http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public abstract class io.netty.handler.codec.ByteToMessageCodec<I> extends io.netty.channel.ChannelDuplexHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: io.netty.handler.codec.ByteToMessageCodec
  super_class: io.netty.channel.ChannelDuplexHandler
{
  private final io.netty.util.internal.TypeParameterMatcher outboundMsgMatcher;
    descriptor: Lio/netty/util/internal/TypeParameterMatcher;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final io.netty.handler.codec.MessageToByteEncoder<I> encoder;
    descriptor: Lio/netty/handler/codec/MessageToByteEncoder;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lio/netty/handler/codec/MessageToByteEncoder<TI;>;

  private final io.netty.handler.codec.ByteToMessageDecoder decoder;
    descriptor: Lio/netty/handler/codec/ByteToMessageDecoder;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  protected void <init>();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
         0: .line 55
            aload 0 /* this */
            iconst_1
            invokespecial io.netty.handler.codec.ByteToMessageCodec.<init>:(Z)V
         1: .line 56
            return
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;

  protected void <init>(java.lang.Class<? extends I>);
    descriptor: (Ljava/lang/Class;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // java.lang.Class outboundMessageType
         0: .line 62
            aload 0 /* this */
            aload 1 /* outboundMessageType */
            iconst_1
            invokespecial io.netty.handler.codec.ByteToMessageCodec.<init>:(Ljava/lang/Class;Z)V
         1: .line 63
            return
        end local 1 // java.lang.Class outboundMessageType
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0    2     0                 this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    2     1  outboundMessageType  Ljava/lang/Class<+TI;>;
    Signature: (Ljava/lang/Class<+TI;>;)V
    MethodParameters:
                     Name  Flags
      outboundMessageType  

  protected void <init>(boolean);
    descriptor: (Z)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // boolean preferDirect
         0: .line 72
            aload 0 /* this */
            invokespecial io.netty.channel.ChannelDuplexHandler.<init>:()V
         1: .line 39
            aload 0 /* this */
            new io.netty.handler.codec.ByteToMessageCodec$1
            dup
            aload 0 /* this */
            invokespecial io.netty.handler.codec.ByteToMessageCodec$1.<init>:(Lio/netty/handler/codec/ByteToMessageCodec;)V
            putfield io.netty.handler.codec.ByteToMessageCodec.decoder:Lio/netty/handler/codec/ByteToMessageDecoder;
         2: .line 73
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.ByteToMessageCodec.ensureNotSharable:()V
         3: .line 74
            aload 0 /* this */
            aload 0 /* this */
            ldc Lio/netty/handler/codec/ByteToMessageCodec;
            ldc "I"
            invokestatic io.netty.util.internal.TypeParameterMatcher.find:(Ljava/lang/Object;Ljava/lang/Class;Ljava/lang/String;)Lio/netty/util/internal/TypeParameterMatcher;
            putfield io.netty.handler.codec.ByteToMessageCodec.outboundMsgMatcher:Lio/netty/util/internal/TypeParameterMatcher;
         4: .line 75
            aload 0 /* this */
            new io.netty.handler.codec.ByteToMessageCodec$Encoder
            dup
            aload 0 /* this */
            iload 1 /* preferDirect */
            invokespecial io.netty.handler.codec.ByteToMessageCodec$Encoder.<init>:(Lio/netty/handler/codec/ByteToMessageCodec;Z)V
            putfield io.netty.handler.codec.ByteToMessageCodec.encoder:Lio/netty/handler/codec/MessageToByteEncoder;
         5: .line 76
            return
        end local 1 // boolean preferDirect
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    6     0          this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    6     1  preferDirect  Z
    MethodParameters:
              Name  Flags
      preferDirect  

