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   /*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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.netty.handler.codec;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.Unpooled;
  
  /**
   * A set of commonly used delimiters for {@link DelimiterBasedFrameDecoder}.
   */
  public final class Delimiters {
  
      /**
       * Returns a {@code NUL (0x00)} delimiter, which could be used for
       * Flash XML socket or any similar protocols.
       */
      public static ByteBuf[] nulDelimiter() {
          return new ByteBuf[] {
                  Unpooled.wrappedBuffer(new byte[] { 0 }) };
      }
  
      /**
       * Returns {@code CR ('\r')} and {@code LF ('\n')} delimiters, which could
       * be used for text-based line protocols.
       */
      public static ByteBuf[] lineDelimiter() {
          return new ByteBuf[] {
                  Unpooled.wrappedBuffer(new byte[] { '\r', '\n' }),
                  Unpooled.wrappedBuffer(new byte[] { '\n' }),
          };
      }
  
      private Delimiters() {
          // Unused
      }
  }