java.awt.event
Class InvocationEvent

java.lang.Object
 |
 +--java.util.EventObject
 |
 +--java.awt.AWTEvent
 |
 +--java.awt.event.InvocationEvent

All Implemented Interfaces:

ActiveEvent, Serializable

public class InvocationEvent

extends AWTEvent

implements ActiveEvent

Unsafe: An event which executes the run() method on a Runnable when dispatched by the AWT event dispatcher thread. This class can be used as a reference implementation of ActiveEvent rather than declaring a new class and defining dispatch().

Instances of this class are placed on the EventQueue by calls to invokeLater and invokeAndWait. Client code can use this fact to write replacement functions for invokeLater and invokeAndWait without writing special-case code in any AWTEventListener objects.

Since:

1.2

Version:

1.13, 12/03/01

Author:

Fred Ecks, David Mendenhall

See Also:

java.awt.ActiveEvent, java.awt.EventQueue#invokeLater, java.awt.EventQueue#invokeAndWait, AWTEventListener, Serialized Form

INVOCATION_FIRST

public static final int INVOCATION_FIRST

Enabled: Marks the first integer id for the range of invocation event ids.

INVOCATION_DEFAULT

public static final int INVOCATION_DEFAULT

Enabled: The default id for all InvocationEvents.

INVOCATION_LAST

public static final int INVOCATION_LAST

Enabled: Marks the last integer id for the range of invocation event ids.

runnable

protected Runnable runnable

The Runnable whose run() method will be called.

notifier

protected Object notifier

The (potentially null) Object whose notifyAll() method will be called immediately after the Runnable.run() method returns.

catchExceptions

protected boolean catchExceptions

Set to true if dispatch() catches Exception and stores it in the exception instance variable. If false, Exceptions are propagated up to the EventDispatchThread's dispatch loop.

exception

private Exception exception

The (potentially null) Exception thrown during execution of the Runnable.run() method. This variable will also be null if a particular instance does not catch exceptions.

when

private long when

The timestamp of when this event occurred.

See Also:

getWhen()

serialVersionUID

private static final long serialVersionUID

InvocationEvent

public InvocationEvent(Object source,
 Runnable runnable)

Suppressed: Constructs an InvocationEvent with the specified source which will execute the runnable's run method when dispatched.

Parameters:

source - the Object that originated the event

runnable - the Runnable whose run method will be executed

InvocationEvent

public InvocationEvent(Object source,
 Runnable runnable,
 Object notifier,
 boolean catchExceptions)

Suppressed: Constructs an InvocationEvent with the specified source which will execute the runnable's run method when dispatched. If notifier is non-null, notifyAll() will be called on it immediately after run returns.

Parameters:

source - the Object that originated the event

runnable - the Runnable whose run method will be executed

notifier - the Object whose notifyAll method will be called after Runnable.run has returned

catchExceptions - specifies whether dispatch should catch Exception when executing the Runnable's run method, or should instead propagate those Exceptions to the EventDispatchThread's dispatch loop

InvocationEvent

protected InvocationEvent(Object source,
 int id,
 Runnable runnable,
 Object notifier,
 boolean catchExceptions)

Constructs an InvocationEvent with the specified source and ID which will execute the runnable's run method when dispatched. If notifier is non-null, notifyAll will be called on it immediately after run returns.

Note that passing in an invalid id results in unspecified behavior.

Parameters:

source - the Object that originated the event

id - the ID for the event

runnable - the Runnable whose run method will be executed

notifier - the Object whose notifyAll method will be called after Runnable.run has returned

catchExceptions - specifies whether dispatch should catch Exception when executing the Runnable's run method, or should instead propagate those Exceptions to the EventDispatchThread's dispatch loop

public void dispatch()

public Exception getException()

public long getWhen()

public String paramString()