/*
 * 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.
 */

package org.apache.iotdb.db.schemaengine.schemaregion.logfile;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class MLogDescriptionReader {

  private final File file;

  public MLogDescriptionReader(String schemaDir, String logFileName) {
    file = new File(schemaDir, logFileName);
  }

  private MLogDescription deserializeMLogDescription() throws IOException {
    try (FileInputStream fileInputStream = new FileInputStream(file)) {
      MLogDescription mlogdescription = new MLogDescription();
      mlogdescription.deserialize(fileInputStream);
      return mlogdescription;
    }
  }

  public long readCheckPoint() throws IOException {
    MLogDescription mlogdescription = deserializeMLogDescription();
    return mlogdescription.getCheckPoint();
  }
}
