de.thischwa.pmcms.server.EditorServlet.java Source code

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/*******************************************************************************
 * Poor Man's CMS (pmcms) - A very basic CMS generating static html pages.
 * http://poormans.sourceforge.net
 * Copyright (C) 2004-2013 by Thilo Schwarz
 * 
 * == BEGIN LICENSE ==
 * 
 * Licensed under the terms of any of the following licenses at your
 * choice:
 * 
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 * 
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 * 
 * == END LICENSE ==
 ******************************************************************************/
package de.thischwa.pmcms.server;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

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

import org.apache.commons.io.IOExceptionWithCause;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import de.thischwa.pmcms.conf.InitializationManager;
import de.thischwa.pmcms.exception.RenderingException;
import de.thischwa.pmcms.livecycle.PojoHelper;
import de.thischwa.pmcms.livecycle.SiteHolder;
import de.thischwa.pmcms.model.InstanceUtil;
import de.thischwa.pmcms.model.domain.PoInfo;
import de.thischwa.pmcms.model.domain.pojo.APoormansObject;
import de.thischwa.pmcms.model.domain.pojo.ASiteResource;
import de.thischwa.pmcms.model.domain.pojo.Page;
import de.thischwa.pmcms.view.ViewMode;
import de.thischwa.pmcms.view.context.ContextObjectManager;
import de.thischwa.pmcms.view.renderer.CKEditorWrapper;
import de.thischwa.pmcms.view.renderer.VelocityRenderer;

/**
 * Servlet to manage the different web editors.
 *
 * @author Thilo Schwarz
 */
public class EditorServlet extends AServlet {
    private static Logger logger = Logger.getLogger(EditorServlet.class);
    private VelocityRenderer velocityRenderer = InitializationManager.getBean(VelocityRenderer.class);
    private SiteHolder siteHolder = InitializationManager.getBean(SiteHolder.class);
    private static final long serialVersionUID = 1L;

    @Override
    protected void doRequest(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        String idString = req.getParameter("id");
        Integer id = (StringUtils.isNotBlank(idString)) ? Integer.valueOf(idString) : null;
        Class<?> cls = ContextUtil.getClass(req);

        APoormansObject<?> po;
        if (id != null && id != APoormansObject.UNSET_VALUE)
            po = siteHolder.get(id);
        else
            try {
                po = (APoormansObject<?>) cls.newInstance();
            } catch (Exception e) {
                throw new IOExceptionWithCause(e);
            }

        if (InstanceUtil.isSiteResource(po)) {
            try {
                String html = velocityRenderer.render((ASiteResource) po);
                resp.getWriter().append(html);
            } catch (RenderingException e) {
                throw new IOExceptionWithCause(e);
            }
        } else {
            Page page = (Page) po;
            logger.debug("Try to create an editor for: " + page);
            PojoHelper pojoHolder = new PojoHelper();
            pojoHolder.putpo(page);
            Map<String, Object> addObjs = new HashMap<String, Object>();
            addObjs.put("editor", new CKEditorWrapper(PoInfo.getSite(page), req));
            Map<String, Object> ctxObjs = ContextObjectManager.get(pojoHolder, ViewMode.EDIT);
            ctxObjs.putAll(addObjs);

            try {
                velocityRenderer.render(resp.getWriter(), page, ViewMode.EDIT, ctxObjs);
            } catch (RenderingException e) {
                throw new IOExceptionWithCause(e);
            }
        }

        resp.setHeader("Cache-Control", "no-cache");
    }
}