/*

 * Copyright (c) 2008-2011, Matthias Mann

 *

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 *     * Redistributions of source code must retain the above copyright notice,

 *       this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above copyright

 *       notice, this list of conditions and the following disclaimer in the

 *       documentation and/or other materials provided with the distribution.

 *     * Neither the name of Matthias Mann nor the names of its contributors may

 *       be used to endorse or promote products derived from this software

 *       without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

package nodes;

/**

 *

 * @author Matthias Mann

 */

public class Connection {

    private final Pad source;

    private final Pad destination;

    public Connection(Pad source, Pad destination) {

        if(source == null) {

            throw new NullPointerException("source");

        }

        if(destination == null) {

            throw new NullPointerException("dest");

        }

        this.source = source;

        this.destination = destination;

    }

    public Pad getDestination() {

        return destination;

    }

    public Pad getSource() {

        return source;

    }

    @Override

    public boolean equals(Object obj) {

        if(obj == null || getClass() != obj.getClass()) {

            return false;

        }

        final Connection other = (Connection)obj;

        return (this.source == other.source) && (this.destination == other.destination);

    }

    @Override

    public int hashCode() {

        int hash = 7;

        hash = 79 * hash + System.identityHashCode(this.source);

        hash = 79 * hash + System.identityHashCode(this.destination);

        return hash;

    }

}