/*
    * 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:
    *
    *   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 io.netty.handler.codec;
  
  /**
   * Thrown if an unsupported message is received by an codec.
   */
  public class UnsupportedMessageTypeException extends CodecException {
  
      private static final long serialVersionUID = 2799598826487038726L;
  
      public UnsupportedMessageTypeException(
              Object message, Class<?>... expectedTypes) {
          super(message(
                  message == null? "null" : message.getClass().getName(), expectedTypes));
      }
  
      public UnsupportedMessageTypeException() { }
  
      public UnsupportedMessageTypeException(String message, Throwable cause) {
          super(message, cause);
      }
  
      public UnsupportedMessageTypeException(String s) {
          super(s);
      }
  
      public UnsupportedMessageTypeException(Throwable cause) {
          super(cause);
      }
  
      private static String message(
              String actualType, Class<?>... expectedTypes) {
          StringBuilder buf = new StringBuilder(actualType);
  
          if (expectedTypes != null && expectedTypes.length > 0) {
              buf.append(" (expected: ").append(expectedTypes[0].getName());
              for (int i = 1; i < expectedTypes.length; i ++) {
                  Class<?> t = expectedTypes[i];
                  if (t == null) {
                      break;
                  }
                  buf.append(", ").append(t.getName());
              }
              buf.append(')');
          }
  
          return buf.toString();
      }
  }