GroupInterceptor.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2009-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) 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.
 *
 * OpenNMS(R) 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 OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
 *     http://www.opennms.org/
 *     http://www.opennms.com/
 *
 * From the original copyright headers:
 *
 * Copyright (c) 2009+ desmax74
 * Copyright (c) 2009+ The OpenNMS Group, Inc.
 *
 * This program was developed and is maintained by Rocco RIONERO
 * ("the author") and is subject to dual-copyright according to
 * the terms set in "The OpenNMS Project Contributor Agreement".
 *
 * The author can be contacted at the following email address:
 *
 *     Massimiliano Dessì
 *     desmax74@yahoo.it
 *******************************************************************************/

package org.opennms.acl.ui.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.opennms.acl.domain.Group;
import org.opennms.acl.factory.GroupFactory;
import org.opennms.acl.util.Constants;
import org.opennms.core.utils.BeanUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

/**
 * Interceptor to put a Group in the request
 *
 * @author Massimiliano Dessì (desmax74@yahoo.it)
 * @since jdk 1.5.0
 * @version $Id: $
 */
public class GroupInterceptor extends HandlerInterceptorAdapter implements InitializingBean {

    /** {@inheritDoc} */
    @Override
    public boolean preHandle(HttpServletRequest req, HttpServletResponse res, Object handler) throws Exception {
        Integer gid = ServletRequestUtils.getIntParameter(req, Constants.GROUP_ID, 0);
        if (!gid.equals(0)) {
            // cache this invocation with trasparent aop cache
            Group group = groupFactory.getGroup(gid);
            req.setAttribute(Constants.GROUP, group);
        }
        return true;
    }

    @Autowired
    private GroupFactory groupFactory;

    @Override
    public void afterPropertiesSet() throws Exception {
        BeanUtils.assertAutowiring(this);
    }
}