/***************************************************************************
 * Copyright (C) 2003-2009 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 *
 **************************************************************************/
package org.exoplatform.services.migration;

import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.Session;
import javax.jcr.Value;
import javax.jcr.query.Query;
import javax.jcr.query.QueryManager;

import org.exoplatform.services.jcr.RepositoryService;
import org.exoplatform.services.jcr.core.ManageableRepository;
import org.exoplatform.services.jcr.ext.common.SessionProvider;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.picocontainer.Startable;

/**
 * Created by The eXo Platform SARL
 * Author : Nguyen Anh Vu
 *          anhvurz90@gmail.com
 * Feb 17, 2011  
 */
public class ActionMigrationService implements Startable {

  private RepositoryService repoService_;
  private Log log = ExoLogger.getLogger(this.getClass());  

  public ActionMigrationService(RepositoryService repositoryService) {
  	repoService_ = repositoryService;
  }
  
	@Override
	public void start() {
		String exoNodeTypeName = "exo:nodeTypeName";
    SessionProvider sessionProvider = SessionProvider.createSystemProvider();		
    try {
      ManageableRepository repository = repoService_.getCurrentRepository();
      Session session = null; 
      for (String wsName : repository.getWorkspaceNames()) {
      	try {
		      session = sessionProvider.getSession(wsName, repository);
		      QueryManager manager = session.getWorkspace().getQueryManager();
		      String statement = "SELECT * from exo:action WHERE " + exoNodeTypeName + " IS NOT NULL";
		      Query query = manager.createQuery(statement.toString(), Query.SQL);
		      NodeIterator nodes = query.execute().getNodes();
		
		      while (nodes.hasNext()) {
		        Node node = (Node)nodes.next();
		        if (node.getProperty(exoNodeTypeName).getValues().length == 0)
		        	node.setProperty(exoNodeTypeName, (Value[])null);
		      }
		      session.save();		      
		      session.logout();
      	} catch (Exception e) {
      		if (session != null && session.isLive())
      			session.logout();
      		if (log.isErrorEnabled()) log.error("An unexpected problem occurs when migrating data for action nodes in workspace " + wsName, e);
      	}
      }
    } catch (Exception e) {
      if (log.isErrorEnabled()) log.error("An unexpected problem occurs when migrating data for action nodes", e);
    } finally {
      sessionProvider.close();
    }
    if (log.isInfoEnabled()) log.info("Action nodes data migrated successfully!...");
	}

	@Override
	public void stop() {
		// TODO Auto-generated method stub
		
	}

}
