Java™ Platform
Standard Ed. 6

Class AbstractSelectionKey

  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.


Field Summary
Fields inherited from class java.nio.channels.SelectionKey
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

Constructor Detail


protected AbstractSelectionKey()
Initializes a new instance of this class.

Method Detail


public final boolean isValid()
Description copied from class: SelectionKey
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 in class SelectionKey
true if, and only if, this key is valid


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 in class SelectionKey

Java™ Platform
Standard Ed. 6

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