/taurus-web/src/org/taurus/web/gwt/server/BaseServiceRemote.java

/*

 * This file is part of Taurus

 *

 * Taurus is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * at your option) any later version.

 *

 * Taurus 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 Melenti.  If not, see <http://www.gnu.org/licenses/>.

 */



package org.taurus.web.gwt.server;



import java.util.ArrayList;

import java.util.List;



import org.apache.commons.beanutils.BeanUtils;

import org.apache.log4j.Logger;

import org.taurus.services.ServiceAdministrator;

import org.taurus.services.ServiceProject;

import org.taurus.services.ServiceSecurity;



import com.google.gson.Gson;

import com.google.gson.GsonBuilder;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;

import com.thoughtworks.xstream.XStream;

import com.thoughtworks.xstream.io.json.JettisonMappedXmlDriver;



/**

 * Incluir aquí la descripcion de la clase.

 * 

 * @version $Revision: 1.0 $ [17/07/2008]

 * @author henry molina <a href="mailto:henrymolinanoboa@gmail.com">taurus</a>

 */



public class BaseServiceRemote extends RemoteServiceServlet {



	private static final long serialVersionUID = 4394294482171221329L;



	protected static ServiceSecurity serviceSecurity;



	protected static ServiceAdministrator serviceAdministrator;



	protected static ServiceProject serviceProject;



	protected static XStream xstream;



	protected static Gson gson = null;



	private static Logger log = Logger.getLogger(BaseServiceRemote.class);



	/**

	 * 

	 */



	public BaseServiceRemote() {

		super();

		if (serviceSecurity == null) {

			serviceSecurity = ServiceSecurity.Util.getInstance();

		}

		if (serviceAdministrator == null) {

			serviceAdministrator = ServiceAdministrator.Util.getInstance();

		}

		if (serviceProject == null) {

			serviceProject = ServiceProject.Util.getInstance();

		}

		if (xstream == null) {

			xstream = new XStream(new JettisonMappedXmlDriver());



		}



		if (gson == null) {

			final GsonBuilder gsonBuilder = new GsonBuilder();

			gsonBuilder.setDateFormat("dd/MM/yyyy");

			gson = gsonBuilder.excludeFieldsWithoutExposeAnnotation().create();

		}



	}



	/**

	 * Incluir aquí la descripcion del metodo.

	 * 

	 * @param json

	 * @return

	 */



	@SuppressWarnings("unchecked")

	protected synchronized Object fromJson(final String json, Class clazz) {

		Object obj = gson.fromJson(json, clazz);

		if (log.isDebugEnabled()) {

			try {

				BeanUtils.describe(obj);

			} catch (Exception e) {

				log.error(e);

			}

		}

		return obj;

	}



	@SuppressWarnings("unchecked")

	protected Object getAttributeContextHttp(final Class clazz) {

		return getThreadLocalRequest().getSession(false).getServletContext().getAttribute(clazz.getName());

	}



	/**

	 * Incluir aqui­ la descripcion del metodo.

	 * 

	 * @param name

	 * @return

	 */



	protected Object getAttributeContextHttp(final String name) {

		return getThreadLocalRequest().getSession(false).getServletContext().getAttribute(name);

	}



	/**

	 * Recupera un objeto desde el request http

	 * 

	 * @param clazz

	 * @return

	 */



	protected Object getAttributeRequestHttp(final Class<Object> clazz) {

		Object obj = getThreadLocalRequest().getAttribute(clazz.getName());

		if (obj == null) {

			obj = getThreadLocalRequest().getParameter(clazz.getName());

		}

		return obj;

	}



	/**

	 * Recupera un objeto desde el session http

	 * 

	 * @param clazz

	 * @return

	 */



	protected Object getAttributeSessionHttp(final Class clazz) {

		return getThreadLocalRequest().getSession(false).getAttribute(clazz.getName());

	}



	/**

	 * Incluir aquí la descripcion del metodo.

	 * 

	 * @param name

	 * @return

	 */



	protected Object getAttributeSessionHttp(final String name) {

		return getThreadLocalRequest().getSession(false).getAttribute(name);

	}



	protected void invalidateSessionUser() {

		getThreadLocalRequest().getSession().invalidate();

	}



	/**

	 * 

	 * @param name

	 */

	protected void removeAttributeSessionHttp(String name) {

		getThreadLocalRequest().getSession(false).removeAttribute(name);

	}



	protected void resetSessionUser() {

		getThreadLocalRequest().getSession().invalidate();

		getThreadLocalRequest().getSession(true);

	}



	/**

	 * Establece el valor del atributo usando como nombre el fcn de la clase del objeto pasado como valor

	 * 

	 * @param value

	 */

	protected void setAttributeContextHttp(Object value) {

		getThreadLocalRequest().getSession(false).getServletContext().setAttribute(value.getClass().getName(), value);

	}



	/**

	 * Estblece el valor de una variable de contexto de la aplicación

	 * 

	 * @param name

	 *            el nombre del atributo

	 * @param value

	 *            el valor que va a tener el atributo

	 */

	protected void setAttributeContextHttp(final String name, Object value) {

		getThreadLocalRequest().getSession(false).getServletContext().setAttribute(name, value);

	}



	/**

	 * Guarda un objeto en el request http

	 * 

	 * @param object

	 */



	protected void setAttributeRequestHttp(final Object object) {

		getThreadLocalRequest().setAttribute(object.getClass().getName(), object);

	}



	/**

	 * Guarda un objeto en el session http

	 * 

	 * @param object

	 */



	protected void setAttributeSessionHttp(final Object object) {

		getThreadLocalRequest().getSession(false).setAttribute(object.getClass().getName(), object);

	}



	/**

	 * Incluir aquí la descripcion del metodo.

	 * 

	 * @param name

	 * @param object

	 */



	protected void setAttributeSessionHttp(final String name, final Object object) {

		getThreadLocalRequest().getSession(false).setAttribute(name, object);

	}



	/**

	 * transforma un objeto a formato json

	 * 

	 * @param object

	 * @return

	 */



	protected String toJson(Object object) {

		xstream.alias(object.getClass().getSimpleName().substring(0, 1).toLowerCase()

				+ object.getClass().getSimpleName().substring(1), object.getClass());

		return xstream.toXML(object);



	}



	/**

	 * Incluir aquí la descripcion del metodo.

	 * 

	 * @param object

	 * @return

	 */



	protected synchronized String toJson2(final Object object) {

		String json = null;

		if (object instanceof ArrayList) {

			json = gson.toJson(object);

		} else {

			List<Object> list = new ArrayList<Object>();

			list.add(object);

			json = gson.toJson(list);

		}

		if (log.isDebugEnabled()) {

			log.debug(json);

		}

		return json;

	}



}