org.epics.pvmanager

Class PVReaderEvent<T>

java.lang.Object

org.epics.pvmanager.PVReaderEvent<T>

Type Parameters:

T - the type of the reader

public class PVReaderEvent<T>
extends Object

An event for the reader.

An event can be trigger by:

• a connection change; the connection either connected or disconnected
• an exception; an error either at the datasource or while calculating the expression
• a value change

One event can have multiple triggers. You can use the mask or the methods to check what condition applies.

Author:

carcassi

Field Summary

Fields

Modifier and Type	Field and Description
static int	CONNECTION_MASK Mask for a connection event.
static int	EXCEPTION_MASK Mask for an error event.
static int	VALUE_MASK Mask for a value change.

Method Summary

Methods

Modifier and Type	Method and Description
int	getNotificationMask() The mask for the event.
PVReader<T>	getPvReader() The reader that generated the event.
boolean	isConnectionChanged() Whether this event was generated by a connection change.
boolean	isExceptionChanged() Whether this event was generated in response to an error.
boolean	isValueChanged() Whether this event was generated by a value change.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

CONNECTION_MASK

public static int CONNECTION_MASK

Mask for a connection event.

EXCEPTION_MASK

public static int EXCEPTION_MASK

Mask for an error event.

VALUE_MASK

public static int VALUE_MASK

Mask for a value change.

Method Detail

getPvReader

public PVReader<T> getPvReader()

The reader that generated the event.

Returns:

the pv reader

getNotificationMask

public int getNotificationMask()

The mask for the event.

Returns:

event mask

isConnectionChanged

public boolean isConnectionChanged()

Whether this event was generated by a connection change.

Returns:

true if the connection status changed from the last notification

isValueChanged

public boolean isValueChanged()

Whether this event was generated by a value change.

Returns:

true if the value changed from the last notification

isExceptionChanged

public boolean isExceptionChanged()

Whether this event was generated in response to an error.

Returns:

true if a new exception is available

toString

public String toString()

Overrides:

toString in class Object