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/*
* Copyright 2014 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.intent;
import com.google.common.annotations.Beta;
import org.onosproject.net.Link;
import org.onosproject.net.Path;
import org.onosproject.net.resource.link.LinkResourceService;
/**
* Representation of a connectivity constraint capable of evaluating a link
* and determining the cost of traversing that link in the context of this
* constraint.
*/
@Beta
public interface Constraint {
// TODO: Consider separating cost vs viability.
/**
* Evaluates the specified link and provides the cost for its traversal.
*
* @param link link to be evaluated
* @param resourceService resource service for validating availability of
* link resources
* @return cost of link traversal
*/
double cost(Link link, LinkResourceService resourceService);
/**
* Validates that the specified path satisfies the constraint.
*
* @param path path to be validated
* @param resourceService resource service for validating availability of
* link resources
* @return cost of link traversal
*/
boolean validate(Path path, LinkResourceService resourceService);
}
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