    //////////////////////////////////////////////////////////////////////
    //                                                                  //
    //  JCSP ("CSP for Java") Libraries                                 //
    //  Copyright (C) 1996-2008 Peter Welch and Paul Austin.            //
    //                2001-2004 Quickstone Technologies Limited.        //
    //                                                                  //
    //  This library is free software; you can redistribute it and/or   //
    //  modify it under the terms of the GNU Lesser General Public      //
    //  License as published by the Free Software Foundation; either    //
    //  version 2.1 of the License, or (at your option) any later       //
    //  version.                                                        //
    //                                                                  //
    //  This library is distributed in the hope that it will be         //
    //  useful, but WITHOUT ANY WARRANTY; without even the implied      //
    //  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR         //
    //  PURPOSE. See the GNU Lesser General Public License for more     //
    //  details.                                                        //
    //                                                                  //
    //  You should have received a copy of the GNU Lesser General       //
    //  Public License along with this library; if not, write to the    //
    //  Free Software Foundation, Inc., 59 Temple Place, Suite 330,     //
    //  Boston, MA 02111-1307, USA.                                     //
    //                                                                  //
    //  Author contact: P.H.Welch@kent.ac.uk                             //
    //                                                                  //
    //////////////////////////////////////////////////////////////////////

package org.jcsp.lang;

class AltingChannelInputImpl extends AltingChannelInput {

	private ChannelInternals channel;
	private int immunity;
	
	AltingChannelInputImpl(ChannelInternals _channel, int _immunity) {
		channel = _channel;
		immunity = _immunity;
	}
	
	
	public boolean pending() {
		return channel.readerPending();
	}
	
	boolean disable() {
		return channel.readerDisable();
	}

	boolean enable(Alternative alt) {
		return channel.readerEnable(alt);
	}

	public void endRead() {
		channel.endRead();
	}

	public Object read() {
		return channel.read();
	}

	public Object startRead() {
		return channel.startRead();
	}

	public void poison(int strength) {
		if (strength > immunity) {
			channel.readerPoison(strength);
		}
	}

}
