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    1   /*
    2    * Copyright 2009 Red Hat, Inc.
    3    *
    4    * Red Hat licenses this file to you under the Apache License, version 2.0
    5    * (the "License"); you may not use this file except in compliance with the
    6    * License.  You may obtain a copy of the License at:
    7    *
    8    *    http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.handler.codec.frame;
    17
    18  import org.jboss.netty.buffer.ChannelBuffer;
    19  import org.jboss.netty.buffer.ChannelBuffers;
    20
    21  /**
    22   * A set of commonly used delimiters for {@link DelimiterBasedFrameDecoder}.
    23   *
    24   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    25   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
    26   *
    27   * @version $Rev:231 $, $Date:2008-06-12 16:44:50 +0900 (목, 12 6월 2008) $
    28   *
    29   */
    30  public class Delimiters {
    31
    32      /**
    33       * Returns a {@code NUL (0x00)} delimiter, which could be used for
    34       * Flash XML socket or any similar protocols.
    35       */
    36      public static ChannelBuffer[] nulDelimiter() {
    37          return new ChannelBuffer[] {
    38                  ChannelBuffers.wrappedBuffer(new byte[] { 0 }) };
    39      }
    40
    41      /**
    42       * Returns {@code CR ('\r')} and {@code LF ('\n')} delimiters, which could
    43       * be used for text-based line protocols.
    44       */
    45      public static ChannelBuffer[] lineDelimiter() {
    46          return new ChannelBuffer[] {
    47                  ChannelBuffers.wrappedBuffer(new byte[] { '\r', '\n' }),
    48                  ChannelBuffers.wrappedBuffer(new byte[] { '\n' }),
    49          };
    50      }
    51
    52      private Delimiters() {
    53          // Unused
    54      }
    55  }