org.apache.mina.filter.codec.statemachine
Class SingleByteDecodingState

java.lang.Object
  org.apache.mina.filter.codec.statemachine.SingleByteDecodingState

All Implemented Interfaces:

DecodingState

public abstract class SingleByteDecodingState
extends Object
implements DecodingState

DecodingState which decodes byte values.

Author:

Apache MINA Project

Constructor Summary

SingleByteDecodingState()

Method Summary

DecodingState	decode(IoBuffer in, ProtocolDecoderOutput out) Invoked when data is available for this state.
protected abstract DecodingState	finishDecode(byte b, ProtocolDecoderOutput out) Invoked when this state has consumed a complete byte.
DecodingState	finishDecode(ProtocolDecoderOutput out) Invoked when the associated IoSession is closed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SingleByteDecodingState

public SingleByteDecodingState()

Method Detail

decode

public DecodingState decode(IoBuffer in,
                            ProtocolDecoderOutput out)
                     throws Exception

Description copied from interface: DecodingState

Invoked when data is available for this state.

Specified by:

decode in interface DecodingState

Parameters:

in - the data to be decoded.

out - used to write decoded objects.

Returns:

the next state if a state transition was triggered (use this for loop transitions) or null if the state machine has reached its end.

Throws:

Exception - if the read data violated protocol specification.

finishDecode

public DecodingState finishDecode(ProtocolDecoderOutput out)
                           throws Exception

Invoked when the associated IoSession is closed. This method is useful when you deal with protocols which don't specify the length of a message (e.g. HTTP responses without content-length header). Implement this method to process the remaining data that DecodingState.decode(IoBuffer, ProtocolDecoderOutput) method didn't process completely.

Specified by:

finishDecode in interface DecodingState

Parameters:

out - used to write decoded objects.

Returns:

the next state if a state transition was triggered (use this for loop transitions) or null if the state machine has reached its end.

Throws:

Exception - if the read data violated protocol specification.

finishDecode

protected abstract DecodingState finishDecode(byte b,
                                              ProtocolDecoderOutput out)
                                       throws Exception

Invoked when this state has consumed a complete byte.

Parameters:

b - the byte.

out - the current ProtocolDecoderOutput used to write decoded messages.

Returns:

the next state if a state transition was triggered (use this for loop transitions) or null if the state machine has reached its end.

Throws:

Exception - if the read data violated protocol specification.