code: /*
   *  LanguageTool, a natural language style checker
   *  * Copyright (C) 2018 Fabian Richter
   *  *
   *  * 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.
   *  *
   *  * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   *  * USA
   *
   */
  
  package org.languagetool.server;
  
  import org.jetbrains.annotations.Nullable;
  
  import java.io.PrintStream;
  import java.util.Map;
  
  /**
   * @since 4.3
   */
  public abstract class DatabaseLogEntry {
  
    /**
     * @return parameters for mybatis SQL statement
     */
    public abstract Map<Object, Object> getMapping();
  
    /**
     * @return identifier for mybatis SQL statement
     */
    public abstract String getMappingIdentifier();
  
    /**
     * for interdependent log entries, i.e. with foreign keys referencing other entries
     * @return null if no followup needed, else log entry that needs to be inserted directly afterwards
     * e.g. to use LAST_INSERT_ID from mysql
     */
    @SuppressWarnings("UnusedReturnValue")
    @Nullable
    public DatabaseLogEntry followup() {
      // default: nothing to be done
      return null;
    }
  
    public void print(PrintStream out) {
      out.println(getMappingIdentifier());
      out.print(getMapping());
      out.println();
    }
  
    public void print() {
      this.print(System.out);
    }
  }
  