content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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.
   */
  
  package io.activej.multilog;
  
  import java.util.Objects;
  
  public final class LogPosition implements Comparable<LogPosition> {
  	private static final LogPosition INITIAL_LOG_POSITION = new LogPosition(new LogFile("", 0), 0);
  
  	private final LogFile logFile;
  	private final long position;
  
  	private LogPosition(LogFile logFile, long position) {
  		this.logFile = logFile;
  		this.position = position;
  	}
  
  	public static LogPosition create(LogFile logFile, long position) {
  		return new LogPosition(logFile, position);
  	}
  
  	public static LogPosition initial() {
  		return INITIAL_LOG_POSITION;
  	}
  
  	public boolean isBeginning() {
  		return position == 0L;
  	}
  
  	public boolean isInitial() {
  		return INITIAL_LOG_POSITION.equals(this);
  	}
  
  	public LogFile getLogFile() {
  		return logFile;
  	}
  
  	public long getPosition() {
  		return position;
  	}
  
  	@Override
  	public boolean equals(Object o) {
  		if (this == o) return true;
  		if (o == null || getClass() != o.getClass()) return false;
  		LogPosition that = (LogPosition) o;
  		if (position != that.position) return false;
  		return Objects.equals(logFile, that.logFile);
  	}
  
  	@Override
  	public int hashCode() {
  		return 31 * logFile.hashCode() + (int) (position ^ (position >>> 32));
  	}
  
  	@Override
  	public String toString() {
  		return "LogPosition{logFile=" + logFile + ", position=" + position + '}';
  	}
  
  	@Override
  	public int compareTo(LogPosition o) {
  		int result = this.logFile.compareTo(o.logFile);
  		return result != 0 ? result : Long.compare(this.position, o.position);
  	}
  }
  