/*
Below is the copyright agreement for the Ptolemy II system.
Version: $Id$

Copyright (c) 2007-2009 The Regents of the University of California.
All rights reserved.

Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.

IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.
*/
package doc.tutorial;

import ptolemy.actor.AbstractReceiver;
import ptolemy.actor.Director;
import ptolemy.actor.IOPort;
import ptolemy.actor.NoRoomException;
import ptolemy.actor.NoTokenException;
import ptolemy.actor.Receiver;
import ptolemy.data.StringToken;
import ptolemy.data.Token;
import ptolemy.data.expr.StringParameter;
import ptolemy.domains.sdf.kernel.SDFReceiver;
import ptolemy.kernel.CompositeEntity;
import ptolemy.kernel.util.IllegalActionException;
import ptolemy.kernel.util.NameDuplicationException;

public class AmorphousDirector extends Director {

    public AmorphousDirector(CompositeEntity container, String name)
            throws IllegalActionException, NameDuplicationException {
        super(container, name);
    }

    public Receiver newReceiver() {
        return new DelegatingReceiver();
    }

    public static class DelegatingReceiver extends AbstractReceiver {

        private Receiver _receiver;

        public DelegatingReceiver() {
            super();
            _receiver = new SDFReceiver();
        }

        public DelegatingReceiver(IOPort container)
                throws IllegalActionException {
            super(container);
            _receiver = new SDFReceiver(container);
        }

        public void clear() throws IllegalActionException {
            IOPort container = getContainer();
            if (container != null) {
                StringParameter receiverClass = (StringParameter) container
                        .getAttribute("receiverClass", StringParameter.class);
                if (receiverClass != null) {
                    String className = ((StringToken) receiverClass.getToken())
                            .stringValue();
                    try {
                        Class desiredClass = Class.forName(className);
                        _receiver = (Receiver) desiredClass.newInstance();
                    } catch (Exception e) {
                        throw new IllegalActionException(container, e,
                                "Invalid class for receiver: " + className);
                    }
                }
            }
            _receiver.clear();
        }

        public Token get() throws NoTokenException {
            return _receiver.get();
        }

        public boolean hasRoom() {
            return _receiver.hasRoom();
        }

        public boolean hasRoom(int numberOfTokens) {
            return _receiver.hasRoom(numberOfTokens);
        }

        public boolean hasToken() {
            return _receiver.hasToken();
        }

        public boolean hasToken(int numberOfTokens) {
            return _receiver.hasToken(numberOfTokens);
        }

        public void put(Token token) throws NoRoomException,
                IllegalActionException {
            _receiver.put(token);
        }
    }
}