1   /* Copyright 2002-2025 CS GROUP
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *   http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.orekit.gnss.metric.parser;
18  
19  /** Interface for getting bits forming encoded messages.
20   * <p>
21   * Classes implementing this interface must contain exactly one complete message.
22   * </p>
23   * @author Luc Maisonobe
24   * @since 11.0
25   */
26  public interface EncodedMessage {
27  
28      /** Start message extraction.
29       */
30      default void start() {
31          // nothing by default
32      }
33  
34      /** Extract the next n bits from the encoded message.
35       * @param n number of bits to extract (cannot exceed 32 bits)
36       * @return bits packed as the LSB of a 64 bits primitive long
37       */
38      long extractBits(int n);
39  
40  }