public class DataAvailableEvent
extends java.util.EventObject
DataAccess
to a view and to notify the view when the DataAccess
is no
longer usable.
Views listen for this event in order to remain current with the
data provider.Modifier and Type | Field and Description |
---|---|
protected DataAccess |
_provider |
protected int |
_type |
static int |
DATA_AVAILABLE
Data is now available.
|
static int |
DATA_UNAVAILABLE
Data is no longer available.
|
Constructor and Description |
---|
DataAvailableEvent(java.lang.Object source,
DataAccess provider)
Constructor for data availability only.
|
DataAvailableEvent(java.lang.Object source,
int type,
DataAccess provider)
Constructor for specifying either availability or unavailability.
|
Modifier and Type | Method and Description |
---|---|
DataAccess |
getDataAccess()
Retrieves the
DataAccess for this event. |
int |
getType()
Retrieves the type of change in availability.
|
public static final int DATA_AVAILABLE
public static final int DATA_UNAVAILABLE
protected int _type
protected DataAccess _provider
public DataAvailableEvent(java.lang.Object source, int type, DataAccess provider)
source
- The source of this event.type
- A constant that specifies whether the data is available or
unavailable.provider
- The DataAccess
. If type
is
DATA_AVAILABLE
, the DataAccess
that provides access to the data. If type
is
DATA_UNAVAILABLE
, the DataAccess
that did provide access to the data but is no longer usable.public DataAvailableEvent(java.lang.Object source, DataAccess provider)
source
- The source of this event.provider
- The DataAccess
that provides access to the
data.public int getType()
public DataAccess getDataAccess()
DataAccess
for this event.DataAccess
that provides access to the
data (if the getType
method returns
DATA_AVAILABLE
), or that is no longer usable (if
the getType
method returns
DATA_UNAVAILABLE
).