content: /*
   * Copyright (c) 2016, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * 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 General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj.protocol.a.result;
  
  import java.util.HashMap;
  
  import com.mysql.cj.protocol.ColumnDefinition;
  import com.mysql.cj.protocol.Resultset;
  import com.mysql.cj.protocol.ResultsetRows;
  import com.mysql.cj.result.DefaultColumnDefinition;
  import com.mysql.cj.result.Field;
  import com.mysql.cj.result.Row;
  
  public class NativeResultset implements Resultset {
  
      /** The metadata for this result set */
      protected ColumnDefinition columnDefinition;
  
      /** The actual rows */
      protected ResultsetRows rowData;
  
      protected Resultset nextResultset = null;
  
      /** The id (used when profiling) to identify us */
      protected int resultId;
  
      /** How many rows were affected by UPDATE/INSERT/DELETE? */
      protected long updateCount;
  
      /** Value generated for AUTO_INCREMENT columns */
      protected long updateId = -1;
  
      /**
       * Any info message from the server that was created while generating this result set (if 'info parsing' is enabled for the connection).
       */
      protected String serverInfo = null;
  
      /** Pointer to current row data */
      protected Row thisRow = null; // Values for current row
  
      public NativeResultset() {
      }
  
      /**
       * Create a result set for an executeUpdate statement.
       * 
       * @param ok
       *            {@link OkPacket}
       */
      public NativeResultset(OkPacket ok) {
          this.updateCount = ok.getUpdateCount();
          this.updateId = ok.getUpdateID();
          this.serverInfo = ok.getInfo();
          this.columnDefinition = new DefaultColumnDefinition(new Field[0]);
      }
  
      public NativeResultset(ResultsetRows rows) {
          this.columnDefinition = rows.getMetadata();
          this.rowData = rows;
          this.updateCount = this.rowData.size();
  
          // Check for no results
          if (this.rowData.size() > 0) {
              if (this.updateCount == 1) {
                  if (this.thisRow == null) {
                      this.rowData.close(); // empty result set
                      this.updateCount = -1;
                  }
              }
          } else {
              this.thisRow = null;
          }
  
      }
  
      @Override
      public void setColumnDefinition(ColumnDefinition metadata) {
          this.columnDefinition = metadata;
      }
  
      @Override
      public ColumnDefinition getColumnDefinition() {
          return this.columnDefinition;
      }
  
      public boolean hasRows() {
          return this.rowData != null;
      }
  
      @Override
      public int getResultId() {
          return this.resultId;
      }
  
      public void initRowsWithMetadata() {
          if (this.rowData != null) {
              this.rowData.setMetadata(this.columnDefinition);
          }
          this.columnDefinition.setColumnToIndexCache(new HashMap<String, Integer>());
      }
  
      public synchronized void setNextResultset(Resultset nextResultset) {
          this.nextResultset = nextResultset;
      }
  
      /**
       * @return the nextResultSet, if any, null if none exists.
       */
      public synchronized Resultset getNextResultset() {
          // read next RS from streamer ?
          return this.nextResultset;
      }
  
      /**
       * We can't do this ourselves, otherwise the contract for
       * Statement.getMoreResults() won't work correctly.
       */
      public synchronized void clearNextResultset() {
          // TODO release resources of nextResultset, close streamer
          this.nextResultset = null;
      }
  
      public long getUpdateCount() {
          return this.updateCount;
      }
  
      public long getUpdateID() {
          return this.updateId;
      }
  
      public String getServerInfo() {
          return this.serverInfo;
      }
  
      @Override
      public ResultsetRows getRows() {
          return this.rowData;
      }
  }
  