content: /*
   * 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.bifromq.util;
  
  /**
   * The constant elements in MQTT Topics and TopicFilters.
   */
  public class TopicConst {
      public static final char NUL_CHAR = '\u0000';
      public static final char DELIMITER_CHAR = '/';
      public static final char SINGLE_WILDCARD_CHAR = '+';
      public static final char MULTIPLE_WILDCARD_CHAR = '#';
      public static final String NUL = "\u0000";
      public static final String DELIMITER = "/";
      public static final String SYS_PREFIX = "$";
      public static final String SINGLE_WILDCARD = "+";
      public static final String MULTI_WILDCARD = "#";
      public static final String UNORDERED_SHARE = "$share";
      public static final String ORDERED_SHARE = "$oshare";
  }
  