[PLC4X-201] OPC-UA PlcList underlying type not compatible with Eclipse Milo

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.9.0
• Component/s: Driver-OPC-UA
• Labels: beginner
• Flags: Important
• Assignee: Unassigned
• Reporter: Alessandro Rossignoli
• Created: 28/May/20 19:57
• Updated: 17/Sep/21 10:00
• Resolved: 03/Aug/21 20:42

Description

java.util.Collections$UnmodifiableRandomAccessList is not compatible with Eclipse Milo built-in types.

When writing to the OPC-UA driver a simple array of Double, I receive the following error:

[org.eclipse.milo.opcua.stack.core.serialization.OpcUaBinaryStreamEncoder:608]: Not a built-in type: class java.util.Collections$UnmodifiableRandomAccessList

When writing a single value in the array the type is PlcDouble instead of PlcList, and there is no error.

 

I think that a possible solution could be changing the underlying type, or better to change the getter for the value.

https://github.com/apache/plc4x/blob/4a74ff526aeb57e978005e37c878fe55021462aa/plc4j/api/src/main/java/org/apache/plc4x/java/api/value/PlcList.java#L46

I will try to find myself a solution and I will keep you posted.