/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.flink.optimizer.postpass;

import org.apache.flink.optimizer.plan.OptimizedPlan;

/**
 * Interface for visitors that process the optimizer's plan. Typical post processing applications
 * are schema finalization or the generation/parameterization of utilities for the actual data
 * model.
 */
public interface OptimizerPostPass {

    /**
     * Central post processing function. Invoked by the optimizer after the best plan has been
     * determined.
     *
     * @param plan The plan to be post processed.
     */
    void postPass(OptimizedPlan plan);
}
