/**
* Read a PeerAddress from a Netty buffer. I did not want to include ChannelBuffer in the class
* PeerAddress
*
* @param buffer The Netty buffer
* @return A PeerAddress created from the buffer (deserialized)
*/
private static PeerAddress readPeerAddress(final ChannelBuffer buffer) {
if (buffer.readableBytes() < 21) return null;
Number160 id = readID(buffer);
// peek
int type = buffer.getUnsignedByte(buffer.readerIndex());
// now we know the length
int len = PeerAddress.expectedSocketLength(type);
if (buffer.readableBytes() < len) return null;
PeerAddress peerAddress =
new PeerAddress(id, buffer.array(), buffer.arrayOffset() + buffer.readerIndex());
buffer.skipBytes(len);
return peerAddress;
}
/**
* Decodes bytes from a channel buffer
*
* @param ctx a channel handler context
* @param channel a channel
* @param msg a message
* @return a byte array
*/
@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
if (!(msg instanceof ChannelBuffer)) {
return msg;
}
ChannelBuffer buf = (ChannelBuffer) msg;
byte[] array;
if (buf.hasArray()) {
if (buf.arrayOffset() == 0 && buf.readableBytes() == buf.capacity()) {
array = buf.array();
} else {
array = new byte[buf.readableBytes()];
buf.getBytes(0, array);
}
} else {
array = new byte[buf.readableBytes()];
buf.getBytes(0, array);
}
return array;
}
@Override
public int arrayOffset() {
return buffer.arrayOffset();
}