content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://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, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://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.jsp.search.controller;
  
  import org.opencms.file.CmsObject;
  import org.opencms.jsp.search.config.I_CmsSearchConfigurationPagination;
  import org.opencms.jsp.search.state.CmsSearchStatePagination;
  import org.opencms.jsp.search.state.I_CmsSearchStatePagination;
  import org.opencms.search.solr.CmsSolrQuery;
  
  import java.util.Map;
  
  /** Controller for the pagination. */
  public class CmsSearchControllerPagination implements I_CmsSearchControllerPagination {
  
      /** The default page to show. */
      private static final int DEFAULT_PAGE = 1;
      /** The configuration of the pagination. */
      private final I_CmsSearchConfigurationPagination m_config;
      /** The state of the pagination. */
      private final I_CmsSearchStatePagination m_state;
  
      /** Constructor taking a pagination configuration.
       * @param config The pagination configuration.
       */
      public CmsSearchControllerPagination(final I_CmsSearchConfigurationPagination config) {
  
          m_config = config;
          m_state = new CmsSearchStatePagination();
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchController#addParametersForCurrentState(java.util.Map)
       */
      @Override
      public void addParametersForCurrentState(final Map<String, String[]> parameters) {
  
          if (!(m_state.getCurrentPage() == DEFAULT_PAGE)) {
              parameters.put(m_config.getPageParam(), new String[] {Integer.toString(m_state.getCurrentPage())});
          }
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchController#addQueryParts(CmsSolrQuery, CmsObject)
       */
      @Override
      public void addQueryParts(CmsSolrQuery query, CmsObject cms) {
  
          query.setRows(Integer.valueOf(getCurrentPageSize()));
          final int start = getCurrentPageStart();
          query.setStart(Integer.valueOf(start));
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchControllerPagination#getConfig()
       */
      @Override
      public I_CmsSearchConfigurationPagination getConfig() {
  
          return m_config;
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchControllerPagination#getCurrentPageSize()
       */
      @Override
      public int getCurrentPageSize() {
  
          return getConfig().getSizeOfPage(getState().getCurrentPage());
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchControllerPagination#getCurrentPageStart()
       */
      public int getCurrentPageStart() {
  
          return m_config.getStartOfPage(m_state.getCurrentPage());
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchControllerPagination#getState()
       */
      @Override
      public I_CmsSearchStatePagination getState() {
  
          return m_state;
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchController#updateForQueryChange()
       */
      @Override
      public void updateForQueryChange() {
  
          m_state.setIgnorePage(true);
  
      }
  
      /**
       * @see org.opencms.jsp.search.controller.I_CmsSearchController#updateFromRequestParameters(java.util.Map, boolean)
       */
      @Override
      public void updateFromRequestParameters(final Map<String, String[]> parameters, boolean isReloaded) {
  
          if (!m_state.getIgnorePage() && parameters.containsKey(m_config.getPageParam())) {
              final String[] page = parameters.get(m_config.getPageParam());
              if (page.length > 0) {
                  try {
                      m_state.setCurrentPage(Integer.valueOf(page[0]).intValue());
                      return;
                  } catch (@SuppressWarnings("unused") final NumberFormatException e) {
                      m_state.setCurrentPage(DEFAULT_PAGE);
                  }
              }
          }
          m_state.setCurrentPage(DEFAULT_PAGE);
      }
  }
  