| /* |
| * 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.test.utils; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.pig.newplan.Operator; |
| import org.apache.pig.newplan.logical.relational.LOForEach; |
| import org.apache.pig.newplan.logical.relational.LogicalPlan; |
| import org.apache.pig.newplan.logical.relational.LogicalRelationalOperator; |
| import static org.junit.Assert.*; |
| |
| /** |
| * Additional utility functions for new logical plan |
| */ |
| public class NewLogicalPlanUtil { |
| |
| /** |
| * Find single relational operator in plan that is instance of class c |
| * @param plan |
| * @param c |
| * @return |
| */ |
| public static LogicalRelationalOperator getRelOpFromPlan(LogicalPlan plan, Class<?> c){ |
| List<LogicalRelationalOperator>ops = getRelOpsFromPlan(plan,c); |
| if(ops.size() == 0) |
| return null; |
| else if(ops.size() > 1){ |
| fail("more than one operator of class " + c + " found in lp " + plan); |
| return null;//never gets here |
| }else |
| return ops.get(0); |
| |
| } |
| |
| /** |
| * Find relational operators that are instance of class c |
| * @param plan |
| * @param c |
| * @return |
| */ |
| public static List<LogicalRelationalOperator> getRelOpsFromPlan( |
| LogicalPlan plan, Class<?> c) { |
| Iterator<Operator> it = plan.getOperators(); |
| ArrayList<LogicalRelationalOperator> ops = |
| new ArrayList<LogicalRelationalOperator>(); |
| |
| while(it.hasNext()){ |
| Operator op = it.next(); |
| if(op.getClass() == c){ |
| ops.add((LogicalRelationalOperator) op); |
| } |
| if(op instanceof LOForEach){ |
| ops.addAll(getRelOpsFromPlan(((LOForEach)op).getInnerPlan(), c)); |
| } |
| } |
| return ops; |
| } |
| |
| } |