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/*
* MIT License
*
* Copyright (c) 2017 atlarge-research
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.atlarge.opendc.model.topology
import com.atlarge.opendc.simulator.Entity
/**
* An edge that represents a directed relationship between exactly two nodes in a logical topology of a cloud network.
*
* @param T The relationship type the edge represents within a logical topology.
* @author Fabian Mastenbroek (f.s.mastenbroek@student.tudelft.nl)
*/
interface Edge<out T> : Component {
/**
* The label of this edge.
*/
val label: T
/**
* A tag to uniquely identify the relationship this edge represents.
*/
val tag: String?
/**
* The source of the edge.
*
* This property is not guaranteed to have a runtime complexity of <code>O(1)</code>, but must be at least
* <code>O(n)</code>, with respect to the size of the topology.
*/
val from: Entity<*, Topology>
/**
* The destination of the edge.
*
* This property is not guaranteed to have a runtime complexity of <code>O(1)</code>, but must be at least
* <code>O(n)</code>, with respect to the size of the topology.
*/
val to: Entity<*, Topology>
}
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