// 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 "exec/scan/scanner.h"

namespace doris {

class Scanner;

class VSlotRef;

// We want to close scanner automatically, so using a delegate class

// and call close method in the delegate class's destructor.

class ScannerDelegate {

public:

    ScannerSPtr _scanner;

    ScannerDelegate(ScannerSPtr& scanner_ptr) : _scanner(scanner_ptr) {}

    ~ScannerDelegate() {

        SCOPED_SWITCH_THREAD_MEM_TRACKER_LIMITER(_scanner->runtime_state()->query_mem_tracker());

        Status st = _scanner->close(_scanner->runtime_state());

        if (!st.ok()) {

            LOG(WARNING) << "close scanner failed, st = " << st;

        }

        _scanner.reset();

    }

    ScannerDelegate(ScannerDelegate&&) = delete;

};

} // namespace doris