LinkToServlet.java :  » Wiki-Engine » gwtwiki » org » jamwiki » servlets » Java Open Source

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gwtwiki » org » jamwiki » servlets » LinkToServlet.java
/**
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE, version 2.1, dated February 1999.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the latest version of the GNU Lesser General
 * Public License as published by the Free Software Foundation;
 *
 * This program 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 program (LICENSE.txt); if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.jamwiki.servlets;

import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.jamwiki.WikiBase;
import org.jamwiki.WikiException;
import org.jamwiki.WikiMessage;
import org.jamwiki.model.SearchResultEntry;
import org.jamwiki.utils.WikiLogger;
import org.jamwiki.utils.WikiUtil;
import org.springframework.web.servlet.ModelAndView;

/**
 * Used to display all topics that contain links to the current topic.
 */
public class LinkToServlet extends JAMWikiServlet {

  private static final WikiLogger logger = WikiLogger
      .getLogger(LinkToServlet.class.getName());
  /** The name of the JSP file used to render the servlet output. */
  protected static final String JSP_LINKTO = "linkto.jsp";

  /**
   *
   */
  protected ModelAndView handleJAMWikiRequest(HttpServletRequest request,
      HttpServletResponse response, ModelAndView next, WikiPageInfo pageInfo)
      throws Exception {
    this.linksTo(request, next, pageInfo);
    return next;
  }

  /**
   *
   */
  private void linksTo(HttpServletRequest request, ModelAndView next,
      WikiPageInfo pageInfo) throws Exception {
    String virtualWiki = pageInfo.getVirtualWikiName();
    String topicName = WikiUtil.getTopicFromRequest(request);
    if (StringUtils.isBlank(topicName)) {
      throw new WikiException(new WikiMessage("common.exception.notopic"));
    }
    WikiMessage pageTitle = new WikiMessage("linkto.title", topicName);
    pageInfo.setPageTitle(pageTitle);
    // grab search engine instance and find
    // List<SearchResultEntry> results =
    // WikiBase.getSearchEngine().findLinkedTo(virtualWiki, topicName);
    // next.addObject("results", results);
    // next.addObject("link", topicName);
    pageInfo.setContentJsp(JSP_LINKTO);
    pageInfo.setTopicName(topicName);
  }
}
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