metadata_scan_task.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
 
#pragma once
 
#include <memory>
 
#include "iceberg/iceberg_export.h"
#include "iceberg/result.h"
#include "iceberg/type_fwd.h"
 
namespace iceberg {
 
class ICEBERG_EXPORT MetadataScanTask {
 public:
  enum class TaskKind {
    kStatic,
  };
 
  virtual ~MetadataScanTask() = default;
 
  virtual TaskKind task_kind() const = 0;
 
  virtual MetadataTableKind table_kind() const = 0;
};
 
class ICEBERG_EXPORT StaticMetadataTask : public MetadataScanTask {
 public:
  static Result<std::shared_ptr<StaticMetadataTask>> Make(
      MetadataTableKind table_kind, std::shared_ptr<const TableMetadata> metadata,
      std::shared_ptr<Schema> projected_schema);
 
  TaskKind task_kind() const override { return TaskKind::kStatic; }
 
  MetadataTableKind table_kind() const override { return table_kind_; }
 
  const std::shared_ptr<const TableMetadata>& metadata() const { return metadata_; }
 
  const std::shared_ptr<Schema>& projected_schema() const { return projected_schema_; }
 
 private:
  StaticMetadataTask(MetadataTableKind table_kind,
                     std::shared_ptr<const TableMetadata> metadata,
                     std::shared_ptr<Schema> projected_schema);
 
  const MetadataTableKind table_kind_;
  const std::shared_ptr<const TableMetadata> metadata_;
  const std::shared_ptr<Schema> projected_schema_;
};
 
}  // namespace iceberg