com.sun.squawk.vm
Class Channel

java.lang.Object
  com.sun.squawk.vm.Channel

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

GenericConnectionChannel, GUIInputChannel, GUIOutputChannel

public abstract class Channel
extends Object
implements java.io.Serializable

The base class for the specialized channels for stream IO, graphic operations and event handling.

See Also:

Serialized Form

Field Summary

protected ChannelIO	cio The owner of this channel.
protected long	result The result of the last operation on this channel.

Constructor Summary

Channel(ChannelIO cio, int channelID)
Constructor.

Method Summary

void	clearResult() Clear the result.
abstract void	close() Closes this channel.
int	getChannelID() Gets the identifier of this channel.
int	getEventNumber() Gets the event number used for blocking this channel.
long	getResult() Gets the result of the last successful operation on this channel.

Methods inherited from class java.lang.Object

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

Field Detail

result

protected long result

The result of the last operation on this channel.

cio

protected final ChannelIO cio

The owner of this channel.

Constructor Detail

Channel

public Channel(ChannelIO cio,
               int channelID)

Constructor.

Parameters:

cio - the owner of this channel

channelID - the identifier of this channel

Method Detail

clearResult

public final void clearResult()

Clear the result.

getResult

public final long getResult()

Gets the result of the last successful operation on this channel. The value returned is undefined if the last operation on this channel was not successful or did not generate a result value.

Returns:

long the result of the last successful operation on this channel

getChannelID

public final int getChannelID()

Gets the identifier of this channel.

Returns:

the identifier of this channel

getEventNumber

public final int getEventNumber()

Gets the event number used for blocking this channel.

Returns:

the event number used for blocking this channel

close

public abstract void close()

Closes this channel.