content: /*
   * 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.calcite.rel;
  
  import org.apache.calcite.rel.core.TableFunctionScan;
  import org.apache.calcite.rel.core.TableScan;
  import org.apache.calcite.rel.logical.LogicalAggregate;
  import org.apache.calcite.rel.logical.LogicalCalc;
  import org.apache.calcite.rel.logical.LogicalCorrelate;
  import org.apache.calcite.rel.logical.LogicalExchange;
  import org.apache.calcite.rel.logical.LogicalFilter;
  import org.apache.calcite.rel.logical.LogicalIntersect;
  import org.apache.calcite.rel.logical.LogicalJoin;
  import org.apache.calcite.rel.logical.LogicalMatch;
  import org.apache.calcite.rel.logical.LogicalMinus;
  import org.apache.calcite.rel.logical.LogicalProject;
  import org.apache.calcite.rel.logical.LogicalRepeatUnion;
  import org.apache.calcite.rel.logical.LogicalSort;
  import org.apache.calcite.rel.logical.LogicalTableModify;
  import org.apache.calcite.rel.logical.LogicalUnion;
  import org.apache.calcite.rel.logical.LogicalValues;
  
  /**
   * Visits all the relations in a homogeneous way: always redirects calls to
   * {@code accept(RelNode)}.
   */
  public class RelHomogeneousShuttle extends RelShuttleImpl {
    @Override public RelNode visit(LogicalAggregate aggregate) {
      return visit((RelNode) aggregate);
    }
  
    @Override public RelNode visit(LogicalMatch match) {
      return visit((RelNode) match);
    }
  
    @Override public RelNode visit(TableScan scan) {
      return visit((RelNode) scan);
    }
  
    @Override public RelNode visit(TableFunctionScan scan) {
      return visit((RelNode) scan);
    }
  
    @Override public RelNode visit(LogicalValues values) {
      return visit((RelNode) values);
    }
  
    @Override public RelNode visit(LogicalFilter filter) {
      return visit((RelNode) filter);
    }
  
    @Override public RelNode visit(LogicalProject project) {
      return visit((RelNode) project);
    }
  
    @Override public RelNode visit(LogicalJoin join) {
      return visit((RelNode) join);
    }
  
    @Override public RelNode visit(LogicalCorrelate correlate) {
      return visit((RelNode) correlate);
    }
  
    @Override public RelNode visit(LogicalUnion union) {
      return visit((RelNode) union);
    }
  
    @Override public RelNode visit(LogicalIntersect intersect) {
      return visit((RelNode) intersect);
    }
  
    @Override public RelNode visit(LogicalMinus minus) {
      return visit((RelNode) minus);
    }
  
    @Override public RelNode visit(LogicalSort sort) {
      return visit((RelNode) sort);
    }
  
    @Override public RelNode visit(LogicalExchange exchange) {
      return visit((RelNode) exchange);
    }
  
    @Override public RelNode visit(LogicalCalc calc) {
      return visit((RelNode) calc);
    }
  
    @Override public RelNode visit(LogicalTableModify modify) {
      return visit((RelNode) modify);
    }
  
    @Override public RelNode visit(LogicalRepeatUnion repeatUnion) {
      return visit((RelNode) repeatUnion);
    }
  }
  