EventRegistry (Java Card API, Classic Edition)

java.lang.Object
- javacardx.framework.event.EventRegistry

```
public abstract class EventRegistry
extends Object
```
An event registry instance is used by applications to register or unregister event listeners for a particular source of events.

Since:

3.1

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static EventRegistry`	`getEventRegistry(EventSource source)`	Retrieves the event registry for the specified source of events or return `null` if source is unknown or no registry exists for this source.
`void`	`register(EventListener listener)`	Register an event listener for this source of events.
`void`	`unregister(EventListener listener)`	Unregister the specified event listener.

Methods inherited from class java.lang.Object
equals

- Method Detail
  - getEventRegistry
```
public static EventRegistry getEventRegistry(EventSource source)
```
    Retrieves the event registry for the specified source of events or return null if source is unknown or no registry exists for this source.
    
    Parameters:
    
    source - the source of events
    
    Returns:
    
    the EventRegistry instance for the specified source of events
  - register
```
public void register(EventListener listener)
```
    Register an event listener for this source of events.
    
    Parameters:
    
    listener - the event listener to register
  - unregister
```
public void unregister(EventListener listener)
```
    Unregister the specified event listener.
    
    Parameters:
    
    listener - the event listener to unregister