/*
* Copyright (c) 2009, IETR/INSA of Rennes
* 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 the IETR/INSA of Rennes 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 net.sf.orcc.frontend.schedule;
/**
* This class defines an edge that can be used in JGrapht graphs. This class is
* necessary because edges need to be unique (even when using a multi-graph). So
* this class simply wraps an object, but uses Object's equal and hashCode
* methods, meaning comparison by reference.
*
* @author Matthieu Wipliez
*
*/
public class UniqueEdge {
private Object object;
/**
* Creates a new edge with the given object.
*
* @param object
* an object
* @throws NullPointerException
* if tag is <code>null</code>
*/
public UniqueEdge(Object object) {
if (object == null) {
throw new NullPointerException();
}
this.object = object;
}
/**
* Returns the object associated with this edge.
*
* @return the object associated with this edge
*/
public Object getObject() {
return object;
}
@Override
public String toString() {
return object.toString();
}
}