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.alipay.remoting;
  
  import java.util.Arrays;
  
  /**
   * Protocol code definition, you can define your own protocol code in byte array {@link ProtocolCode#version}
   * We suggest to use just one byte for simplicity.
   *
   * @author tsui
   * @version $Id: ProtocolCode.java, v 0.1 2018-03-27 17:23 tsui Exp $
   */
  public class ProtocolCode {
      /** bytes to represent protocol code */
      byte[] version;
  
      private ProtocolCode(byte... version) {
          this.version = version;
      }
  
      public static ProtocolCode fromBytes(byte... version) {
          return new ProtocolCode(version);
      }
  
      /**
       * get the first single byte if your protocol code is single code.
       * @return
       */
      public byte getFirstByte() {
          return this.version[0];
      }
  
      public int length() {
          return this.version.length;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
          ProtocolCode that = (ProtocolCode) o;
          return Arrays.equals(version, that.version);
      }
  
      @Override
      public int hashCode() {
          return Arrays.hashCode(version);
      }
  
      @Override
      public String toString() {
          return "ProtocolVersion{" + "version=" + Arrays.toString(version) + '}';
      }
  }
  