/*
* 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.backend.executionengine.ExecException;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.POStatus;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.Result;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhyPlanVisitor;
import org.apache.pig.data.DataType;
import org.apache.pig.impl.plan.OperatorKey;
import org.apache.pig.impl.plan.NodeIdGenerator;
import org.apache.pig.impl.plan.VisitorException;
/**
* Boolean not operator.
*/
public class PONot extends UnaryComparisonOperator {
/**
*
*/
private static final long serialVersionUID = 1L;
private Result trueRes, falseRes;
public PONot(OperatorKey k) {
this(k, -1);
}
public PONot(OperatorKey k, int rp) {
super(k, rp);
resultType = DataType.BOOLEAN;
}
@Override
public void visit(PhyPlanVisitor v) throws VisitorException {
v.visitNot(this);
}
@Override
public String name() {
return "Not" + "[" + DataType.findTypeName(resultType) + "]" +" - " + mKey.toString();
}
@Override
public Result getNext(Boolean b) throws ExecException {
if (trueRes == null) {
trueRes = new Result();
trueRes.returnStatus = POStatus.STATUS_OK;
trueRes.result = true;
falseRes = new Result();
falseRes.returnStatus = POStatus.STATUS_OK;
falseRes.result = Boolean.valueOf(false);
}
res = expr.getNext(dummyBool);
if(res.returnStatus != POStatus.STATUS_OK || res.result == null) {
return res;
}
if (((Boolean)res.result).booleanValue()) {
illustratorMarkup(null, falseRes.result, 1);
return falseRes;
}
else {
illustratorMarkup(null, trueRes.result, 0);
return trueRes;
}
}
@Override
public PONot clone() throws CloneNotSupportedException {
PONot clone = new PONot(new OperatorKey(mKey.scope,
NodeIdGenerator.getGenerator().getNextNodeId(mKey.scope)));
clone.cloneHelper(this);
return clone;
}
}