org.eclipse.jetty.deploy.graph.Edge Maven / Gradle / Ivy
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//
// ========================================================================
// Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.deploy.graph;
/**
* Basic Graph Edge
*/
public final class Edge
{
private Node _from;
private Node _to;
public Edge(Node from, Node to)
{
if (from==null || to==null || from==to)
throw new IllegalArgumentException("from "+from+" to "+to);
_from = from;
_to = to;
}
@Override
public int hashCode()
{
return _from.hashCode() ^ _to.hashCode();
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Edge other = (Edge)obj;
if (_from == null)
{
if (other._from != null)
return false;
}
else if (!_from.equals(other._from))
return false;
if (_to == null)
{
if (other._to != null)
return false;
}
else if (!_to.equals(other._to))
return false;
return true;
}
public Node getFrom()
{
return _from;
}
public Node getTo()
{
return _to;
}
@Override
public String toString()
{
return _from+"->"+_to;
}
}