Class BigIntegerDecoder
- java.lang.Object
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- org.jboss.netty.channel.SimpleChannelUpstreamHandler
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- org.jboss.netty.handler.codec.frame.FrameDecoder
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- org.jboss.netty.example.factorial.BigIntegerDecoder
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- All Implemented Interfaces:
ChannelHandler
,ChannelUpstreamHandler
,LifeCycleAwareChannelHandler
public class BigIntegerDecoder extends FrameDecoder
Decodes the binary representation of aBigInteger
prepended with a magic number ('F' or 0x46) and a 32-bit integer length prefix into aBigInteger
instance. For example, { 'F', 0, 0, 0, 1, 42 } will be decoded into new BigInteger("42").
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Nested Class Summary
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Nested classes/interfaces inherited from interface org.jboss.netty.channel.ChannelHandler
ChannelHandler.Sharable
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Field Summary
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Fields inherited from class org.jboss.netty.handler.codec.frame.FrameDecoder
cumulation, DEFAULT_MAX_COMPOSITEBUFFER_COMPONENTS
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Constructor Summary
Constructors Constructor Description BigIntegerDecoder()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected java.lang.Object
decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer)
Decodes the received packets so far into a frame.-
Methods inherited from class org.jboss.netty.handler.codec.frame.FrameDecoder
actualReadableBytes, afterAdd, afterRemove, appendToCumulation, beforeAdd, beforeRemove, channelClosed, channelDisconnected, cleanup, decodeLast, exceptionCaught, extractFrame, getMaxCumulationBufferCapacity, getMaxCumulationBufferComponents, internalBuffer, isUnfold, messageReceived, newCumulationBuffer, replace, setMaxCumulationBufferCapacity, setMaxCumulationBufferComponents, setUnfold, unfoldAndFireMessageReceived, updateCumulation
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Methods inherited from class org.jboss.netty.channel.SimpleChannelUpstreamHandler
channelBound, channelConnected, channelInterestChanged, channelOpen, channelUnbound, childChannelClosed, childChannelOpen, handleUpstream, writeComplete
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Method Detail
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decode
protected java.lang.Object decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer) throws java.lang.Exception
Description copied from class:FrameDecoder
Decodes the received packets so far into a frame. If an sub-class wants to extract a frame out of the buffer it should use theFrameDecoder.extractFrame(ChannelBuffer, int, int)
method, to make optimizations easier later.- Specified by:
decode
in classFrameDecoder
- Parameters:
ctx
- the context of this handlerchannel
- the current channelbuffer
- the cumulative buffer of received packets so far. Note that the buffer might be empty, which means you should not make an assumption that the buffer contains at least one byte in your decoder implementation.- Returns:
- the decoded frame if a full frame was received and decoded.
null
if there's not enough data in the buffer to decode a frame. - Throws:
java.lang.Exception
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