AbstractSelectionKey (Java Platform SE 6) (original) (raw)

java.nio.channels.spi

Class AbstractSelectionKey

java.lang.Object extended by java.nio.channels.SelectionKey extended by java.nio.channels.spi.AbstractSelectionKey

public abstract class AbstractSelectionKey

extends SelectionKey

Base implementation class for selection keys.

This class tracks the validity of the key and implements cancellation.

Since:

1.4

Field Summary
Fields inherited from class java.nio.channels.SelectionKey
OP_ACCEPT, OP_CONNECT, OP_READ, OP_WRITE
Constructor Summary
protected AbstractSelectionKey() Initializes a new instance of this class.
Method Summary
void cancel() Cancels this key.
boolean isValid() Tells whether or not this key is valid.
Methods inherited from class java.nio.channels.SelectionKey
attach, attachment, channel, interestOps, interestOps, isAcceptable, isConnectable, isReadable, isWritable, readyOps, selector
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, [wait](../../../../java/lang/Object.html#wait%28long, int%29)
Constructor Detail

AbstractSelectionKey

protected AbstractSelectionKey()

Initializes a new instance of this class.

Method Detail

isValid

public final boolean isValid()

Description copied from class: [SelectionKey](../../../../java/nio/channels/SelectionKey.html#isValid%28%29)

Tells whether or not this key is valid.

A key is valid upon creation and remains so until it is cancelled, its channel is closed, or its selector is closed.

Specified by:

[isValid](../../../../java/nio/channels/SelectionKey.html#isValid%28%29) in class [SelectionKey](../../../../java/nio/channels/SelectionKey.html "class in java.nio.channels")

Returns:

true if, and only if, this key is valid

cancel

public final void cancel()

Cancels this key.

If this key has not yet been cancelled then it is added to its selector's cancelled-key set while synchronized on that set.

Specified by:

[cancel](../../../../java/nio/channels/SelectionKey.html#cancel%28%29) in class [SelectionKey](../../../../java/nio/channels/SelectionKey.html "class in java.nio.channels")

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