gt:         if (result == null) {
context: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
   *
   * This library 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 library 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.
   *
   * For further information about Alkacon Software GmbH, please see the
   * company website: http://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: http://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.search;
  
  import org.opencms.file.CmsObject;
  import org.opencms.file.CmsResource;
  import org.opencms.main.CmsException;
  import org.opencms.main.CmsLog;
  import org.opencms.report.I_CmsReport;
  import org.opencms.search.documents.CmsIndexNoContentException;
  import org.opencms.search.documents.I_CmsDocumentFactory;
  
  import org.apache.commons.logging.Log;
  
  /**
   * Implements the indexing method for a single resource as thread.<p>
   *
   * The indexing of a single resource is wrapped into a thread
   * in order to prevent the overall indexer from hanging.<p>
   *
   * @since 6.0.0
   */
  public class CmsIndexingThread extends Thread {
  
      /** The log object for this class. */
      private static final Log LOG = CmsLog.getLog(CmsIndexingThread.class);
  
      /** The cms object. */
      private CmsObject m_cms;
  
      /** The counter to output for the report. */
      private int m_count;
  
      /** The current index. */
      private CmsSearchIndex m_index;
  
      /** The current report. */
      private I_CmsReport m_report;
  
      /** The resource to index. */
      private CmsResource m_res;
  
      /** The result document. */
      private I_CmsSearchDocument m_result;
  
      /**
       * Create a new indexing thread.<p>
       *
       * @param cms the current OpenCms user context
       * @param res the resource to index
       * @param index the index to update the resource in
       * @param count the report count
       * @param report the report to write the output to
       */
      public CmsIndexingThread(CmsObject cms, CmsResource res, CmsSearchIndex index, int count, I_CmsReport report) {
  
          super("OpenCms: Indexing '" + res.getName() + "'");
  
          m_cms = cms;
          m_res = res;
          m_index = index;
          m_count = count;
          m_report = report;
          m_result = null;
      }
  
      /**
       * Returns the document created by this indexer thread.<p>
       *
       * In case the resource could not be indexed, <code>null</code> is returned.<p>
       *
       * @return the document created by this indexer thread
       */
      public I_CmsSearchDocument getResult() {
  
          return m_result;
      }
  
      /**
       * Starts the thread to index a single resource.<p>
       *
       * @see java.lang.Runnable#run()
       */
      @Override
      public void run() {
  
          // flag for logging in the "final" block
          boolean docOk = false;
          try {
  
              // create the index document
              m_result = createIndexDocument(m_cms, m_res, m_index, m_count, m_report);
              docOk = true;
  
              // check if the thread was interrupted
              if (isInterrupted() && LOG.isDebugEnabled()) {
                  LOG.debug(
                      Messages.get().getBundle().key(Messages.LOG_ABANDONED_THREAD_FINISHED_1, m_res.getRootPath()));
              }
  
          } catch (CmsIndexNoContentException e) {
              // Ignore exception caused by empty documents, so that the report is not messed up with error message
              m_report.println(
                  org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_OK_0),
                  I_CmsReport.FORMAT_OK);
          } catch (Exception exc) {
              if (m_report != null) {
                  m_report.println(
                      org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_FAILED_0),
                      I_CmsReport.FORMAT_ERROR);
                  m_report.println(
                      org.opencms.report.Messages.get().container(
                          org.opencms.report.Messages.RPT_ARGUMENT_1,
                          exc.toString()),
                      I_CmsReport.FORMAT_ERROR);
              }
              if (LOG.isErrorEnabled()) {
                  LOG.error(
                      Messages.get().getBundle().key(
                          Messages.ERR_INDEX_RESOURCE_FAILED_2,
                          m_res.getRootPath(),
                          m_index.getName()),
                      exc);
              }
              // set flag to avoid logging in finally block
              docOk = true;
          } finally {
              if (!docOk) {
                  // apparently there was a Throwable that causes an issue
                  if (m_report != null) {
                      m_report.println(
                          org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_FAILED_0),
                          I_CmsReport.FORMAT_ERROR);
                      m_report.println(
                          Messages.get().container(
                              Messages.ERR_INDEX_RESOURCE_FAILED_2,
                              m_res.getRootPath(),
                              m_index.getName()),
                          I_CmsReport.FORMAT_ERROR);
                  }
                  if (LOG.isErrorEnabled()) {
                      LOG.error(
                          Messages.get().getBundle().key(
                              Messages.ERR_INDEX_RESOURCE_FAILED_2,
                              m_res.getRootPath(),
                              m_index.getName()));
                  }
              }
          }
      }
  
      /**
       * Creates the search index document.<p>
       *
       * @param cms the current OpenCms user context
       * @param res the resource to index
       * @param index the index to update the resource in
       * @param count the report count
       * @param report the report to write the output to
       *
       * @return the created search index document
       *
       * @throws CmsException in case of issues while creating the search index document
       */
      protected I_CmsSearchDocument createIndexDocument(
          CmsObject cms,
          CmsResource res,
          CmsSearchIndex index,
          int count,
          I_CmsReport report) throws CmsException {
  
          I_CmsSearchDocument result = null;
  
          if (report != null) {
              report.print(
                  org.opencms.report.Messages.get().container(
                      org.opencms.report.Messages.RPT_SUCCESSION_1,
                      String.valueOf(count)),
                  I_CmsReport.FORMAT_NOTE);
              report.print(Messages.get().container(Messages.RPT_SEARCH_INDEXING_FILE_BEGIN_0), I_CmsReport.FORMAT_NOTE);
              report.print(
                  org.opencms.report.Messages.get().container(
                      org.opencms.report.Messages.RPT_ARGUMENT_1,
                      report.removeSiteRoot(res.getRootPath())));
              report.print(
                  org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_DOTS_0),
                  I_CmsReport.FORMAT_DEFAULT);
          }
  
          // check if this resource should be excluded from the index, if so skip it
          boolean excludeFromIndex = index.excludeFromIndex(cms, res);
  
          if (!excludeFromIndex) {
              // resource is to be included in the index
              I_CmsDocumentFactory documentFactory = index.getDocumentFactory(res);
              if (documentFactory != null) {
                  // some resources e.g. JSP do not have a default document factory
                  if (LOG.isDebugEnabled()) {
                      LOG.debug(
                          Messages.get().getBundle().key(
                              Messages.LOG_INDEXING_WITH_FACTORY_2,
                              res.getRootPath(),
                              documentFactory.getName()));
                  }
                  // create the document
                  result = documentFactory.createDocument(cms, res, index);
              }
          }
  