content: /*
   * Copyright (c) 2002, 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.List;
  
  import com.mysql.cj.protocol.ColumnDefinition;
  import com.mysql.cj.protocol.ResultsetRows;
  import com.mysql.cj.result.Row;
  
  /**
   * Represents an in-memory result set
   */
  public class ResultsetRowsStatic extends AbstractResultsetRows implements ResultsetRows {
  
      private List<Row> rows;
  
      /**
       * Creates a new RowDataStatic object.
       * 
       * @param rows
       *            list of {@link Row} instances
       * @param columnDefinition
       *            {@link ColumnDefinition} for this result set
       */
      @SuppressWarnings("unchecked")
      public ResultsetRowsStatic(List<? extends Row> rows, ColumnDefinition columnDefinition) {
          this.currentPositionInFetchedRows = -1;
          this.rows = (List<Row>) rows;
          this.metadata = columnDefinition;
      }
  
      @Override
      public void addRow(Row row) {
          this.rows.add(row);
      }
  
      @Override
      public void afterLast() {
          if (this.rows.size() > 0) {
              this.currentPositionInFetchedRows = this.rows.size();
          }
      }
  
      @Override
      public void beforeFirst() {
          if (this.rows.size() > 0) {
              this.currentPositionInFetchedRows = -1;
          }
      }
  
      @Override
      public void beforeLast() {
          if (this.rows.size() > 0) {
              this.currentPositionInFetchedRows = this.rows.size() - 2;
          }
      }
  
      @Override
      public Row get(int atIndex) {
          if ((atIndex < 0) || (atIndex >= this.rows.size())) {
              return null;
          }
  
          return this.rows.get(atIndex).setMetadata(this.metadata);
      }
  
      @Override
      public int getPosition() {
          return this.currentPositionInFetchedRows;
      }
  
      @Override
      public boolean hasNext() {
          boolean hasMore = (this.currentPositionInFetchedRows + 1) < this.rows.size();
  
          return hasMore;
      }
  
      @Override
      public boolean isAfterLast() {
          return this.currentPositionInFetchedRows >= this.rows.size() && this.rows.size() != 0;
      }
  
      @Override
      public boolean isBeforeFirst() {
          return this.currentPositionInFetchedRows == -1 && this.rows.size() != 0;
      }
  
      @Override
      public boolean isDynamic() {
          return false;
      }
  
      @Override
      public boolean isEmpty() {
          return this.rows.size() == 0;
      }
  
      @Override
      public boolean isFirst() {
          return this.currentPositionInFetchedRows == 0;
      }
  
      @Override
      public boolean isLast() {
          // You can never be on the 'last' row of an empty result set
          if (this.rows.size() == 0) {
              return false;
          }
  
          return (this.currentPositionInFetchedRows == (this.rows.size() - 1));
      }
  
      @Override
      public void moveRowRelative(int rowsToMove) {
          if (this.rows.size() > 0) {
              this.currentPositionInFetchedRows += rowsToMove;
              if (this.currentPositionInFetchedRows < -1) {
                  beforeFirst();
              } else if (this.currentPositionInFetchedRows > this.rows.size()) {
                  afterLast();
              }
          }
      }
  
      @Override
      public Row next() {
          this.currentPositionInFetchedRows++;
  
          if (this.currentPositionInFetchedRows > this.rows.size()) {
              afterLast();
          } else if (this.currentPositionInFetchedRows < this.rows.size()) {
              Row row = this.rows.get(this.currentPositionInFetchedRows);
  
              return row.setMetadata(this.metadata);
          }
  
          return null;
      }
  
      @Override
      public void remove() {
          this.rows.remove(getPosition());
      }
  
      @Override
      public void setCurrentRow(int newIndex) {
          this.currentPositionInFetchedRows = newIndex;
      }
  
      @Override
      public int size() {
          return this.rows.size();
      }
  
      @Override
      public boolean wasEmpty() {
          return (this.rows != null && this.rows.size() == 0);
      }
  }
  