content: /*
   * Copyright (c) 2015, 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.x;
  
  import java.util.NoSuchElementException;
  import java.util.function.Consumer;
  
  import com.mysql.cj.protocol.ColumnDefinition;
  import com.mysql.cj.result.Row;
  import com.mysql.cj.result.RowList;
  
  public class XProtocolRowInputStream implements RowList {
      private ColumnDefinition metadata;
      private XProtocol protocol;
      private boolean isDone = false;
      private int position = -1;
      /** XProtocolRow */
      private Row next; // TODO document
      private Consumer<Notice> noticeConsumer;
  
      public XProtocolRowInputStream(ColumnDefinition metadata, XProtocol protocol, Consumer<Notice> noticeConsumer) {
          this.metadata = metadata;
          this.protocol = protocol;
          this.noticeConsumer = noticeConsumer;
      }
  
      public XProtocolRowInputStream(ColumnDefinition metadata, Row row, XProtocol protocol, Consumer<Notice> noticeConsumer) {
          this.metadata = metadata;
          this.protocol = protocol;
          this.next = row;
          this.next.setMetadata(metadata);
          this.noticeConsumer = noticeConsumer;
      }
  
      public Row readRow() {
          if (!hasNext()) {
              this.isDone = true;
              return null;
          }
          this.position++;
          Row r = this.next;
          this.next = null;
          return r;
      }
  
      public Row next() {
          if (!hasNext()) {
              throw new NoSuchElementException();
          }
          return readRow();
      }
  
      public boolean hasNext() {
          if (this.isDone) {
              return false;
          } else if (this.next == null) {
              this.next = this.protocol.readRowOrNull(this.metadata, this.noticeConsumer);
          }
          return this.next != null;
      }
  
      public int getPosition() {
          return this.position;
      }
  }
  