| /* |
| * 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.properties; |
| |
| import java.util.List; |
| |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.IOperatorSchema; |
| |
| public class FilteredVariablePropagationPolicy extends VariablePropagationPolicy { |
| |
| List<LogicalVariable> toPropagate; |
| |
| public FilteredVariablePropagationPolicy(List<LogicalVariable> varList) { |
| toPropagate = varList; |
| } |
| |
| @Override |
| public void propagateVariables(IOperatorSchema target, IOperatorSchema... sources) { |
| for (LogicalVariable v : toPropagate) { |
| target.addVariable(v); |
| } |
| } |
| |
| } |