I would like to know if it is possible to write to a Node of complex dataType (Structur). Has someone already tried it? I am talking about client side.
I am testing now with UaCppServer where I found a Test Strucur from DaType Person, f.e I try to chnage some of the value of ns=2;s=Person3 using UAExpect and it works. But whene I try with Milo client I get some Bad_WriteNotSupported error code
private void readWriteCustomDataType(OpcUaClient client) throws InterruptedException, ExecutionException
{
LOG.info("readWriteCustomDataType ...");
LOG.info("------------------------------------------//-------------------------------------------");
// synchronous read request via VariableNode
VariableNode node = client.getAddressSpace().createVariableNode(
new NodeId(2, "Person3"));
LOG.info("DataType={}", node.getDataType().get());
// Read the current value
DataValue value = node.readValue().get();
LOG.info("Value={}", value);
Variant variant = value.getValue();
ExtensionObject xo = (ExtensionObject) variant.getValue();
org.eclipse.milo.opcua.binaryschema.Struct decoded = (Struct)xo.decode(client.getSerializationContext());
LOG.info("Decoded={}", decoded);
// CustomStructurePerson decoded = (CustomStructurePerson)xo.decode(
// client.getSerializationContext()
// );
org.eclipse.milo.opcua.binaryschema.Struct modified = Struct.builder(decoded.getName()).
addMember("Name", "Master steen").
addMember("Height", UShort.valueOf(123)).
addMember("Weight", Float.valueOf((float)2.2)).
addMember("Gender", UShort.valueOf(2))
.build();
LOG.info("Modified={}", modified);
// Write a modified value
// CustomStructurePerson modified = new CustomStructurePerson(
// decoded.getName() + " has changed",
// uint(decoded.getHeight().intValue() + 1),
// uint(decoded.getWeight().intValue() + 1),
// "male"
// );
ExtensionObject modifiedXo = ExtensionObject.encode(
client.getSerializationContext(),
decoded,
xo.getEncodingId(),
OpcUaDefaultBinaryEncoding.getInstance()
);
StatusCode writeStatus = node.writeValue(new DataValue(new Variant(modifiedXo))).get();
LOG.info("writeStatus={}", writeStatus);
// Read the modified value back
value = node.readValue().get();
LOG.info("Modified Value={}", value);
variant = value.getValue();
xo = (ExtensionObject)variant.getValue();
decoded = (Struct)xo.decode(client.getSerializationContext());
LOG.info("Decoded={}", decoded);
}
@Kevin could you please that this is possible? The spec says that client should be able to deal with reading/writing the Structur. Or am I miss something?
