| /* |
| * 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.drill.exec.planner; |
| |
| import org.apache.drill.exec.physical.base.AbstractPhysicalVisitor; |
| import org.apache.drill.exec.physical.base.Exchange; |
| import org.apache.drill.exec.planner.fragment.Wrapper; |
| |
| public abstract class AbstractOpWrapperVisitor<RET, EXCEP extends Throwable> extends |
| AbstractPhysicalVisitor<RET, Wrapper, EXCEP> { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(AbstractOpWrapperVisitor.class); |
| |
| @Override |
| public final RET visitExchange(Exchange exchange, Wrapper wrapper) throws EXCEP { |
| if (wrapper.getNode().getSendingExchange() == exchange) { |
| return visitSendingExchange(exchange, wrapper); |
| } else { |
| return visitReceivingExchange(exchange, wrapper); |
| } |
| } |
| |
| public RET visitSendingExchange(Exchange exchange, Wrapper wrapper) throws EXCEP { |
| return visitOp(exchange, wrapper); |
| } |
| |
| public RET visitReceivingExchange(Exchange exchange, Wrapper wrapper) throws EXCEP { |
| return visitOp(exchange, wrapper); |
| } |
| |
| } |