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 GmbH & Co. KG, 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.setup.db.update6to7;
  
  import org.opencms.setup.CmsSetupDb;
  import org.opencms.setup.db.A_CmsUpdateDBPart;
  
  import java.io.IOException;
  import java.sql.SQLException;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  /**
   * This class drops the outdated tables from the OpenCms database.<p>
   *
   * These tables are
   * CMS_SYSTEMID
   * CMS_TASK
   * CMS_TASKLOG
   * CMS_TASKPAR
   * CMS_TASKTYPE
   * TEMP_PROJECT_UUIDS
   *
   * @since 7.0.0
   */
  public class CmsUpdateDBDropUnusedTables extends A_CmsUpdateDBPart {
  
      /** Constant for the SQL query to drop a table.<p> */
      private static final String QUERY_DROP_TABLE = "Q_DROP_TABLE";
  
      /** Constant for the SQL query properties.<p> */
      private static final String QUERY_PROPERTY_FILE = "cms_drop_unused_tables_queries.properties";
  
      /** Constant for the replacement of the tablename in the sql query.<p> */
      private static final String REPLACEMENT_TABLENAME = "${tablename}";
  
      /** Constant array with the unused tables.<p> */
      private static final String[] UNUSED_TABLES = {
          "CMS_SYSTEMID",
          "CMS_TASK",
          "CMS_TASKLOG",
          "CMS_TASKPAR",
          "CMS_TASKTYPE",
          "TEMP_PROJECT_UUIDS"};
  
      /** Constant ArrayList of the unused tables that are to be dropped.<p> */
      private static final List<String> UNUSED_TABLES_LIST = Collections.unmodifiableList(Arrays.asList(UNUSED_TABLES));
  
      /**
       * Constructor.<p>
       *
       * @throws IOException if the sql queries properties file could not be read
       */
      public CmsUpdateDBDropUnusedTables()
      throws IOException {
  
          super();
          loadQueryProperties(getPropertyFileLocation() + QUERY_PROPERTY_FILE);
      }
  
      /**
       * @see org.opencms.setup.db.A_CmsUpdateDBPart#internalExecute(org.opencms.setup.CmsSetupDb)
       */
      @Override
      protected void internalExecute(CmsSetupDb dbCon) throws SQLException {
  
          System.out.println(new Exception().getStackTrace()[0].toString());
          for (Iterator<String> it = UNUSED_TABLES_LIST.iterator(); it.hasNext();) {
              String table = it.next();
              // Check if the table to drop exists
              if (dbCon.hasTableOrColumn(table, null)) {
                  Map<String, String> replacer = new HashMap<String, String>();
                  replacer.put(REPLACEMENT_TABLENAME, table);
                  dbCon.updateSqlStatement(readQuery(QUERY_DROP_TABLE), replacer, null);
              } else {
                  System.out.println("table " + table + " not found");
              }
          }
      }
  }
  