| /* |
| * 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.pig.newplan.logical.relational; |
| |
| import java.util.Iterator; |
| |
| import org.apache.pig.impl.logicalLayer.FrontendException; |
| import org.apache.pig.newplan.Operator; |
| import org.apache.pig.newplan.OperatorPlan; |
| import org.apache.pig.newplan.PlanVisitor; |
| import org.apache.pig.newplan.PlanWalker; |
| |
| /** |
| * A visitor for logical plans. |
| */ |
| public abstract class LogicalRelationalNodesVisitor extends PlanVisitor { |
| |
| protected LogicalRelationalNodesVisitor(OperatorPlan plan, PlanWalker walker) throws FrontendException { |
| super(plan, walker); |
| |
| Iterator<Operator> iter = plan.getOperators(); |
| while(iter.hasNext()) { |
| if (!(iter.next() instanceof LogicalRelationalOperator)) { |
| throw new FrontendException("LogicalPlanVisitor can only visit logical plan", 2240); |
| } |
| } |
| } |
| |
| public void visit(LOLoad load) throws FrontendException { |
| } |
| |
| public void visit(LOFilter filter) throws FrontendException { |
| } |
| |
| public void visit(LOStore store) throws FrontendException { |
| } |
| |
| public void visit(LOJoin join) throws FrontendException { |
| } |
| |
| public void visit(LOForEach foreach) throws FrontendException { |
| } |
| |
| public void visit(LOGenerate gen) throws FrontendException { |
| } |
| |
| public void visit(LOInnerLoad load) throws FrontendException { |
| } |
| |
| public void visit(LOCube cube) throws FrontendException { |
| } |
| |
| public void visit(LOCogroup loCogroup) throws FrontendException { |
| } |
| |
| public void visit(LOSplit loSplit) throws FrontendException { |
| } |
| |
| public void visit(LOSplitOutput loSplitOutput) throws FrontendException { |
| } |
| |
| public void visit(LOUnion loUnion) throws FrontendException { |
| } |
| |
| public void visit(LOSort loSort) throws FrontendException { |
| } |
| |
| public void visit(LORank loRank) throws FrontendException{ |
| } |
| |
| public void visit(LODistinct loDistinct) throws FrontendException { |
| } |
| |
| public void visit(LOLimit loLimit) throws FrontendException { |
| } |
| |
| public void visit(LOCross loCross) throws FrontendException { |
| } |
| |
| public void visit(LOStream loStream) throws FrontendException { |
| } |
| |
| public void visit(LONative nativeMR) throws FrontendException{ |
| } |
| } |