/*
    * Copyright (c) 2002-2014, Mairie de Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.util.jpa;
  
  import fr.paris.lutece.portal.service.util.AppPathService;
  import fr.paris.lutece.util.annotation.AnnotationUtil;
  
  import org.apache.commons.io.FileUtils;
  import org.apache.commons.io.filefilter.FileFilterUtils;
  import org.apache.commons.io.filefilter.TrueFileFilter;
  
  import org.apache.log4j.Logger;
  
  import org.springframework.orm.jpa.persistenceunit.MutablePersistenceUnitInfo;
  import org.springframework.orm.jpa.persistenceunit.PersistenceUnitPostProcessor;
  
  import java.io.File;
  
  import java.util.Collection;
  import java.util.Set;
  
  import javax.persistence.Embeddable;
  import javax.persistence.Entity;
  import javax.persistence.MappedSuperclass;
  
  
  /**
   *
   * JPAPersistenceUnitPostProcessor : adds classpath entities to the PersistenceUnitInfo and finds *.orm.xml.
   */
  public class JPAPersistenceUnitPostProcessor implements PersistenceUnitPostProcessor
  {
      private static final Logger _Log = Logger.getLogger( JPAConstants.JPA_LOGGER );
      private static final String PATH_CONF = "/WEB-INF/classes/";
      private static final String SUFFIX_ORM_XML = ".orm.xml";
      private static final String CLASSPATH_PATH_IDENTIFIER = "fr" + File.separator + "paris";
  
      /**
       * Scans for *.orm.xml and adds Entites from classpath.
       *
       * @param pui the pui
       */
      @Override
      public void postProcessPersistenceUnitInfo( MutablePersistenceUnitInfo pui )
      {
          _Log.info( "Scanning for JPA orm.xml files" );
  
          for ( File ormFile : getListORMFiles(  ) )
          {
              String ormAbsolutePath = ormFile.getAbsolutePath(  );
              _Log.info( "Found ORM file : " + ormAbsolutePath );
              pui.addMappingFileName( ormAbsolutePath.substring( ormAbsolutePath.indexOf( CLASSPATH_PATH_IDENTIFIER ) ) );
          }
  
          _Log.info( "Scanning for JPA entities..." );
  
          Set<String> entityClasses = AnnotationUtil.find( Entity.class.getName(  ) );
          entityClasses.addAll( AnnotationUtil.find( Embeddable.class.getName(  ) ) );
          entityClasses.addAll( AnnotationUtil.find( MappedSuperclass.class.getName(  ) ) );
  
          for ( String strClass : entityClasses )
          {
              _Log.info( "Found entity class : " + strClass );
  
              if ( !pui.getManagedClassNames(  ).contains( strClass ) )
              {
                  pui.addManagedClassName( strClass );
              }
         }
 
         if ( _Log.isDebugEnabled(  ) )
         {
             dumpPersistenceUnitInfo( pui );
         }
     }
 
     /**
      * Search for <code>WEB-INF/conf/plugins/*.orm.xml</code>.
      * @return list of files found
      */
     private Collection<File> getListORMFiles(  )
     {
         String strConfPath = AppPathService.getAbsolutePathFromRelativePath( PATH_CONF );
         File dirConfPlugins = new File( strConfPath );
 
         return FileUtils.listFiles( dirConfPlugins, FileFilterUtils.suffixFileFilter( SUFFIX_ORM_XML ),
             TrueFileFilter.INSTANCE );
     }
 
     /**
      * Show PUI infos
      * @param pui PersistenceUnitInfo
      */
     private void dumpPersistenceUnitInfo( MutablePersistenceUnitInfo pui )
     {
         _Log.debug( "Dumping content for PersistenceUnitInfo of " + pui.getPersistenceUnitName(  ) );
 
         _Log.debug( "** getTransactionType : " + pui.getTransactionType(  ) );
         _Log.debug( "** getPersistenceProviderClassName : " + pui.getPersistenceProviderClassName(  ) );
         _Log.debug( "** getPersistenceProviderPackageName : " + pui.getPersistenceProviderPackageName(  ) );
         _Log.debug( "** getPersistenceUnitName : " + pui.getPersistenceUnitName(  ) );
         _Log.debug( "** getPersistenceXMLSchemaVersion : " + pui.getPersistenceXMLSchemaVersion(  ) );
         _Log.debug( "** getJtaDataSource : " + pui.getJtaDataSource(  ) );
         _Log.debug( "** getManagedClassNames : " + pui.getManagedClassNames(  ) );
         _Log.debug( "** getMappingFileNames : " + pui.getMappingFileNames(  ) );
         _Log.debug( "** getNonJtaDataSource : " + pui.getNonJtaDataSource(  ) );
         _Log.debug( "** getPersistenceUnitRootUrl :" + pui.getPersistenceUnitRootUrl(  ) );
         _Log.debug( "** getProperties : " + pui.getProperties(  ) );
     }
 }