exec/java-exec/src/main/java/org/apache/drill/exec/planner/physical/visitor/PrelVisitor.java

/*
 * 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.
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package org.apache.drill.exec.planner.physical.visitor;

import org.apache.drill.exec.planner.physical.DirectScanPrel;
import org.apache.drill.exec.planner.physical.ExchangePrel;
import org.apache.drill.exec.planner.physical.JoinPrel;
import org.apache.drill.exec.planner.physical.LeafPrel;
import org.apache.drill.exec.planner.physical.Prel;
import org.apache.drill.exec.planner.physical.ProjectPrel;
import org.apache.drill.exec.planner.physical.ScanPrel;
import org.apache.drill.exec.planner.physical.ScreenPrel;
import org.apache.drill.exec.planner.physical.WriterPrel;
import org.apache.drill.exec.planner.physical.UnnestPrel;
import org.apache.drill.exec.planner.physical.LateralJoinPrel;


public interface PrelVisitor<RETURN, EXTRA, EXCEP extends Throwable> {
  org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(PrelVisitor.class);

  RETURN visitExchange(ExchangePrel prel, EXTRA value) throws EXCEP;
  RETURN visitScreen(ScreenPrel prel, EXTRA value) throws EXCEP;
  RETURN visitWriter(WriterPrel prel, EXTRA value) throws EXCEP;
  RETURN visitScan(ScanPrel prel, EXTRA value) throws EXCEP;
  RETURN visitScan(DirectScanPrel prel, EXTRA value) throws EXCEP;
  RETURN visitJoin(JoinPrel prel, EXTRA value) throws EXCEP;
  RETURN visitProject(ProjectPrel prel, EXTRA value) throws EXCEP;
  RETURN visitPrel(Prel prel, EXTRA value) throws EXCEP;
  RETURN visitUnnest(UnnestPrel prel, EXTRA value) throws EXCEP;
  RETURN visitLateral(LateralJoinPrel prel, EXTRA value) throws EXCEP;
  RETURN visitLeaf(LeafPrel prel, EXTRA value) throws EXCEP;
}