IncomingDataHandler (OpenTrafficSim Sim0MQ bus linkage 1.6.0 API)

```
public interface IncomingDataHandler
```
Interface for handlers of incoming data and commands that are not directly processed by the Publisher.
Copyright (c) 2021-2020=1 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

Author:

Alexander Verbraeck, Peter Knoppers

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getId()`	Obtain a descriptive name of the IncomingDataHandler.
`String`	`getKey()`	Obtain the key that is used to identify incoming data destined for this IncomingDataHandler, (this key should appear in field 5 of the Sim0MQ messages).
`String`	`handleIncomingData(Object[] decodedMessage)`	Process incoming data.

- Method Detail
  - getId
```
String getId()
```
    Obtain a descriptive name of the IncomingDataHandler.
    
    Returns:
    
    String; a descriptive name of the IncomingDataHandler
  - getKey
```
String getKey()
```
    Obtain the key that is used to identify incoming data destined for this IncomingDataHandler, (this key should appear in field 5 of the Sim0MQ messages).
    
    Returns:
    
    String; the key that identify incoming data destined for this IncomingDataHandler
  - handleIncomingData
```
String handleIncomingData(Object[] decodedMessage)
```
    Process incoming data.
    
    Parameters:
    
    decodedMessage - Object[]; decoded Sim0MQMessages that has been converted by the createObjectArray method
    
    Returns:
    
    String; null on success, nonNull on failure to handle the data