com.helger.commons.callback

Interface ICallbackList<CALLBACKTYPE extends ICallback>

Type Parameters:

CALLBACKTYPE - The callback type.

All Superinterfaces:

Serializable

All Known Implementing Classes:

CallbackList

public interface ICallbackList<CALLBACKTYPE extends ICallback>
extends Serializable

Read-only interface for a list of ICallback objects

Author:

Philip Helger

Method Summary

Modifier and Type	Method and Description
List<CALLBACKTYPE>	getAllCallbacks()
CALLBACKTYPE	getCallbackAtIndex(int nIndex) Get the callback at the specified index.
int	getCallbackCount()
boolean	hasCallbacks()

Method Detail

getAllCallbacks

@Nonnull
 @ReturnsMutableCopy
List<CALLBACKTYPE> getAllCallbacks()

Returns:

A list of all callbacks. Never null and only containing non-null elements.

getCallbackAtIndex

@Nullable
CALLBACKTYPE getCallbackAtIndex(@Nonnegative
                                           int nIndex)

Get the callback at the specified index.

Parameters:

nIndex - The index to be retrieved. Should be ≥ 0.

Returns:

null if the provided index is invalid.

getCallbackCount

@Nonnegative
int getCallbackCount()

Returns:

The number of contained callbacks. Always ≥ 0.

hasCallbacks

boolean hasCallbacks()

Returns:

true if at least a single callback is present, false otherwise.