| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors; |
| |
| import java.util.Map; |
| |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| import edu.uci.ics.hyracks.algebricks.core.api.exceptions.AlgebricksException; |
| |
| public class IsomorphismUtilities { |
| |
| public static void mapVariablesTopDown(ILogicalOperator op, ILogicalOperator arg, |
| Map<LogicalVariable, LogicalVariable> variableMapping) throws AlgebricksException { |
| IsomorphismVariableMappingVisitor visitor = new IsomorphismVariableMappingVisitor(variableMapping); |
| op.accept(visitor, arg); |
| } |
| |
| public static boolean isOperatorIsomorphic(ILogicalOperator op, ILogicalOperator arg) throws AlgebricksException { |
| IsomorphismOperatorVisitor visitor = new IsomorphismOperatorVisitor(); |
| return op.accept(visitor, arg).booleanValue(); |
| } |
| |
| } |