/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * 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.optaplanner.core.config.heuristic.selector.common.nearby;

import javax.xml.bind.annotation.XmlEnum;

@XmlEnum
public enum NearbySelectionDistributionType {
    /**
     * Only the n nearest are selected, with an equal probability.
     */
    BLOCK_DISTRIBUTION,
    /**
     * Nearest elements are selected with a higher probability. The probability decreases linearly.
     */
    LINEAR_DISTRIBUTION,
    /**
     * Nearest elements are selected with a higher probability. The probability decreases quadratically.
     */
    PARABOLIC_DISTRIBUTION,
    /**
     * Selection according to a beta distribution. Slows down the solver significantly.
     */
    BETA_DISTRIBUTION;

}
