| /* |
| * 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; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.commons.lang3.mutable.Mutable; |
| |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.visitors.ILogicalExpressionReferenceTransform; |
| |
| /** |
| * @author Nicola |
| */ |
| public abstract class AbstractAssignOperator extends AbstractLogicalOperator { |
| protected final List<LogicalVariable> variables; |
| protected final List<Mutable<ILogicalExpression>> expressions; |
| |
| public AbstractAssignOperator() { |
| this.variables = new ArrayList<LogicalVariable>(); |
| this.expressions = new ArrayList<Mutable<ILogicalExpression>>(); |
| } |
| |
| public AbstractAssignOperator(List<LogicalVariable> variables, List<Mutable<ILogicalExpression>> expressions) { |
| this.variables = variables; |
| this.expressions = expressions; |
| } |
| |
| public List<LogicalVariable> getVariables() { |
| return variables; |
| } |
| |
| public List<Mutable<ILogicalExpression>> getExpressions() { |
| return expressions; |
| } |
| |
| @Override |
| public void recomputeSchema() { |
| schema = new ArrayList<LogicalVariable>(); |
| schema.addAll(inputs.get(0).getValue().getSchema()); |
| schema.addAll(variables); |
| } |
| |
| @Override |
| public boolean acceptExpressionTransform(ILogicalExpressionReferenceTransform visitor) throws AlgebricksException { |
| boolean modif = false; |
| for (int i = 0; i < expressions.size(); i++) { |
| if (visitor.transform(expressions.get(i))) { |
| modif = true; |
| } |
| } |
| return modif; |
| } |
| |
| } |