| /* |
| * 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.backend.hadoop.executionengine.physicalLayer.expressionOperators; |
| |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.plan.OperatorKey; |
| |
| /** |
| * This is a base class for all binary comparison operators. Supports the |
| * use of operand type instead of result type as the result type is |
| * always boolean. |
| * |
| * All comparison operators fetch the lhs and rhs operands and compare |
| * them for each type using different comparison methods based on what |
| * comparison is being implemented. |
| * |
| */ |
| public abstract class BinaryComparisonOperator extends BinaryExpressionOperator |
| implements ComparisonOperator { |
| private static final long serialVersionUID = -1711987060802103390L; |
| |
| protected byte operandType; |
| |
| public BinaryComparisonOperator(OperatorKey k) { |
| this(k,-1); |
| } |
| |
| public BinaryComparisonOperator(OperatorKey k, int rp) { |
| super(k, rp); |
| } |
| |
| public byte getOperandType() { |
| return operandType; |
| } |
| |
| public void setOperandType(byte operandType) { |
| this.operandType = operandType; |
| } |
| |
| protected void cloneHelper(BinaryComparisonOperator op) { |
| operandType = op.operandType; |
| super.cloneHelper(op); |
| } |
| |
| public Tuple illustratorMarkup(Object in, Object out, int eqClassIndex) { |
| if (illustrator != null) { |
| illustrator.setSubExpResult(eqClassIndex == 0); |
| } |
| return null; |
| } |
| } |