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1   /*
2    * Copyright 2014 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the 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 io.netty.handler.codec;
17  
18  import io.netty.channel.ChannelHandlerAdapter;
19  
20  final class CodecUtil {
21  
22      /**
23       * Throws {@link IllegalStateException} if {@link ChannelHandlerAdapter#isSharable()} returns {@code true}
24       */
25      static void ensureNotSharable(ChannelHandlerAdapter handler) {
26          if (handler.isSharable()) {
27              throw new IllegalStateException("@Sharable annotation is not allowed");
28          }
29      }
30  
31      private CodecUtil() { }
32  }