001/*
002 * This file is part of the Kompics component model runtime.
003 *
004 * Copyright (C) 2009 Swedish Institute of Computer Science (SICS) Copyright (C)
005 * 2009 Royal Institute of Technology (KTH)
006 *
007 * Kompics is free software; you can redistribute it and/or modify it under the
008 * terms of the GNU General Public License as published by the Free Software
009 * Foundation; either version 2 of the License, or (at your option) any later
010 * version.
011 *
012 * This program is distributed in the hope that it will be useful, but WITHOUT
013 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
014 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
015 * details.
016 *
017 * You should have received a copy of the GNU General Public License along with
018 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
019 * Place - Suite 330, Boston, MA 02111-1307, USA.
020 */
021package se.sics.kompics;
022
023/**
024 *
025 * @author Lars Kroll {@literal <[email protected]>}
026 */
027public abstract class SimpleChannel<PT extends PortType> implements ChannelCore<PT> {
028    /* === PRIVATE === */
029    protected volatile boolean destroyed = false;
030    protected final PortCore<PT> positivePort;
031    protected final PortCore<PT> negativePort;
032    protected final PT portType;
033
034    public SimpleChannel(PortCore<PT> positivePort, PortCore<PT> negativePort) {
035        this.positivePort = positivePort;
036        this.negativePort = negativePort;
037        this.portType = positivePort.portType;
038    }
039
040    @Override
041    public boolean isDestroyed() {
042        return destroyed;
043    }
044
045    private void destroy() {
046        destroyed = true;
047    }
048
049    @Override
050    public boolean hasPositivePort(Port<PT> port) {
051        return positivePort == port;
052    }
053
054    @Override
055    public boolean hasNegativePort(Port<PT> port) {
056        return negativePort == port;
057    }
058
059    @Override
060    public void disconnect() {
061        this.destroy();
062        positivePort.removeChannel(this);
063        negativePort.removeChannel(this);
064    }
065
066    @Override
067    public PT getPortType() {
068        return portType;
069    }
070}