解码 OPC-UA 扩展 object

Question

How does one decode extension object obtained from HistoryReadResult to HistoryData type? I read documentation that suggessts simply using the decode() method but the only variant I can find in the source code is that of decode(EncoderContext).

Answer 1

You forgot to mention which stack or SDK you are using, but I can guess that it's the OPC Foundation Java Stack, in which case, you can use EncoderContext.getDefaultInstance() . This will work fine with the standard structure types, such as HistoryData. For server specific types, you may need to use a connection specific EncoderContext.