/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jbpm.client.impl;
import org.jbpm.PvmException;
import org.jbpm.client.Command;
import org.jbpm.env.Environment;
/** performs an authorization check before the command is executed.
* @author Tom Baeyens
*/
public class AuthorizationInterceptor extends Interceptor {
public Object execute(Command command) {
Environment environment = Environment.getCurrent();
if (environment==null) {
throw new PvmException("no environment for verifying authorization");
}
AuthorizationSession authorizationSession = environment.get(AuthorizationSession.class);
if (authorizationSession==null) {
throw new PvmException("no AuthorizationSession in environment for verifying authorization");
}
authorizationSession.checkPermission(command, environment);
// if the authorization check succeeded, proceed
return next.execute(command);
}
}