| /* |
| * 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 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.ILogicalOperator; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.properties.VariablePropagationPolicy; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.visitors.ILogicalExpressionReferenceTransform; |
| |
| public abstract class AbstractBinaryJoinOperator extends AbstractLogicalOperator { |
| protected final Mutable<ILogicalExpression> condition; |
| protected JoinKind joinKind; |
| |
| public enum JoinKind { |
| INNER, |
| LEFT_OUTER |
| } |
| |
| public AbstractBinaryJoinOperator(JoinKind joinKind, Mutable<ILogicalExpression> condition) { |
| this.joinKind = joinKind; |
| this.condition = condition; |
| } |
| |
| public AbstractBinaryJoinOperator(JoinKind joinKind, Mutable<ILogicalExpression> condition, |
| Mutable<ILogicalOperator> input1, Mutable<ILogicalOperator> input2) { |
| this(joinKind, condition); |
| inputs.add(input1); |
| inputs.add(input2); |
| } |
| |
| public Mutable<ILogicalExpression> getCondition() { |
| return condition; |
| } |
| |
| public JoinKind getJoinKind() { |
| return joinKind; |
| } |
| |
| @Override |
| public void recomputeSchema() { |
| schema = new ArrayList<LogicalVariable>(); |
| schema.addAll(inputs.get(0).getValue().getSchema()); |
| schema.addAll(inputs.get(1).getValue().getSchema()); |
| } |
| |
| @Override |
| public VariablePropagationPolicy getVariablePropagationPolicy() { |
| return VariablePropagationPolicy.concat(VariablePropagationPolicy.ALL, VariablePropagationPolicy.ALL); |
| } |
| |
| @Override |
| public boolean acceptExpressionTransform(ILogicalExpressionReferenceTransform visitor) throws AlgebricksException { |
| return visitor.transform(condition); |
| } |
| |
| @Override |
| public boolean isMap() { |
| return false; |
| } |
| } |