text: /***************************************************************************
   *
   * Copyright (c) 2013 Baidu, Inc. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   **************************************************************************/
  // Author: Wen Xiang <wenxiang@baidu.com>
  //
  // Interface.
  
  #ifndef FLUME_RUNTIME_EXECUTOR_FACTORY_H_
  #define FLUME_RUNTIME_EXECUTOR_FACTORY_H_
  
  #include <vector>
  
  #include "flume/runtime/dataset.h"
  #include "flume/runtime/executor.h"
  #include "flume/runtime/backend.h"
  
  namespace baidu {
  namespace flume {
  
  class PbExecutor;  // flume/proto/physical_plan.proto
  
  namespace runtime {
  
  class ExecutorFactory {
  public:
      ExecutorFactory() : m_backend(NULL) { }
      virtual ~ExecutorFactory() {}
  
      void SetBackend(Backend *backend) { m_backend = backend; }
  
      virtual Executor* CreateExecutor(
              const PbExecutor& message,
              uint32_t scope_level,
              const std::vector<Executor*>& childs) = 0;
  
  public:
      static Executor* CreateCommonExecutor(
              const PbExecutor& message,
              uint32_t scope_level,
              const std::vector<Executor*>& childs,
              DatasetManager* dataset_manager);
  private:
      Backend *m_backend;
  };
  
  }  // namespace runtime
  }  // namespace flume
  }  // namespace baidu
  
  #endif  // FLUME_RUNTIME_EXECUTOR_FACTORY_H_
  