12:39, EEST
April 3, 2012
If the DataType Attribute is a ByteString then from OPC UA’s perspective it is just a series of bytes. It is a scalar type that consists of an array of bytes that can only be Read/Write completely not in parts (similarly as a String is in programming languages a series of characters). An OPC UA ByteString will map to byte[] in Java. Therefore it can be accessed like any other java array e.g. first element
byte[] bs = (byte[]) dv.getValue().getValue(); //assuming it is a ByteString
byte element0 = bs[0];
Please let me know if my interpretation of your question was wrong.
– Bjarne
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