001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.wiki.action;
016    
017    import com.liferay.portal.kernel.servlet.SessionErrors;
018    import com.liferay.portal.security.auth.PrincipalException;
019    import com.liferay.portal.struts.PortletAction;
020    import com.liferay.portlet.wiki.NoSuchNodeException;
021    import com.liferay.portlet.wiki.model.WikiNode;
022    
023    import javax.portlet.PortletConfig;
024    import javax.portlet.RenderRequest;
025    import javax.portlet.RenderResponse;
026    
027    import org.apache.struts.action.ActionForm;
028    import org.apache.struts.action.ActionForward;
029    import org.apache.struts.action.ActionMapping;
030    
031    /**
032     * @author Jorge Ferrer
033     */
034    public class ViewNodeAction extends PortletAction {
035    
036            public static ActionForward viewNode(
037                            ActionMapping mapping, RenderRequest renderRequest,
038                            String defaultForward)
039                    throws Exception {
040    
041                    try {
042                            WikiNode node = ActionUtil.getNode(renderRequest);
043    
044                            if (node == null) {
045                                    ActionUtil.getFirstVisibleNode(renderRequest);
046                            }
047                    }
048                    catch (Exception e) {
049                            if (e instanceof NoSuchNodeException ||
050                                    e instanceof PrincipalException) {
051    
052                                    SessionErrors.add(renderRequest, e.getClass().getName());
053    
054                                    return mapping.findForward("portlet.wiki.error");
055                            }
056                            else {
057                                    throw e;
058                            }
059                    }
060    
061                    return mapping.findForward(defaultForward);
062            }
063    
064            public ActionForward render(
065                            ActionMapping mapping, ActionForm form, PortletConfig portletConfig,
066                            RenderRequest renderRequest, RenderResponse renderResponse)
067                    throws Exception {
068    
069                    return viewNode(
070                            mapping, renderRequest,
071                            getForward(renderRequest, "portlet.wiki.view_node"));
072            }
073    
074    }