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.HashMap;
  import java.util.Map;
  import java.util.concurrent.CompletableFuture;
  
  import com.google.protobuf.GeneratedMessageV3;
  import com.mysql.cj.exceptions.WrongArgumentException;
  import com.mysql.cj.protocol.MessageListener;
  import com.mysql.cj.protocol.ProtocolEntity;
  import com.mysql.cj.protocol.ProtocolEntityFactory;
  import com.mysql.cj.protocol.ResultBuilder;
  import com.mysql.cj.x.protobuf.Mysqlx.Error;
  
  /**
   * A {@link MessageListener} to handle result data and propagate it to a {@link ResultBuilder}.
   */
  public class ResultMessageListener<R> implements MessageListener<XMessage> {
      private ResultBuilder<?> resultBuilder;
      private CompletableFuture<R> future;
  
      private Map<Class<? extends GeneratedMessageV3>, ProtocolEntityFactory<? extends ProtocolEntity, XMessage>> messageToProtocolEntityFactory = new HashMap<>();
  
      public ResultMessageListener(
              Map<Class<? extends GeneratedMessageV3>, ProtocolEntityFactory<? extends ProtocolEntity, XMessage>> messageToProtocolEntityFactory,
              ResultBuilder<R> resultBuilder, CompletableFuture<R> future) {
          this.messageToProtocolEntityFactory = messageToProtocolEntityFactory;
          this.resultBuilder = resultBuilder;
          this.future = future;
      }
  
      @SuppressWarnings("unchecked")
      public boolean processMessage(XMessage message) {
          Class<? extends GeneratedMessageV3> msgClass = (Class<? extends GeneratedMessageV3>) message.getMessage().getClass();
  
          if (Error.class.equals(msgClass)) {
              this.future.completeExceptionally(new XProtocolError(Error.class.cast(message.getMessage())));
  
          } else if (!this.messageToProtocolEntityFactory.containsKey(msgClass)) {
              this.future.completeExceptionally(new WrongArgumentException("Unhandled msg class (" + msgClass + ") + msg=" + message.getMessage()));
  
          } else {
              if (!this.resultBuilder.addProtocolEntity(this.messageToProtocolEntityFactory.get(msgClass).createFromMessage(message))) {
                  return false;
              }
              this.future.complete((R) this.resultBuilder.build());
          }
  
          return true; /* done reading */
      }
  
      public void error(Throwable ex) {
          this.future.completeExceptionally(ex);
      }
  
  }
  