/*
 *
 *  * Copyright 2016 Open Networking Laboratory
 *  *
 *  * Licensed under the Apache License, Version 2.0 (the "License");
 *  * you may not use this file except in compliance with the License.
 *  * You may obtain a copy of the License at
 *  *
 *  *     http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  * Unless required by applicable law or agreed to in writing, software
 *  * distributed under the License is distributed on an "AS IS" BASIS,
 *  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  * See the License for the specific language governing permissions and
 *  * limitations under the License.
 *
 */

package org.onosproject.net.behaviour;

import org.onosproject.net.device.PortDescription;
import org.onosproject.net.driver.HandlerBehaviour;

import java.util.List;

/**
 * Discovers the set of ports from a device through a device specific protocol.
 * The returned ports are not retrieved from the information stored in ONOS.
 */
public interface PortDiscovery extends HandlerBehaviour {

    /**
     * Retrieves the set of ports from a device.
     * @return a set of port descriptions.
     */
    List<PortDescription> getPorts();
}