  protected void <init>(java.lang.Class<? extends I>, );
    descriptor: (Ljava/lang/Class;Z)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // java.lang.Class outboundMessageType
        start local 2 // boolean preferDirect
         0: .line 86
            aload 0 /* this */
            invokespecial io.netty.channel.ChannelDuplexHandler.<init>:()V
         1: .line 39
            aload 0 /* this */
            new io.netty.handler.codec.ByteToMessageCodec$1
            dup
            aload 0 /* this */
            invokespecial io.netty.handler.codec.ByteToMessageCodec$1.<init>:(Lio/netty/handler/codec/ByteToMessageCodec;)V
            putfield io.netty.handler.codec.ByteToMessageCodec.decoder:Lio/netty/handler/codec/ByteToMessageDecoder;
         2: .line 87
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.ByteToMessageCodec.ensureNotSharable:()V
         3: .line 88
            aload 0 /* this */
            aload 1 /* outboundMessageType */
            invokestatic io.netty.util.internal.TypeParameterMatcher.get:(Ljava/lang/Class;)Lio/netty/util/internal/TypeParameterMatcher;
            putfield io.netty.handler.codec.ByteToMessageCodec.outboundMsgMatcher:Lio/netty/util/internal/TypeParameterMatcher;
         4: .line 89
            aload 0 /* this */
            new io.netty.handler.codec.ByteToMessageCodec$Encoder
            dup
            aload 0 /* this */
            iload 2 /* preferDirect */
            invokespecial io.netty.handler.codec.ByteToMessageCodec$Encoder.<init>:(Lio/netty/handler/codec/ByteToMessageCodec;Z)V
            putfield io.netty.handler.codec.ByteToMessageCodec.encoder:Lio/netty/handler/codec/MessageToByteEncoder;
         5: .line 90
            return
        end local 2 // boolean preferDirect
        end local 1 // java.lang.Class outboundMessageType
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0    6     0                 this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    6     1  outboundMessageType  Ljava/lang/Class<+TI;>;
            0    6     2         preferDirect  Z
    Signature: (Ljava/lang/Class<+TI;>;Z)V
    MethodParameters:
                     Name  Flags
      outboundMessageType  
      preferDirect         

  public boolean acceptOutboundMessage(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // java.lang.Object msg
         0: .line 98
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.outboundMsgMatcher:Lio/netty/util/internal/TypeParameterMatcher;
            aload 1 /* msg */
            invokevirtual io.netty.util.internal.TypeParameterMatcher.match:(Ljava/lang/Object;)Z
            ireturn
        end local 1 // java.lang.Object msg
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    1     1   msg  Ljava/lang/Object;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      msg   

  public void channelRead(io.netty.channel.ChannelHandlerContext, java.lang.Object);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Object msg
         0: .line 103
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.decoder:Lio/netty/handler/codec/ByteToMessageDecoder;
            aload 1 /* ctx */
            aload 2 /* msg */
            invokevirtual io.netty.handler.codec.ByteToMessageDecoder.channelRead:(Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;)V
         1: .line 104
            return
        end local 2 // java.lang.Object msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    2     1   ctx  Lio/netty/channel/ChannelHandlerContext;
            0    2     2   msg  Ljava/lang/Object;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   
      msg   

  public void write(io.netty.channel.ChannelHandlerContext, java.lang.Object, io.netty.channel.ChannelPromise);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Lio/netty/channel/ChannelPromise;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Object msg
        start local 3 // io.netty.channel.ChannelPromise promise
         0: .line 108
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.encoder:Lio/netty/handler/codec/MessageToByteEncoder;
            aload 1 /* ctx */
            aload 2 /* msg */
            aload 3 /* promise */
            invokevirtual io.netty.handler.codec.MessageToByteEncoder.write:(Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Lio/netty/channel/ChannelPromise;)V
         1: .line 109
            return
        end local 3 // io.netty.channel.ChannelPromise promise
        end local 2 // java.lang.Object msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    2     0     this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    2     1      ctx  Lio/netty/channel/ChannelHandlerContext;
            0    2     2      msg  Ljava/lang/Object;
            0    2     3  promise  Lio/netty/channel/ChannelPromise;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
         Name  Flags
      ctx      
      msg      
      promise  

  public void channelReadComplete(io.netty.channel.ChannelHandlerContext);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
         0: .line 113
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.decoder:Lio/netty/handler/codec/ByteToMessageDecoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.ByteToMessageDecoder.channelReadComplete:(Lio/netty/channel/ChannelHandlerContext;)V
         1: .line 114
            return
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    2     1   ctx  Lio/netty/channel/ChannelHandlerContext;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   

  public void channelInactive(io.netty.channel.ChannelHandlerContext);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
         0: .line 118
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.decoder:Lio/netty/handler/codec/ByteToMessageDecoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.ByteToMessageDecoder.channelInactive:(Lio/netty/channel/ChannelHandlerContext;)V
         1: .line 119
            return
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    2     1   ctx  Lio/netty/channel/ChannelHandlerContext;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   

