| /* |
| * 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.iotdb.db.mpp.plan.planner.plan.node; |
| |
| import java.util.List; |
| |
| import static com.google.common.collect.ImmutableList.toImmutableList; |
| |
| public class SimplePlanNodeRewriter<C> extends PlanVisitor<PlanNode, C> { |
| @Override |
| public PlanNode visitPlan(PlanNode node, C context) { |
| // TODO: (xingtanzjr) we apply no action for IWritePlanNode currently |
| if (node instanceof WritePlanNode) { |
| return node; |
| } |
| return defaultRewrite(node, context); |
| } |
| |
| public PlanNode defaultRewrite(PlanNode node, C context) { |
| List<PlanNode> children = |
| node.getChildren().stream() |
| .map(child -> rewrite(child, context)) |
| .collect(toImmutableList()); |
| |
| return node.cloneWithChildren(children); |
| } |
| |
| public PlanNode rewrite(PlanNode node, C userContext) { |
| return node.accept(this, userContext); |
| } |
| } |