[jira] [Created] (PLC4X-288) Mock driver always writes null value

["Rogier Cobben (Jira)" <ji...@apache.org>]

Rogier Cobben created PLC4X-288:
-----------------------------------

             Summary: Mock driver always writes null value
                 Key: PLC4X-288
                 URL: https://issues.apache.org/jira/browse/PLC4X-288
             Project: Apache PLC4X
          Issue Type: Bug
          Components: Testing
    Affects Versions: 0.8.0
            Reporter: Rogier Cobben


The Mock driver is usefull for developing applications without available hardware. Reads from Mock devices work, but writes seem broken.

Scenario:

Extend *MockDevice* class and implement the *write* method. See that this device is set in the connection using the *MockConnection*.*setDevice* method.

When a WriteRequest is issued on the connection, the *MockDevice*.*write* method is indeed called, but the *value* parameter is always _*null*_. The given value to write is not passed through.

Debugging and looking into the sourcecode shows following:

*MockConnection.write* uses following statement to retrieve the value: 

 
{code:java}
// MockConnection:147
((MockField) writeRequest.getField(name)).getPlcValue()
{code}
This retrieves the *plcValue* member from the MockField object. This  *plcValue* is written to by constructor *MockField(String address, MockPlcValue plcValue)* only. However, I did not find any call to this constructor.

 

Note:

Other Drivers seem to use
{code:java}
writeRequest.getPlcValue() 
{code}
instead and do not have a value member in the Field class. (e.g. Simulator, Modbus )



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