  public void handlerAdded(io.netty.channel.ChannelHandlerContext);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
         0: .line 124
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.decoder:Lio/netty/handler/codec/ByteToMessageDecoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.ByteToMessageDecoder.handlerAdded:(Lio/netty/channel/ChannelHandlerContext;)V
         1: .line 125
            goto 5
      StackMap locals:
      StackMap stack: java.lang.Throwable
         2: astore 2
         3: .line 126
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.encoder:Lio/netty/handler/codec/MessageToByteEncoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.MessageToByteEncoder.handlerAdded:(Lio/netty/channel/ChannelHandlerContext;)V
         4: .line 127
            aload 2
            athrow
         5: .line 126
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.encoder:Lio/netty/handler/codec/MessageToByteEncoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.MessageToByteEncoder.handlerAdded:(Lio/netty/channel/ChannelHandlerContext;)V
         6: .line 128
            return
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    7     1   ctx  Lio/netty/channel/ChannelHandlerContext;
      Exception table:
        from    to  target  type
           0     2       2  any
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   

  public void handlerRemoved(io.netty.channel.ChannelHandlerContext);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
         0: .line 133
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.decoder:Lio/netty/handler/codec/ByteToMessageDecoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.ByteToMessageDecoder.handlerRemoved:(Lio/netty/channel/ChannelHandlerContext;)V
         1: .line 134
            goto 5
      StackMap locals:
      StackMap stack: java.lang.Throwable
         2: astore 2
         3: .line 135
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.encoder:Lio/netty/handler/codec/MessageToByteEncoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.MessageToByteEncoder.handlerRemoved:(Lio/netty/channel/ChannelHandlerContext;)V
         4: .line 136
            aload 2
            athrow
         5: .line 135
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.netty.handler.codec.ByteToMessageCodec.encoder:Lio/netty/handler/codec/MessageToByteEncoder;
            aload 1 /* ctx */
            invokevirtual io.netty.handler.codec.MessageToByteEncoder.handlerRemoved:(Lio/netty/channel/ChannelHandlerContext;)V
         6: .line 137
            return
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    7     1   ctx  Lio/netty/channel/ChannelHandlerContext;
      Exception table:
        from    to  target  type
           0     2       2  any
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   

  protected abstract void encode(io.netty.channel.ChannelHandlerContext, I, io.netty.buffer.ByteBuf);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Lio/netty/buffer/ByteBuf;)V
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    Exceptions:
      throws java.lang.Exception
    Signature: (Lio/netty/channel/ChannelHandlerContext;TI;Lio/netty/buffer/ByteBuf;)V
    MethodParameters:
      Name  Flags
      ctx   
      msg   
      out   

  protected abstract void decode(io.netty.channel.ChannelHandlerContext, io.netty.buffer.ByteBuf, java.util.List<java.lang.Object>);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;Ljava/util/List;)V
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    Exceptions:
      throws java.lang.Exception
    Signature: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;Ljava/util/List<Ljava/lang/Object;>;)V
    MethodParameters:
      Name  Flags
      ctx   
      in    
      out   

  protected void decodeLast(io.netty.channel.ChannelHandlerContext, io.netty.buffer.ByteBuf, java.util.List<java.lang.Object>);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;Ljava/util/List;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // io.netty.handler.codec.ByteToMessageCodec this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // io.netty.buffer.ByteBuf in
        start local 3 // java.util.List out
         0: .line 153
            aload 2 /* in */
            invokevirtual io.netty.buffer.ByteBuf.isReadable:()Z
            ifeq 2
         1: .line 156
            aload 0 /* this */
            aload 1 /* ctx */
            aload 2 /* in */
            aload 3 /* out */
            invokevirtual io.netty.handler.codec.ByteToMessageCodec.decode:(Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;Ljava/util/List;)V
         2: .line 158
      StackMap locals:
      StackMap stack:
            return
        end local 3 // java.util.List out
        end local 2 // io.netty.buffer.ByteBuf in
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.ByteToMessageCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/netty/handler/codec/ByteToMessageCodec<TI;>;
            0    3     1   ctx  Lio/netty/channel/ChannelHandlerContext;
            0    3     2    in  Lio/netty/buffer/ByteBuf;
            0    3     3   out  Ljava/util/List<Ljava/lang/Object;>;
    Exceptions:
      throws java.lang.Exception
    Signature: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/buffer/ByteBuf;Ljava/util/List<Ljava/lang/Object;>;)V
    MethodParameters:
      Name  Flags
      ctx   
      in    
      out   
}
Signature: <I:Ljava/lang/Object;>Lio/netty/channel/ChannelDuplexHandler;
SourceFile: "ByteToMessageCodec.java"
NestMembers:
  io.netty.handler.codec.ByteToMessageCodec$1  io.netty.handler.codec.ByteToMessageCodec$Encoder
InnerClasses:
  io.netty.handler.codec.ByteToMessageCodec$1
  private final Encoder = io.netty.handler.codec.ByteToMessageCodec$Encoder of io.netty.handler.codec.ByteToMessageCodec