/*
* Quasar: lightweight threads and actors for the JVM.
* Copyright (c) 2013-2014, Parallel Universe Software Co. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 3.0
* as published by the Free Software Foundation.
*/
package co.paralleluniverse.strands.channels;
/**
* A channel operation that is selected by a {@link Selector}.
*
* @author pron
*/
public abstract class SelectAction<Message> {
final Selectable<Message> port;
int index;
Message item;
volatile boolean done;
SelectAction(Selectable<Message> port) {
this.port = port;
}
/**
* Returns the message to send if this is a send operation, or the message that has been received if this is a receive operation and has been
* successfully completed by the selector.
*
* @return the message to send if this is a send operation, or the message that has been received if this is a receive operation and has been
* successfully completed by the selector.
*/
public Message message() {
return item;
}
public int index() {
return index;
}
/**
* Returns the channel for this operation.
*
* @return the channel for this operation.
*/
public Port<Message> port() {
return (Port<Message>) port;
}
/**
* Tests whether this operation is the one operation that has been selected and completed by the selector.
*
* @return {@code true} if this operation is the one operation that has been selected and completed by the selector; {@code false} otherwise.
*/
public boolean isDone() {
return done;
}
}