug("Hibernate Configuration File: " + f.getAbsolutePath());
          cfg.configure(f);
       }
 
       String[] files = getFileNames ();
       for (int i = 0; i < files.length; i++)
       {
          String filename = files[i];
          if (filename.endsWith(".jar"))
          {
             cfg.addJar(filename);
          }
          else
          {
             cfg.addFile(filename);
          }
       }
       return cfg;
    }
 
   private String schemaOutputFile = null;
   private String delimiter = null;
 
 
 
   /**
   * @return
   */
   public String getSchemaOutputFile() {
       return schemaOutputFile;
    }
 
   /**
   * @return
   */
   public String getOutputFile() {
       return schemaOutputFile;
    }
 
   /**
   * @return
   */
   public String getDelimiter() {
       return delimiter;
    }
 
   /**
   * @param string
   */
   public void setSchemaOutputFile(String string) {
       schemaOutputFile = string;
    }
 
   /**
   * @param string
   */
   public void setOutputFile(String string) {
       schemaOutputFile = string;
    }
 
   /**
   * @param string
   */
   public void setDelimiter(String string) {
       delimiter = string;
    }
 
 }