Subversion Repositories bacoAlunos

/*

BERSERK - a BusinEss Runtime and SEcurity Resources Kit

Copyright (C) 2003 Goncalo Luiz

This library 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 library 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 library; if not, write to the Free Software

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

To contact Goncalo Luiz use the following e-mail address (use an @ instead of the _):

gedl_mega.ist.utl.pt

*/

package pt.utl.ist.berserk.logic.serviceManager;

import pt.utl.ist.berserk.ServiceRequest;

import pt.utl.ist.berserk.ServiceResponse;

import pt.utl.ist.berserk.logic.filterManager.FilteringResult;

import pt.utl.ist.berserk.logic.filterManager.IFilterBroker;

import pt.utl.ist.berserk.logic.serviceManager.exceptions.ExecutedFilterException;

import pt.utl.ist.berserk.logic.serviceManager.exceptions.FilterChainFailedException;

import pt.utl.ist.berserk.logic.serviceManager.exceptions.ServiceManagerException;

/**

 * The ServiceInvoker subclass that simply invokes the services

 * without adding any special functionality.

 *

 * @author Joao Pereira

 * @version revision by Goncalo Luiz (gedl \AT/ rnl \DOT/  ist \DOT/ utl \DOT/ pt) at June the 15th, 2004

 **/

public class SimpleServiceInvoker extends ServiceInvoker

{

        public final static SimpleServiceInvoker invocador = new SimpleServiceInvoker();

        public final 5+0%2Fdocs%2Fapi+Object">Object invoke(

                5+0%2Fdocs%2Fapi+Object">Object requester,

                IService service,

                1.5.0/docs/api/java/lang/String.html">String methodName,

                5+0%2Fdocs%2Fapi+Object">Object[] arguments,

                1.5.0/docs/api/java/lang/String.html">String[] names,

                IFilterBroker broker)

        throws ServiceManagerException,1.5.0/docs/api/java/lang/Throwable.html">Throwable

        {

                ServiceRequest request = new ServiceRequest (requester,arguments,names,service,methodName);

                ServiceResponse response = new ServiceResponse();

                boolean passedPre = false;

                boolean passedPost = false;

                FilteringResult filteringResult=null;

                try

                {

                    filteringResult = broker.executePreFiltering(request, response);

                        passedPre = filteringResult.isSuccess();

                }

                catch (1.5.0/docs/api/java/lang/Exception.html">Exception e)

                {

                        throw new ExecutedFilterException(

                                "a not 'FilterException' exception occured while executing pre filter chain",

                                e);

                }

                if (passedPre)

                        //the thown exceptions will go up

                        response.setReturnObject(doInvocation(request.getService(), methodName, request.getArguments()));

                else

                        throw new FilterChainFailedException(

                                "failed to execute preFiltering on service" + service.getClass(),filteringResult);

                try

                {

                    filteringResult = broker.executePostFiltering(request, response);

                    passedPost = filteringResult.isSuccess();

                }

                catch (1.5.0/docs/api/java/lang/Exception.html">Exception e)

                {

                        throw new ExecutedFilterException(

                                "a not 'FilterException' exception occured while executing post filter chain",

                                e);

                }

                if (passedPost)

                {

                        // the sucessfull case

                        return response.getReturnObject();

                }

                else

                        throw new FilterChainFailedException(

                                "failed to execute postFiltering on service" + service.getClass(),filteringResult);

        }

    @1.5.0/docs/api/java/lang/Override.html">Override

    public 5+0%2Fdocs%2Fapi+Object">Object checkFilters(5+0%2Fdocs%2Fapi+Object">Object requester, IService service, 1.5.0/docs/api/java/lang/String.html">String methodName, 5+0%2Fdocs%2Fapi+Object">Object[] arguments, 1.5.0/docs/api/java/lang/String.html">String[] names, IFilterBroker filterBroker) throws ServiceManagerException, 1.5.0/docs/api/java/lang/Throwable.html">Throwable {

        throw new 1.5.0/docs/api/java/lang/RuntimeException.html">RuntimeException("NotImplemented");

    }

}