content: /*
   * Copyright (c) 2019, 2021, 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.xdevapi;
  
  import java.util.ArrayList;
  
  import com.mysql.cj.MysqlxSession;
  import com.mysql.cj.conf.PropertySet;
  import com.mysql.cj.protocol.ColumnDefinition;
  import com.mysql.cj.protocol.ProtocolEntity;
  import com.mysql.cj.protocol.ResultBuilder;
  import com.mysql.cj.protocol.x.Notice;
  import com.mysql.cj.protocol.x.StatementExecuteOkBuilder;
  import com.mysql.cj.protocol.x.XProtocol;
  import com.mysql.cj.protocol.x.XProtocolRowInputStream;
  import com.mysql.cj.result.DefaultColumnDefinition;
  import com.mysql.cj.result.Field;
  import com.mysql.cj.result.Row;
  import com.mysql.cj.result.RowList;
  
  /**
   * Result builder producing a streaming {@link DocResult} instance.
   */
  public class StreamingDocResultBuilder implements ResultBuilder<DocResult> {
      private ArrayList<Field> fields = new ArrayList<>();
      private ColumnDefinition metadata;
      private RowList rowList = null;
  
      PropertySet pset;
      XProtocol protocol;
      private StatementExecuteOkBuilder statementExecuteOkBuilder = new StatementExecuteOkBuilder();
  
      public StreamingDocResultBuilder(MysqlxSession sess) {
          this.pset = sess.getPropertySet();
          this.protocol = sess.getProtocol();
      }
  
      @Override
      public boolean addProtocolEntity(ProtocolEntity entity) {
          if (entity instanceof Field) {
              this.fields.add((Field) entity);
              return false;
  
          } else if (entity instanceof Notice) {
              this.statementExecuteOkBuilder.addProtocolEntity(entity);
              return false;
          }
  
          if (this.metadata == null) {
              this.metadata = new DefaultColumnDefinition(this.fields.toArray(new Field[] {}));
          }
  
          this.rowList = entity instanceof Row ? new XProtocolRowInputStream(this.metadata, (Row) entity, this.protocol, (n) -> {
              this.statementExecuteOkBuilder.addProtocolEntity(n);
          }) : new XProtocolRowInputStream(this.metadata, this.protocol, (n) -> {
              this.statementExecuteOkBuilder.addProtocolEntity(n);
          });
  
          return true;
      }
  
      @Override
      public DocResult build() {
          return new DocResultImpl(this.rowList, () -> {
              return this.protocol.readQueryResult(this.statementExecuteOkBuilder);
          }, this.pset);
      }
  }
  