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 com.datastax.oss.driver.internal.core;
  
  import com.datastax.oss.driver.api.core.ProtocolVersion;
  
  /**
   * A marker interface for features of the native protocol that are only supported by specific
   * {@linkplain ProtocolVersion versions}.
   *
   * <p>The only reason to model this as an interface (as opposed to an enum type) is to accommodate
   * for custom protocol extensions. If you're connecting to a standard Apache Cassandra cluster, all
   * {@code ProtocolFeature}s are {@link DefaultProtocolFeature} instances.
   *
   * @see ProtocolVersionRegistry#supports(ProtocolVersion, ProtocolFeature)
   * @see DefaultProtocolFeature
   */
  public interface ProtocolFeature {}
  