core/api/src/main/java/org/onosproject/net/Lambda.java

/*
 * Copyright 2015 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;

/**
 * Abstraction of wavelength. Currently, this is just a marker interface
 */
public interface Lambda {
    /**
     * Create an Lambda instance with the specified wavelength index number.
     *
     * @param lambda index number
     * @return an instance
     */
    static Lambda indexedLambda(long lambda) {
        return new IndexedLambda(lambda);
    }

    /**
     * Creates a Lambda instance with the specified arguments.
     *
     * @param gridType          grid type
     * @param channelSpacing    channel spacing
     * @param spacingMultiplier channel spacing multiplier
     * @param slotGranularity   slot width granularity
     */
    static Lambda ochSignal(GridType gridType, ChannelSpacing channelSpacing,
                            int spacingMultiplier, int slotGranularity) {
        return new OchSignal(gridType, channelSpacing, spacingMultiplier, slotGranularity);
    }
}